diff --git a/best_practices/business-logic.rst b/best_practices/business-logic.rst
index a6313ae4cbf..143e1f696a4 100644
--- a/best_practices/business-logic.rst
+++ b/best_practices/business-logic.rst
@@ -312,11 +312,11 @@ Then, enable the bundle in ``AppKernel.php``, but only for the ``dev`` and
     {
         public function registerBundles()
         {
-            $bundles = array(
+            $bundles = [
                 // ...
-            );
+            ];
 
-            if (in_array($this->getEnvironment(), array('dev', 'test'))) {
+            if (in_array($this->getEnvironment(), ['dev', 'test'])) {
                 // ...
                 $bundles[] = new Doctrine\Bundle\FixturesBundle\DoctrineFixturesBundle();
             }
diff --git a/best_practices/controllers.rst b/best_practices/controllers.rst
index 13beba910bd..2be1bf6f01e 100644
--- a/best_practices/controllers.rst
+++ b/best_practices/controllers.rst
@@ -108,9 +108,9 @@ for the homepage of our app::
                 ->getRepository(Post::class)
                 ->findLatest();
 
-            return $this->render('default/index.html.twig', array(
+            return $this->render('default/index.html.twig', [
                 'posts' => $posts,
-            ));
+            ]);
         }
     }
 
@@ -155,10 +155,10 @@ For example::
     {
         $deleteForm = $this->createDeleteForm($post);
 
-        return $this->render('admin/post/show.html.twig', array(
+        return $this->render('admin/post/show.html.twig', [
             'post'        => $post,
             'delete_form' => $deleteForm->createView(),
-        ));
+        ]);
     }
 
 Normally, you'd expect a ``$id`` argument to ``showAction()``. Instead, by
@@ -182,7 +182,7 @@ manually. In our application, we have this situation in ``CommentController``::
     {
         $post = $this->getDoctrine()
             ->getRepository(Post::class)
-            ->findOneBy(array('slug' => $postSlug));
+            ->findOneBy(['slug' => $postSlug]);
 
         if (!$post) {
             throw $this->createNotFoundException();
diff --git a/best_practices/forms.rst b/best_practices/forms.rst
index 8c1233196af..5041e604d0d 100644
--- a/best_practices/forms.rst
+++ b/best_practices/forms.rst
@@ -42,9 +42,9 @@ form in its own PHP class::
 
         public function configureOptions(OptionsResolver $resolver)
         {
-            $resolver->setDefaults(array(
+            $resolver->setDefaults([
                 'data_class' => Post::class,
-            ));
+            ]);
         }
     }
 
@@ -96,7 +96,7 @@ scope of that form::
         {
             $builder
                 // ...
-                ->add('save', SubmitType::class, array('label' => 'Create Post'))
+                ->add('save', SubmitType::class, ['label' => 'Create Post'])
             ;
         }
 
@@ -123,10 +123,10 @@ some developers configure form buttons in the controller::
         {
             $post = new Post();
             $form = $this->createForm(PostType::class, $post);
-            $form->add('submit', SubmitType::class, array(
+            $form->add('submit', SubmitType::class, [
                 'label' => 'Create',
-                'attr'  => array('class' => 'btn btn-default pull-right'),
-            ));
+                'attr'  => ['class' => 'btn btn-default pull-right'],
+            ]);
 
             // ...
         }
@@ -215,7 +215,7 @@ Handling a form submit usually follows a similar template::
 
             return $this->redirect($this->generateUrl(
                 'admin_post_show',
-                array('id' => $post->getId())
+                ['id' => $post->getId()]
             ));
         }
 
diff --git a/best_practices/security.rst b/best_practices/security.rst
index 3e18057d02d..6eef4c6cf43 100644
--- a/best_practices/security.rst
+++ b/best_practices/security.rst
@@ -285,7 +285,7 @@ the same ``getAuthorEmail()`` logic you used above::
 
         protected function supports($attribute, $subject)
         {
-            if (!in_array($attribute, array(self::CREATE, self::EDIT))) {
+            if (!in_array($attribute, [self::CREATE, self::EDIT])) {
                 return false;
             }
 
@@ -309,7 +309,7 @@ the same ``getAuthorEmail()`` logic you used above::
             switch ($attribute) {
                 case self::CREATE:
                     // if the user is an admin, allow them to create new posts
-                    if ($this->decisionManager->decide($token, array('ROLE_ADMIN'))) {
+                    if ($this->decisionManager->decide($token, ['ROLE_ADMIN'])) {
                         return true;
                     }
 
diff --git a/best_practices/templates.rst b/best_practices/templates.rst
index 38a88f7610b..6d128aa5a13 100644
--- a/best_practices/templates.rst
+++ b/best_practices/templates.rst
@@ -122,11 +122,11 @@ class in the constructor of the Twig extension::
 
         public function getFilters()
         {
-            return array(
+            return [
                 new TwigFilter(
                     'md2html',
-                    array($this, 'markdownToHtml'),
-                    array('is_safe' => array('html'), 'pre_escape' => 'html')
+                    [$this, 'markdownToHtml'],
+                    ['is_safe' => ['html'], 'pre_escape' => 'html']
                 ),
             );
         }
diff --git a/best_practices/tests.rst b/best_practices/tests.rst
index aef317a5b4f..4a26ee7139c 100644
--- a/best_practices/tests.rst
+++ b/best_practices/tests.rst
@@ -49,14 +49,14 @@ A functional test like this is simple to implement thanks to
 
         public function urlProvider()
         {
-            return array(
-                array('/'),
-                array('/posts'),
-                array('/post/fixture-post-1'),
-                array('/blog/category/fixture-category'),
-                array('/archives'),
+            return [
+                ['/'],
+                ['/posts'],
+                ['/post/fixture-post-1'],
+                ['/blog/category/fixture-category'],
+                ['/archives'],
                 // ...
-            );
+            ];
         }
     }
 
diff --git a/bundles.rst b/bundles.rst
index a4677f8a1fd..43ccbb10111 100644
--- a/bundles.rst
+++ b/bundles.rst
@@ -39,7 +39,7 @@ the ``registerBundles()`` method of the ``AppKernel`` class::
     // app/AppKernel.php
     public function registerBundles()
     {
-        $bundles = array(
+        $bundles = [
             new Symfony\Bundle\FrameworkBundle\FrameworkBundle(),
             new Symfony\Bundle\SecurityBundle\SecurityBundle(),
             new Symfony\Bundle\TwigBundle\TwigBundle(),
@@ -48,9 +48,9 @@ the ``registerBundles()`` method of the ``AppKernel`` class::
             new Symfony\Bundle\DoctrineBundle\DoctrineBundle(),
             new Sensio\Bundle\FrameworkExtraBundle\SensioFrameworkExtraBundle(),
             new AppBundle\AppBundle(),
-        );
+        ];
 
-        if (in_array($this->getEnvironment(), array('dev', 'test'))) {
+        if (in_array($this->getEnvironment(), ['dev', 'test'])) {
             $bundles[] = new Symfony\Bundle\WebProfilerBundle\WebProfilerBundle();
             $bundles[] = new Sensio\Bundle\DistributionBundle\SensioDistributionBundle();
             $bundles[] = new Sensio\Bundle\GeneratorBundle\SensioGeneratorBundle();
@@ -107,12 +107,12 @@ Now that you've created the bundle, enable it via the ``AppKernel`` class::
     // app/AppKernel.php
     public function registerBundles()
     {
-        $bundles = array(
+        $bundles = [
             // ...
 
             // register your bundle
             new Acme\TestBundle\AcmeTestBundle(),
-        );
+        ];
         // ...
 
         return $bundles;
diff --git a/bundles/best_practices.rst b/bundles/best_practices.rst
index 04e00f0ccfb..79607178c0f 100644
--- a/bundles/best_practices.rst
+++ b/bundles/best_practices.rst
@@ -232,10 +232,10 @@ following standardized instructions in your ``README.md`` file.
         {
             public function registerBundles()
             {
-                $bundles = array(
+                $bundles = [
                     // ...
                     new <vendor>\<bundle-name>\<bundle-long-name>(),
-                );
+                ];
 
                 // ...
             }
@@ -278,11 +278,11 @@ following standardized instructions in your ``README.md`` file.
             {
                 public function registerBundles()
                 {
-                    $bundles = array(
+                    $bundles = [
                         // ...
 
                         new <vendor>\<bundle-name>\<bundle-long-name>(),
-                    );
+                    ];
 
                     // ...
                 }
diff --git a/bundles/configuration.rst b/bundles/configuration.rst
index 2d5e830da5d..b7535d55c96 100644
--- a/bundles/configuration.rst
+++ b/bundles/configuration.rst
@@ -39,9 +39,9 @@ as integration of other related components:
 
     .. code-block:: php
 
-        $container->loadFromExtension('framework', array(
+        $container->loadFromExtension('framework', [
             'form' => true,
-        ));
+        ]);
 
 .. sidebar:: Using Parameters to Configure your Bundle
 
@@ -91,10 +91,10 @@ allow users to configure it with some configuration that looks like this:
     .. code-block:: php
 
         // app/config/config.php
-        $container->loadFromExtension('acme_social', array(
+        $container->loadFromExtension('acme_social', [
             'client_id'     => 123,
             'client_secret' => 'your_secret',
-        ));
+        ]);
 
 The basic idea is that instead of having the user override individual
 parameters, you let the user configure just a few, specifically created,
@@ -139,14 +139,14 @@ automatically converts XML and YAML to an array).
 For the configuration example in the previous section, the array passed to your
 ``load()`` method will look like this::
 
-    array(
-        array(
-            'twitter' => array(
+    [
+        [
+            'twitter' => [
                 'client_id' => 123,
                 'client_secret' => 'your_secret',
-            ),
-        ),
-    )
+            ],
+        ],
+    ]
 
 Notice that this is an *array of arrays*, not just a single flat array of the
 configuration values. This is intentional, as it allows Symfony to parse
@@ -154,21 +154,21 @@ several configuration resources. For example, if ``acme_social`` appears in
 another configuration file - say ``config_dev.yml`` - with different values
 beneath it, the incoming array might look like this::
 
-    array(
+    [
         // values from config.yml
-        array(
-            'twitter' => array(
+        [
+            'twitter' => [
                 'client_id' => 123,
                 'client_secret' => 'your_secret',
-            ),
-        ),
+            ],
+        ],
         // values from config_dev.yml
-        array(
-            'twitter' => array(
+        [
+            'twitter' => [
                 'client_id' => 456,
-            ),
-        ),
-    )
+            ],
+        ],
+    ]
 
 The order of the two arrays depends on which one is set first.
 
@@ -315,7 +315,7 @@ In your extension, you can load this and dynamically set its arguments::
 
         public function load(array $configs, ContainerBuilder $container)
         {
-            $config = array();
+            $config = [];
             // let resources override the previous set value
             foreach ($configs as $subConfig) {
                 $config = array_merge($config, $subConfig);
diff --git a/bundles/extension.rst b/bundles/extension.rst
index 51b3e57abed..2daefd2fed6 100644
--- a/bundles/extension.rst
+++ b/bundles/extension.rst
@@ -157,17 +157,17 @@ class names::
         // ...
 
         // this method can't compile classes that contain PHP annotations
-        $this->addClassesToCompile(array(
+        $this->addClassesToCompile([
             UserManager::class,
             Slugger::class,
             // ...
-        ));
+        ]);
 
         // add here only classes that contain PHP annotations
-        $this->addAnnotatedClassesToCompile(array(
+        $this->addAnnotatedClassesToCompile([
             'AppBundle\\Controller\\DefaultController',
             // ...
-        ));
+        ]);
     }
 
 .. note::
@@ -186,15 +186,15 @@ The classes to compile can also be added using file path patterns::
     {
         // ...
 
-        $this->addClassesToCompile(array(
+        $this->addClassesToCompile([
             '**Bundle\\Manager\\',
             // ...
-        ));
+        ]);
 
-        $this->addAnnotatedClassesToCompile(array(
+        $this->addAnnotatedClassesToCompile([
             '**Bundle\\Controller\\',
             // ...
-        ));
+        ]);
     }
 
 Patterns are transformed into the actual class namespaces using the classmap
diff --git a/bundles/installation.rst b/bundles/installation.rst
index 52adbe39fa4..c8f3e4ec1d5 100644
--- a/bundles/installation.rst
+++ b/bundles/installation.rst
@@ -61,10 +61,10 @@ The only thing you need to do now is register the bundle in ``AppKernel``::
 
         public function registerBundles()
         {
-            $bundles = array(
+            $bundles = [
                 // ...
                 new FOS\UserBundle\FOSUserBundle(),
-            );
+            ];
 
             // ...
         }
@@ -85,11 +85,11 @@ and ``test`` environments, register the bundle in this way::
 
         public function registerBundles()
         {
-            $bundles = array(
+            $bundles = [
                 // ...
-            );
+            ];
 
-            if (in_array($this->getEnvironment(), array('dev', 'test'))) {
+            if (in_array($this->getEnvironment(), ['dev', 'test'])) {
                 $bundles[] = new Doctrine\Bundle\FixturesBundle\DoctrineFixturesBundle();
             }
 
diff --git a/bundles/prepend_extension.rst b/bundles/prepend_extension.rst
index 28610a27154..fb9d3e5d470 100644
--- a/bundles/prepend_extension.rst
+++ b/bundles/prepend_extension.rst
@@ -64,7 +64,7 @@ in case a specific other bundle is not registered::
         // determine if AcmeGoodbyeBundle is registered
         if (!isset($bundles['AcmeGoodbyeBundle'])) {
             // disable AcmeGoodbyeBundle in bundles
-            $config = array('use_acme_goodbye' => false);
+            $config = ['use_acme_goodbye' => false];
             foreach ($container->getExtensions() as $name => $extension) {
                 switch ($name) {
                     case 'acme_something':
@@ -90,7 +90,7 @@ in case a specific other bundle is not registered::
         // check if entity_manager_name is set in the "acme_hello" configuration
         if (isset($config['entity_manager_name'])) {
             // prepend the acme_something settings with the entity_manager_name
-            $config = array('entity_manager_name' => $config['entity_manager_name']);
+            $config = ['entity_manager_name' => $config['entity_manager_name']];
             $container->prependExtensionConfig('acme_something', $config);
         }
     }
@@ -135,15 +135,15 @@ The above would be the equivalent of writing the following into the
     .. code-block:: php
 
         // app/config/config.php
-        $container->loadFromExtension('acme_something', array(
+        $container->loadFromExtension('acme_something', [
             // ...
             'use_acme_goodbye' => false,
             'entity_manager_name' => 'non_default',
-        ));
-        $container->loadFromExtension('acme_other', array(
+        ]);
+        $container->loadFromExtension('acme_other', [
             // ...
             'use_acme_goodbye' => false,
-        ));
+        ]);
 
 More than one Bundle using PrependExtensionInterface
 ----------------------------------------------------
diff --git a/bundles/remove.rst b/bundles/remove.rst
index 644e8742310..0c27eacb68b 100644
--- a/bundles/remove.rst
+++ b/bundles/remove.rst
@@ -19,11 +19,11 @@ bundle is only registered in the development environment::
     {
         public function registerBundles()
         {
-            $bundles = array(
+            $bundles = [
                 new Acme\DemoBundle\AcmeDemoBundle(),
-            );
+            ];
 
-            if (in_array($this->getEnvironment(), array('dev', 'test'))) {
+            if (in_array($this->getEnvironment(), ['dev', 'test'])) {
                 // comment or remove this line:
                 // $bundles[] = new Acme\DemoBundle\AcmeDemoBundle();
                 // ...
diff --git a/components/asset.rst b/components/asset.rst
index 7d26723e363..b550f2ed036 100644
--- a/components/asset.rst
+++ b/components/asset.rst
@@ -292,10 +292,10 @@ constructor::
     use Symfony\Component\Asset\UrlPackage;
     // ...
 
-    $urls = array(
+    $urls = [
         '//static1.example.com/images/',
         '//static2.example.com/images/',
-    );
+    ];
     $urlPackage = new UrlPackage($urls, new StaticVersionStrategy('v1'));
 
     echo $urlPackage->getUrl('/logo.png');
@@ -320,7 +320,7 @@ protocol-relative URLs for HTTPs requests, any base URL for HTTP requests)::
     // ...
 
     $urlPackage = new UrlPackage(
-        array('http://example.com/', 'https://example.com/'),
+        ['http://example.com/', 'https://example.com/'],
         new StaticVersionStrategy('v1'),
         new RequestStackContext($requestStack)
     );
@@ -350,10 +350,10 @@ they all have different base paths::
 
     $defaultPackage = new Package($versionStrategy);
 
-    $namedPackages = array(
+    $namedPackages = [
         'img' => new UrlPackage('http://img.example.com/', $versionStrategy),
         'doc' => new PathPackage('/somewhere/deep/for/documents', $versionStrategy),
-    );
+    ];
 
     $packages = new Packages($defaultPackage, $namedPackages);
 
diff --git a/components/browser_kit.rst b/components/browser_kit.rst
index bab848c82c5..81bd04f01b6 100644
--- a/components/browser_kit.rst
+++ b/components/browser_kit.rst
@@ -207,7 +207,7 @@ into the client constructor::
     $cookieJar->set($cookie);
 
     // create a client and set the cookies
-    $client = new Client(array(), null, $cookieJar);
+    $client = new Client([], null, $cookieJar);
     // ...
 
 History
diff --git a/components/cache.rst b/components/cache.rst
index af113fa4592..4557988c726 100644
--- a/components/cache.rst
+++ b/components/cache.rst
@@ -89,20 +89,20 @@ Now you can create, retrieve, update and delete items using this object::
 
 You can also work with multiple items at once::
 
-    $cache->setMultiple(array(
+    $cache->setMultiple([
         'stats.products_count' => 4711,
         'stats.users_count' => 1356,
-    ));
+    ]);
 
-    $stats = $cache->getMultiple(array(
+    $stats = $cache->getMultiple([
         'stats.products_count',
         'stats.users_count',
-    ));
+    ]);
 
-    $cache->deleteMultiple(array(
+    $cache->deleteMultiple([
         'stats.products_count',
         'stats.users_count',
-    ));
+    ]);
 
 Available Simple Cache (PSR-16) Classes
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
diff --git a/components/cache/adapters/chain_adapter.rst b/components/cache/adapters/chain_adapter.rst
index faff4dc6859..c1ad7630565 100644
--- a/components/cache/adapters/chain_adapter.rst
+++ b/components/cache/adapters/chain_adapter.rst
@@ -17,14 +17,14 @@ lifetime as its constructor arguments::
 
     use Symfony\Component\Cache\Adapter\ApcuAdapter;
 
-    $cache = new ChainAdapter(array(
+    $cache = new ChainAdapter([
 
         // The ordered list of adapters used to fetch cached items
         array $adapters,
 
         // The max lifetime of items propagated from lower adapters to upper ones
         $maxLifetime = 0
-    ));
+    ]);
 
 .. note::
 
@@ -40,10 +40,10 @@ slowest storage engines, :class:`Symfony\\Component\\Cache\\Adapter\\ApcuAdapter
     use Symfony\Component\Cache\Adapter\ChainAdapter;
     use Symfony\Component\Cache\Adapter\FilesystemAdapter;
 
-    $cache = new ChainAdapter(array(
+    $cache = new ChainAdapter([
         new ApcuAdapter(),
         new FilesystemAdapter(),
-    ));
+    ]);
 
 When calling this adapter's :method:`Symfony\\Component\\Cache\\ChainAdapter::prune` method,
 the call is delegated to all its compatible cache adapters. It is safe to mix both adapters
@@ -54,10 +54,10 @@ incompatible adapters are silently ignored::
     use Symfony\Component\Cache\Adapter\ChainAdapter;
     use Symfony\Component\Cache\Adapter\FilesystemAdapter;
 
-    $cache = new ChainAdapter(array(
+    $cache = new ChainAdapter([
         new ApcuAdapter(),        // does NOT implement PruneableInterface
         new FilesystemAdapter(),  // DOES implement PruneableInterface
-    ));
+    ]);
 
     // prune will proxy the call to FilesystemAdapter while silently skipping ApcuAdapter
     $cache->prune();
diff --git a/components/cache/adapters/memcached_adapter.rst b/components/cache/adapters/memcached_adapter.rst
index f5eb8935774..10f2b43aee2 100644
--- a/components/cache/adapters/memcached_adapter.rst
+++ b/components/cache/adapters/memcached_adapter.rst
@@ -61,12 +61,12 @@ helper method allows creating and configuring a `Memcached`_ class instance usin
     );
 
     // pass an array of DSN strings to register multiple servers with the client
-    $client = MemcachedAdapter::createConnection(array(
+    $client = MemcachedAdapter::createConnection([
         'memcached://10.0.0.100',
         'memcached://10.0.0.101',
         'memcached://10.0.0.102',
         // etc...
-    ));
+    ]);
 
 .. versionadded:: 3.4
 
@@ -90,7 +90,7 @@ Below are common examples of valid DSNs showing a combination of available value
 
     use Symfony\Component\Cache\Adapter\MemcachedAdapter;
 
-    $client = MemcachedAdapter::createConnection(array(
+    $client = MemcachedAdapter::createConnection([
         // hostname + port
         'memcached://my.server.com:11211'
 
@@ -105,7 +105,7 @@ Below are common examples of valid DSNs showing a combination of available value
 
         // socket instead of hostname/IP + weight
         'memcached:///var/run/memcached.sock?weight=20'
-    ));
+    ]);
 
 Configure the Options
 ---------------------
@@ -119,14 +119,14 @@ option names and their respective values::
 
     $client = MemcachedAdapter::createConnection(
         // a DSN string or an array of DSN strings
-        array(),
+        [],
 
         // associative array of configuration options
-        array(
+        [
             'compression' => true,
             'libketama_compatible' => true,
             'serializer' => 'igbinary',
-         )
+        ]
     );
 
 Available Options
diff --git a/components/cache/adapters/pdo_doctrine_dbal_adapter.rst b/components/cache/adapters/pdo_doctrine_dbal_adapter.rst
index 6ba9eb8f0b4..bbbf9507e82 100644
--- a/components/cache/adapters/pdo_doctrine_dbal_adapter.rst
+++ b/components/cache/adapters/pdo_doctrine_dbal_adapter.rst
@@ -32,7 +32,7 @@ third, and forth parameters::
         $defaultLifetime = 0,
 
         // an array of options for configuring the database table and connection
-        $options = array()
+        $options = []
     );
 
 .. tip::
diff --git a/components/cache/adapters/php_array_cache_adapter.rst b/components/cache/adapters/php_array_cache_adapter.rst
index 22dc93b6a4f..dfc29f62002 100644
--- a/components/cache/adapters/php_array_cache_adapter.rst
+++ b/components/cache/adapters/php_array_cache_adapter.rst
@@ -14,10 +14,10 @@ that is optimized and preloaded into OPcache memory storage::
     // somehow, decide it's time to warm up the cache!
     if ($needsWarmup) {
         // some static values
-        $values = array(
+        $values = [
             'stats.products_count' => 4711,
             'stats.users_count' => 1356,
-        );
+        ];
 
         $cache = new PhpArrayAdapter(
             // single file where values are cached
diff --git a/components/cache/adapters/php_files_adapter.rst b/components/cache/adapters/php_files_adapter.rst
index 1b223f118bc..078394aeaf0 100644
--- a/components/cache/adapters/php_files_adapter.rst
+++ b/components/cache/adapters/php_files_adapter.rst
@@ -10,22 +10,22 @@ Php Files Cache Adapter
 Similarly to :ref:`Filesystem Adapter <component-cache-filesystem-adapter>`, this cache
 implementation writes cache entries out to disk, but unlike the Filesystem cache adapter,
 the PHP Files cache adapter writes and reads back these cache files *as native PHP code*.
-For example, caching the value ``array('my', 'cached', 'array')`` will write out a cache
+For example, caching the value ``['my', 'cached', 'array']`` will write out a cache
 file similar to the following::
 
-    <?php return array(
+    <?php return [
 
         // the cache item expiration
         0 => 9223372036854775807,
 
         // the cache item contents
-        1 => array (
+        1 => [
             0 => 'my',
             1 => 'cached',
             2 => 'array',
-        ),
+        ],
 
-    );
+    ];
 
 .. note::
 
diff --git a/components/cache/adapters/redis_adapter.rst b/components/cache/adapters/redis_adapter.rst
index 93b6b48426c..f85fe2081ea 100644
--- a/components/cache/adapters/redis_adapter.rst
+++ b/components/cache/adapters/redis_adapter.rst
@@ -95,14 +95,14 @@ array of ``key => value`` pairs representing option names and their respective v
         'redis://localhost:6379',
 
         // associative array of configuration options
-        array(
+        [
             'lazy' => false,
             'persistent' => 0,
             'persistent_id' => null,
             'timeout' => 30,
             'read_timeout' => 0,
             'retry_interval' => 0,
-         )
+        ]
 
     );
 
diff --git a/components/cache/cache_invalidation.rst b/components/cache/cache_invalidation.rst
index 5639663c4d6..ab78d8e5b49 100644
--- a/components/cache/cache_invalidation.rst
+++ b/components/cache/cache_invalidation.rst
@@ -36,7 +36,7 @@ cache items, as returned by cache adapters::
     // ...
     // add one or more tags
     $item->tag('tag_1');
-    $item->tag(array('tag_2', 'tag_3'));
+    $item->tag(['tag_2', 'tag_3']);
     $cache->save($item);
 
 If ``$cache`` implements :class:`Symfony\\Component\\Cache\\Adapter\\TagAwareAdapterInterface`,
@@ -44,7 +44,7 @@ you can invalidate the cached items by calling
 :method:`Symfony\\Component\\Cache\\Adapter\\TagAwareAdapterInterface::invalidateTags`::
 
     // invalidate all items related to `tag_1` or `tag_3`
-    $cache->invalidateTags(array('tag_1', 'tag_3'));
+    $cache->invalidateTags(['tag_1', 'tag_3']);
 
     // if you know the cache key, you can also delete the item directly
     $cache->deleteItem('cache_key');
diff --git a/components/cache/cache_items.rst b/components/cache/cache_items.rst
index 1e9a6f7a76e..a9c0246ea75 100644
--- a/components/cache/cache_items.rst
+++ b/components/cache/cache_items.rst
@@ -41,10 +41,10 @@ the data stored in the cache item::
     $cache->save($productsCount);
 
     // storing an array
-    $productsCount->set(array(
+    $productsCount->set([
         'category1' => 4711,
         'category2' => 2387,
-    ));
+    ]);
     $cache->save($productsCount);
 
 The key and the value of any given cache item can be obtained with the
diff --git a/components/cache/cache_pools.rst b/components/cache/cache_pools.rst
index 6d59229a37a..45bc9e38f53 100644
--- a/components/cache/cache_pools.rst
+++ b/components/cache/cache_pools.rst
@@ -51,10 +51,10 @@ value but an empty object which implements the :class:`Symfony\\Component\\Cache
 class.
 
 If you need to fetch several cache items simultaneously, use instead the
-``getItems(array($key1, $key2, ...))`` method::
+``getItems([$key1, $key2, ...])`` method::
 
     // ...
-    $stocks = $cache->getItems(array('AAPL', 'FB', 'GOOGL', 'MSFT'));
+    $stocks = $cache->getItems(['AAPL', 'FB', 'GOOGL', 'MSFT']);
 
 Again, if any of the keys doesn't represent a valid cache item, you won't get
 a ``null`` value but an empty ``CacheItem`` object.
@@ -115,7 +115,7 @@ delete several cache items simultaneously (it returns ``true`` only if all the
 items have been deleted, even when any or some of them don't exist)::
 
     // ...
-    $areDeleted = $cache->deleteItems(array('category1', 'category2'));
+    $areDeleted = $cache->deleteItems(['category1', 'category2']);
 
 Finally, to remove all the cache items stored in the pool, use the
 ``Psr\\Cache\\CacheItemPoolInterface::clear`` method (which returns ``true``
@@ -190,13 +190,13 @@ silently ignored)::
     use Symfony\Component\Cache\Adapter\PdoAdapter;
     use Symfony\Component\Cache\Adapter\PhpFilesAdapter;
 
-    $cache = new ChainAdapter(array(
+    $cache = new ChainAdapter([
         new ApcuAdapter(),       // does NOT implement PruneableInterface
         new FilesystemAdapter(), // DOES implement PruneableInterface
         new PdoAdapter(),        // DOES implement PruneableInterface
         new PhpFilesAdapter(),   // DOES implement PruneableInterface
         // ...
-    ));
+    ]);
 
     // prune will proxy the call to PdoAdapter, FilesystemAdapter and PhpFilesAdapter,
     // while silently skipping ApcuAdapter
diff --git a/components/class_loader/class_loader.rst b/components/class_loader/class_loader.rst
index c6d37661a84..0562722ba58 100644
--- a/components/class_loader/class_loader.rst
+++ b/components/class_loader/class_loader.rst
@@ -41,29 +41,29 @@ your classes::
     $loader->addPrefix('Symfony', __DIR__.'/vendor/symfony/symfony/src');
 
     // registers several namespaces at once
-    $loader->addPrefixes(array(
+    $loader->addPrefixes([
         'Symfony' => __DIR__.'/../vendor/symfony/symfony/src',
         'Monolog' => __DIR__.'/../vendor/monolog/monolog/src',
-    ));
+    ]);
 
     // registers a prefix for a class following the PEAR naming conventions
     $loader->addPrefix('Twig_', __DIR__.'/vendor/twig/twig/lib');
 
-    $loader->addPrefixes(array(
+    $loader->addPrefixes([
         'Swift_' => __DIR__.'/vendor/swiftmailer/swiftmailer/lib/classes',
         'Twig_'  => __DIR__.'/vendor/twig/twig/lib',
-    ));
+    ]);
 
 Classes from a sub-namespace or a sub-hierarchy of `PEAR`_ classes can be
 looked for in a location list to ease the vendoring of a sub-set of classes
 for large projects::
 
-    $loader->addPrefixes(array(
+    $loader->addPrefixes([
         'Doctrine\Common'          => __DIR__.'/vendor/doctrine/common/lib',
         'Doctrine\DBAL\Migrations' => __DIR__.'/vendor/doctrine/migrations/lib',
         'Doctrine\DBAL'            => __DIR__.'/vendor/doctrine/dbal/lib',
         'Doctrine'                 => __DIR__.'/vendor/doctrine/orm/lib',
-    ));
+    ]);
 
 In this example, if you try to use a class in the ``Doctrine\Common`` namespace
 or one of its children, the autoloader will first look for the class under
diff --git a/components/class_loader/class_map_generator.rst b/components/class_loader/class_map_generator.rst
index c060cc71a72..9069e1df960 100644
--- a/components/class_loader/class_map_generator.rst
+++ b/components/class_loader/class_map_generator.rst
@@ -119,7 +119,7 @@ is the same as in the example above)::
     use Symfony\Component\ClassLoader\ClassMapGenerator;
 
     ClassMapGenerator::dump(
-        array(__DIR__.'/library/bar', __DIR__.'/library/foo'),
+        [__DIR__.'/library/bar', __DIR__.'/library/foo'],
         __DIR__.'/class_map.php'
     );
 
diff --git a/components/class_loader/map_class_loader.rst b/components/class_loader/map_class_loader.rst
index e6e464e771e..5f2e8cfab7a 100644
--- a/components/class_loader/map_class_loader.rst
+++ b/components/class_loader/map_class_loader.rst
@@ -29,10 +29,10 @@ an instance of the ``MapClassLoader`` class::
 
     require_once '/path/to/src/Symfony/Component/ClassLoader/MapClassLoader.php';
 
-    $mapping = array(
+    $mapping = [
         'Foo' => '/path/to/Foo',
         'Bar' => '/path/to/Bar',
-    );
+    ];
 
     $loader = new MapClassLoader($mapping);
 
diff --git a/components/config/caching.rst b/components/config/caching.rst
index 99cd4f6a2b1..9ef987a3165 100644
--- a/components/config/caching.rst
+++ b/components/config/caching.rst
@@ -35,7 +35,7 @@ should be regenerated::
         // fill this with an array of 'users.yml' file paths
         $yamlUserFiles = ...;
 
-        $resources = array();
+        $resources = [];
 
         foreach ($yamlUserFiles as $yamlUserFile) {
             // see the article "Loading resources" to
diff --git a/components/config/definition.rst b/components/config/definition.rst
index 27c0f2cb4d5..87119092e21 100644
--- a/components/config/definition.rst
+++ b/components/config/definition.rst
@@ -143,7 +143,7 @@ values::
     $rootNode
         ->children()
             ->enumNode('delivery')
-                ->values(array('standard', 'expedited', 'priority'))
+                ->values(['standard', 'expedited', 'priority'])
             ->end()
         ->end()
     ;
@@ -509,9 +509,9 @@ methods::
     // is equivalent to
 
     $arrayNode
-        ->treatFalseLike(array('enabled' => false))
-        ->treatTrueLike(array('enabled' => true))
-        ->treatNullLike(array('enabled' => true))
+        ->treatFalseLike(['enabled' => false])
+        ->treatTrueLike(['enabled' => true])
+        ->treatNullLike(['enabled' => true])
         ->children()
             ->booleanNode('enabled')
                 ->defaultFalse()
@@ -742,7 +742,7 @@ By changing a string value into an associative array with ``name`` as the key::
             ->arrayNode('connection')
                 ->beforeNormalization()
                     ->ifString()
-                    ->then(function ($v) { return array('name' => $v); })
+                    ->then(function ($v) { return ['name' => $v]; })
                 ->end()
                 ->children()
                     ->scalarNode('name')->isRequired()
@@ -767,7 +767,7 @@ The builder is used for adding advanced validation rules to node definitions, li
                     ->scalarNode('driver')
                         ->isRequired()
                         ->validate()
-                            ->ifNotInArray(array('mysql', 'sqlite', 'mssql'))
+                            ->ifNotInArray(['mysql', 'sqlite', 'mssql'])
                             ->thenInvalid('Invalid database driver %s')
                         ->end()
                     ->end()
@@ -820,7 +820,7 @@ Otherwise the result is a clean array of configuration values::
         file_get_contents(__DIR__.'/src/Matthias/config/config_extra.yml')
     );
 
-    $configs = array($config, $extraConfig);
+    $configs = [$config, $extraConfig];
 
     $processor = new Processor();
     $databaseConfiguration = new DatabaseConfiguration();
diff --git a/components/config/resources.rst b/components/config/resources.rst
index 9b464a6a0cc..db38b6f5e71 100644
--- a/components/config/resources.rst
+++ b/components/config/resources.rst
@@ -19,7 +19,7 @@ files. This can be done with the :class:`Symfony\\Component\\Config\\FileLocator
 
     use Symfony\Component\Config\FileLocator;
 
-    $configDirectories = array(__DIR__.'/app/config');
+    $configDirectories = [__DIR__.'/app/config'];
 
     $fileLocator = new FileLocator($configDirectories);
     $yamlUserFiles = $fileLocator->locate('users.yml', null, false);
@@ -84,7 +84,7 @@ the resource::
     use Symfony\Component\Config\Loader\LoaderResolver;
     use Symfony\Component\Config\Loader\DelegatingLoader;
 
-    $loaderResolver = new LoaderResolver(array(new YamlUserLoader($fileLocator)));
+    $loaderResolver = new LoaderResolver([new YamlUserLoader($fileLocator)]);
     $delegatingLoader = new DelegatingLoader($loaderResolver);
 
     // YamlUserLoader is used to load this resource because it supports
diff --git a/components/console/console_arguments.rst b/components/console/console_arguments.rst
index 0757cf051fb..d49b34701d7 100644
--- a/components/console/console_arguments.rst
+++ b/components/console/console_arguments.rst
@@ -29,11 +29,11 @@ Have a look at the following command that has three options::
                 ->setName('demo:args')
                 ->setDescription('Describe args behaviors')
                 ->setDefinition(
-                    new InputDefinition(array(
+                    new InputDefinition([
                         new InputOption('foo', 'f'),
                         new InputOption('bar', 'b', InputOption::VALUE_REQUIRED),
                         new InputOption('cat', 'c', InputOption::VALUE_OPTIONAL),
-                    ))
+                    ])
                 );
         }
 
@@ -69,10 +69,10 @@ argument::
 
     // ...
 
-    new InputDefinition(array(
+    new InputDefinition([
         // ...
         new InputArgument('arg', InputArgument::OPTIONAL),
-    ));
+    ]);
 
 You might have to use the special ``--`` separator to separate options from
 arguments. Have a look at the fifth example in the following table where it
diff --git a/components/console/helpers/formatterhelper.rst b/components/console/helpers/formatterhelper.rst
index 98f2ad87f93..6c1a91af8c4 100644
--- a/components/console/helpers/formatterhelper.rst
+++ b/components/console/helpers/formatterhelper.rst
@@ -50,7 +50,7 @@ notice that the background is only as long as each individual line. Use the
 :method:`Symfony\\Component\\Console\\Helper\\FormatterHelper::formatBlock`
 to generate a block output::
 
-    $errorMessages = array('Error!', 'Something went wrong');
+    $errorMessages = ['Error!', 'Something went wrong'];
     $formattedBlock = $formatter->formatBlock($errorMessages, 'error');
     $output->writeln($formattedBlock);
 
diff --git a/components/console/helpers/processhelper.rst b/components/console/helpers/processhelper.rst
index 7fa01ab884c..5fba8efc819 100644
--- a/components/console/helpers/processhelper.rst
+++ b/components/console/helpers/processhelper.rst
@@ -14,7 +14,7 @@ a very verbose verbosity (e.g. -vv)::
     use Symfony\Component\Process\Process;
 
     $helper = $this->getHelper('process');
-    $process = new Process(array('figlet', 'Symfony'));
+    $process = new Process(['figlet', 'Symfony']);
 
     $helper->run($output, $process);
 
@@ -43,7 +43,7 @@ There are three ways to use the process helper:
 * An array of arguments::
 
     // ...
-    $helper->run($output, array('figlet', 'Symfony'));
+    $helper->run($output, ['figlet', 'Symfony']);
 
   .. note::
 
@@ -55,7 +55,7 @@ There are three ways to use the process helper:
     use Symfony\Component\Process\Process;
 
     // ...
-    $process = new Process(array('figlet', 'Symfony'));
+    $process = new Process(['figlet', 'Symfony']);
 
     $helper->run($output, $process);
 
diff --git a/components/console/helpers/progressbar.rst b/components/console/helpers/progressbar.rst
index aa1aa53ea21..a309885dc96 100644
--- a/components/console/helpers/progressbar.rst
+++ b/components/console/helpers/progressbar.rst
@@ -324,7 +324,7 @@ The ``setMessage()`` method accepts a second optional argument to set the value
 of the custom placeholders::
 
     // ...
-    // $files = array('client-001/invoices.xml', '...');
+    // $files = ['client-001/invoices.xml', '...'];
     foreach ($files as $filename) {
         $progressBar->setMessage('Importing invoices...');
         $progressBar->setMessage($filename, 'filename');
diff --git a/components/console/helpers/questionhelper.rst b/components/console/helpers/questionhelper.rst
index 95061082f75..279bd53c601 100644
--- a/components/console/helpers/questionhelper.rst
+++ b/components/console/helpers/questionhelper.rst
@@ -105,7 +105,7 @@ from a predefined list::
         $helper = $this->getHelper('question');
         $question = new ChoiceQuestion(
             'Please select your favorite color (defaults to red)',
-            array('red', 'blue', 'yellow'),
+            ['red', 'blue', 'yellow'],
             0
         );
         $question->setErrorMessage('Color %s is invalid.');
@@ -143,7 +143,7 @@ this use :method:`Symfony\\Component\\Console\\Question\\ChoiceQuestion::setMult
         $helper = $this->getHelper('question');
         $question = new ChoiceQuestion(
             'Please select your favorite colors (defaults to red and blue)',
-            array('red', 'blue', 'yellow'),
+            ['red', 'blue', 'yellow'],
             '0,1'
         );
         $question->setMultiselect(true);
@@ -172,7 +172,7 @@ will be autocompleted as the user types::
         // ...
         $helper = $this->getHelper('question');
 
-        $bundles = array('AcmeDemoBundle', 'AcmeBlogBundle', 'AcmeStoreBundle');
+        $bundles = ['AcmeDemoBundle', 'AcmeBlogBundle', 'AcmeStoreBundle'];
         $question = new Question('Please enter the name of a bundle', 'FooBundle');
         $question->setAutocompleterValues($bundles);
 
@@ -355,17 +355,17 @@ from the command line, you need to set the inputs that the command expects::
         $commandTester = new CommandTester($command);
 
         // Equals to a user inputting "Test" and hitting ENTER
-        $commandTester->setInputs(array('Test'));
+        $commandTester->setInputs(['Test']);
 
         // Equals to a user inputting "This", "That" and hitting ENTER
         // This can be used for answering two separated questions for instance
-        $commandTester->setInputs(array('This', 'That'));
+        $commandTester->setInputs(['This', 'That']);
 
         // For simulating a positive answer to a confirmation question, adding an
         // additional input saying "yes" will work
-        $commandTester->setInputs(array('yes'));
+        $commandTester->setInputs(['yes']);
 
-        $commandTester->execute(array('command' => $command->getName()));
+        $commandTester->execute(['command' => $command->getName()]);
 
         // $this->assertRegExp('/.../', $commandTester->getDisplay());
     }
diff --git a/components/console/helpers/table.rst b/components/console/helpers/table.rst
index ec532ab4560..fd242981f1f 100644
--- a/components/console/helpers/table.rst
+++ b/components/console/helpers/table.rst
@@ -32,13 +32,13 @@ set the headers, set the rows and then render the table::
         {
             $table = new Table($output);
             $table
-                ->setHeaders(array('ISBN', 'Title', 'Author'))
-                ->setRows(array(
-                    array('99921-58-10-7', 'Divine Comedy', 'Dante Alighieri'),
-                    array('9971-5-0210-0', 'A Tale of Two Cities', 'Charles Dickens'),
-                    array('960-425-059-0', 'The Lord of the Rings', 'J. R. R. Tolkien'),
-                    array('80-902734-1-6', 'And Then There Were None', 'Agatha Christie'),
-                ))
+                ->setHeaders(['ISBN', 'Title', 'Author'])
+                ->setRows([
+                    ['99921-58-10-7', 'Divine Comedy', 'Dante Alighieri'],
+                    ['9971-5-0210-0', 'A Tale of Two Cities', 'Charles Dickens'],
+                    ['960-425-059-0', 'The Lord of the Rings', 'J. R. R. Tolkien'],
+                    ['80-902734-1-6', 'And Then There Were None', 'Agatha Christie'],
+                ])
             ;
             $table->render();
         }
@@ -49,13 +49,13 @@ You can add a table separator anywhere in the output by passing an instance of
 
     use Symfony\Component\Console\Helper\TableSeparator;
 
-    $table->setRows(array(
-        array('99921-58-10-7', 'Divine Comedy', 'Dante Alighieri'),
-        array('9971-5-0210-0', 'A Tale of Two Cities', 'Charles Dickens'),
+    $table->setRows([
+        ['99921-58-10-7', 'Divine Comedy', 'Dante Alighieri'],
+        ['9971-5-0210-0', 'A Tale of Two Cities', 'Charles Dickens'],
         new TableSeparator(),
-        array('960-425-059-0', 'The Lord of the Rings', 'J. R. R. Tolkien'),
-        array('80-902734-1-6', 'And Then There Were None', 'Agatha Christie'),
-    ));
+        ['960-425-059-0', 'The Lord of the Rings', 'J. R. R. Tolkien'],
+        ['80-902734-1-6', 'And Then There Were None', 'Agatha Christie'],
+    ]);
 
 .. code-block:: terminal
 
@@ -74,7 +74,7 @@ contents. Use the :method:`Symfony\\Component\\Console\\Helper\\Table::setColumn
 method to set the column widths explicitly::
 
     // ...
-    $table->setColumnWidths(array(10, 0, 30));
+    $table->setColumnWidths([10, 0, 30]);
     $table->render();
 
 In this example, the first column width will be ``10``, the last column width
@@ -197,12 +197,12 @@ To make a table cell that spans multiple columns you can use a :class:`Symfony\\
 
     $table = new Table($output);
     $table
-        ->setHeaders(array('ISBN', 'Title', 'Author'))
-        ->setRows(array(
-            array('99921-58-10-7', 'Divine Comedy', 'Dante Alighieri'),
+        ->setHeaders(['ISBN', 'Title', 'Author'])
+        ->setRows([
+            ['99921-58-10-7', 'Divine Comedy', 'Dante Alighieri'],
             new TableSeparator(),
-            array(new TableCell('This value spans 3 columns.', array('colspan' => 3))),
-        ))
+            [new TableCell('This value spans 3 columns.', ['colspan' => 3])],
+        ])
     ;
     $table->render();
 
@@ -223,9 +223,9 @@ This results in:
     You can create a multiple-line page title using a header cell that spans
     the entire table width::
 
-        $table->setHeaders(array(
-            array(new TableCell('Main table title', array('colspan' => 3))),
-            array('ISBN', 'Title', 'Author'),
+        $table->setHeaders([
+            [new TableCell('Main table title', ['colspan' => 3])],
+            ['ISBN', 'Title', 'Author'],
         ))
         // ...
 
@@ -248,15 +248,15 @@ In a similar way you can span multiple rows::
 
     $table = new Table($output);
     $table
-        ->setHeaders(array('ISBN', 'Title', 'Author'))
-        ->setRows(array(
-            array(
+        ->setHeaders(['ISBN', 'Title', 'Author'])
+        ->setRows([
+            [
                 '978-0521567817',
                 'De Monarchia',
-                new TableCell("Dante Alighieri\nspans multiple rows", array('rowspan' => 2)),
-            ),
-            array('978-0804169127', 'Divine Comedy'),
-        ))
+                new TableCell("Dante Alighieri\nspans multiple rows", ['rowspan' => 2]),
+            ],
+            ['978-0804169127', 'Divine Comedy'],
+        ])
     ;
     $table->render();
 
diff --git a/components/console/logger.rst b/components/console/logger.rst
index e38438664f9..3d129f7aa3b 100644
--- a/components/console/logger.rst
+++ b/components/console/logger.rst
@@ -83,10 +83,11 @@ constructor::
     use Psr\Log\LogLevel;
     // ...
 
-    $verbosityLevelMap = array(
+    $verbosityLevelMap = [
         LogLevel::NOTICE => OutputInterface::VERBOSITY_NORMAL,
         LogLevel::INFO   => OutputInterface::VERBOSITY_NORMAL,
-    );
+    ];
+
     $logger = new ConsoleLogger($output, $verbosityLevelMap);
 
 Color
@@ -97,11 +98,12 @@ level. This behavior is configurable through the third parameter of the
 constructor::
 
     // ...
-    $formatLevelMap = array(
+    $formatLevelMap = [
         LogLevel::CRITICAL => ConsoleLogger::ERROR,
         LogLevel::DEBUG    => ConsoleLogger::INFO,
-    );
-    $logger = new ConsoleLogger($output, array(), $formatLevelMap);
+    ];
+
+    $logger = new ConsoleLogger($output, [], $formatLevelMap);
 
 Errors
 ------
diff --git a/components/dependency_injection.rst b/components/dependency_injection.rst
index 5c979c94b96..5023314048d 100644
--- a/components/dependency_injection.rst
+++ b/components/dependency_injection.rst
@@ -159,7 +159,7 @@ If you do want to though then the container can call the setter method::
 
     $containerBuilder
         ->register('newsletter_manager', 'NewsletterManager')
-        ->addMethodCall('setMailer', array(new Reference('mailer')));
+        ->addMethodCall('setMailer', [new Reference('mailer')]);
 
 You could then get your ``newsletter_manager`` service from the container
 like this::
@@ -300,7 +300,7 @@ config files:
 
         $container
             ->register('newsletter_manager', 'NewsletterManager')
-            ->addMethodCall('setMailer', array(new Reference('mailer')));
+            ->addMethodCall('setMailer', [new Reference('mailer')]);
 
 Learn More
 ----------
diff --git a/components/dependency_injection/compilation.rst b/components/dependency_injection/compilation.rst
index 8b689b7fcae..bd26ddf7521 100644
--- a/components/dependency_injection/compilation.rst
+++ b/components/dependency_injection/compilation.rst
@@ -146,12 +146,12 @@ that was loaded into the container. You are only loading a single config
 file in the above example but it will still be within an array. The array
 will look like this::
 
-    array(
-        array(
+    [
+        [
             'foo' => 'fooValue',
             'bar' => 'barValue',
-        ),
-    )
+        ],
+    ]
 
 Whilst you can manually manage merging the different files, it is much better
 to use :doc:`the Config component </components/config>` to
@@ -490,7 +490,7 @@ dump it::
         $dumper = new PhpDumper($containerBuilder);
         file_put_contents(
             $file,
-            $dumper->dump(array('class' => 'MyCachedContainer'))
+            $dumper->dump(['class' => 'MyCachedContainer'])
         );
     }
 
@@ -523,7 +523,7 @@ application::
             $dumper = new PhpDumper($containerBuilder);
             file_put_contents(
                 $file,
-                $dumper->dump(array('class' => 'MyCachedContainer'))
+                $dumper->dump(['class' => 'MyCachedContainer'])
             );
         }
     }
@@ -556,7 +556,7 @@ for these resources and use them as metadata for the cache::
 
         $dumper = new PhpDumper($containerBuilder);
         $containerConfigCache->write(
-            $dumper->dump(array('class' => 'MyCachedContainer')),
+            $dumper->dump(['class' => 'MyCachedContainer']),
             $containerBuilder->getResources()
         );
     }
diff --git a/components/dom_crawler.rst b/components/dom_crawler.rst
index 4288d31d97a..0fa5db13101 100644
--- a/components/dom_crawler.rst
+++ b/components/dom_crawler.rst
@@ -207,7 +207,7 @@ Extract attribute and/or node values from the list of nodes::
 
     $attributes = $crawler
         ->filterXpath('//body/p')
-        ->extract(array('_text', 'class'))
+        ->extract(['_text', 'class'])
     ;
 
 .. note::
@@ -270,7 +270,7 @@ and :phpclass:`DOMNode` objects::
 
     $crawler->addDocument($domDocument);
     $crawler->addNodeList($nodeList);
-    $crawler->addNodes(array($node));
+    $crawler->addNodes([$node]);
     $crawler->addNode($node);
     $crawler->add($domDocument);
 
@@ -428,9 +428,9 @@ form that the button lives in::
     $crawler->filter('.form-vertical')->form();
 
     // or "fill" the form fields with data
-    $form = $crawler->selectButton('my-super-button')->form(array(
+    $form = $crawler->selectButton('my-super-button')->form([
         'name' => 'Ryan',
-    ));
+    ]);
 
 The :class:`Symfony\\Component\\DomCrawler\\Form` object has lots of very
 useful methods for working with forms::
@@ -454,10 +454,10 @@ attribute followed by a query string of all of the form's values.
 You can virtually set and get values on the form::
 
     // sets values on the form internally
-    $form->setValues(array(
+    $form->setValues([
         'registration[username]' => 'symfonyfan',
         'registration[terms]'    => 1,
-    ));
+    ]);
 
     // gets back an array of values - in the "flat" array like above
     $values = $form->getValues();
@@ -477,13 +477,13 @@ To work with multi-dimensional fields::
 Pass an array of values::
 
     // sets a single field
-    $form->setValues(array('multi' => array('value')));
+    $form->setValues(['multi' => ['value']]);
 
     // sets multiple fields at once
-    $form->setValues(array('multi' => array(
+    $form->setValues(['multi' => [
         1             => 'value',
         'dimensional' => 'an other value',
-    )));
+    ]]);
 
 This is great, but it gets better! The ``Form`` object allows you to interact
 with your form like a browser, selecting radio values, ticking checkboxes,
@@ -499,7 +499,7 @@ and uploading files::
     $form['registration[birthday][year]']->select(1984);
 
     // selects many options from a "multiple" select
-    $form['registration[interests]']->select(array('symfony', 'cookies'));
+    $form['registration[interests]']->select(['symfony', 'cookies']);
 
     // fakes a file upload
     $form['registration[photo]']->upload('/path/to/lucas.jpg');
diff --git a/components/event_dispatcher.rst b/components/event_dispatcher.rst
index ef5647bb4a1..077807710a7 100644
--- a/components/event_dispatcher.rst
+++ b/components/event_dispatcher.rst
@@ -141,7 +141,7 @@ A call to the dispatcher's ``addListener()`` method associates any valid
 PHP callable to an event::
 
     $listener = new AcmeListener();
-    $dispatcher->addListener('acme.foo.action', array($listener, 'onFooAction'));
+    $dispatcher->addListener('acme.foo.action', [$listener, 'onFooAction']);
 
 The ``addListener()`` method takes up to three arguments:
 
@@ -214,10 +214,10 @@ determine which instance is passed.
 
         // registers an event listener
         $containerBuilder->register('listener_service_id', \AcmeListener::class)
-            ->addTag('kernel.event_listener', array(
+            ->addTag('kernel.event_listener', [
                 'event' => 'acme.foo.action',
                 'method' => 'onFooAction',
-            ));
+            ]);
 
         // registers an event subscriber
         $containerBuilder->register('subscriber_service_id', \AcmeSubscriber::class)
@@ -344,13 +344,13 @@ Take the following example of a subscriber that subscribes to the
     {
         public static function getSubscribedEvents()
         {
-            return array(
-                KernelEvents::RESPONSE => array(
-                    array('onKernelResponsePre', 10),
-                    array('onKernelResponsePost', -10),
-                ),
+            return [
+                KernelEvents::RESPONSE => [
+                    ['onKernelResponsePre', 10],
+                    ['onKernelResponsePost', -10],
+                ],
                 OrderPlacedEvent::NAME => 'onStoreOrder',
-            );
+            ];
         }
 
         public function onKernelResponsePre(FilterResponseEvent $event)
diff --git a/components/event_dispatcher/container_aware_dispatcher.rst b/components/event_dispatcher/container_aware_dispatcher.rst
index 4954f9a30c0..d894e5a9e5a 100644
--- a/components/event_dispatcher/container_aware_dispatcher.rst
+++ b/components/event_dispatcher/container_aware_dispatcher.rst
@@ -53,9 +53,9 @@ Adding Services
 
 To connect existing service definitions, use the
 :method:`Symfony\\Component\\EventDispatcher\\ContainerAwareEventDispatcher::addListenerService`
-method where the ``$callback`` is an array of ``array($serviceId, $methodName)``::
+method where the ``$callback`` is an array of ``[$serviceId, $methodName]``::
 
-    $dispatcher->addListenerService($eventName, array('foo', 'logListener'));
+    $dispatcher->addListenerService($eventName, ['foo', 'logListener']);
 
 Adding Subscriber Services
 ~~~~~~~~~~~~~~~~~~~~~~~~~~
@@ -81,12 +81,12 @@ The ``EventSubscriberInterface`` is exactly as you would expect::
     {
         public static function getSubscribedEvents()
         {
-            return array(
-                KernelEvents::RESPONSE => array(
-                    array('onKernelResponsePre', 10),
-                    array('onKernelResponsePost', 0),
+            return [
+                KernelEvents::RESPONSE => [
+                    ['onKernelResponsePre', 10],
+                    ['onKernelResponsePost', 0],
                 ),
-                'store.order'     => array('onStoreOrder', 0),
+                'store.order' => ['onStoreOrder', 0],
             );
         }
 
diff --git a/components/event_dispatcher/generic_event.rst b/components/event_dispatcher/generic_event.rst
index 23d37f4de9c..42efd41b902 100644
--- a/components/event_dispatcher/generic_event.rst
+++ b/components/event_dispatcher/generic_event.rst
@@ -72,7 +72,7 @@ access the event arguments::
 
     $event = new GenericEvent(
         $subject,
-        array('type' => 'foo', 'counter' => 0)
+        ['type' => 'foo', 'counter' => 0]
     );
     $dispatcher->dispatch('foo', $event);
 
@@ -92,7 +92,7 @@ Filtering data::
 
     use Symfony\Component\EventDispatcher\GenericEvent;
 
-    $event = new GenericEvent($subject, array('data' => 'Foo'));
+    $event = new GenericEvent($subject, ['data' => 'Foo']);
     $dispatcher->dispatch('foo', $event);
 
     class FooListener
diff --git a/components/expression_language.rst b/components/expression_language.rst
index 66cdac8f63f..1e75bdeb78f 100644
--- a/components/expression_language.rst
+++ b/components/expression_language.rst
@@ -101,9 +101,9 @@ PHP type (including objects)::
 
     var_dump($expressionLanguage->evaluate(
         'fruit.variety',
-        array(
+        [
             'fruit' => $apple,
-        )
+        ]
     ));
 
 This will print "Honeycrisp". For more information, see the :doc:`/components/expression_language/syntax`
diff --git a/components/expression_language/ast.rst b/components/expression_language/ast.rst
index ac1e2b62057..0f15c20647a 100644
--- a/components/expression_language/ast.rst
+++ b/components/expression_language/ast.rst
@@ -21,7 +21,7 @@ method after parsing any expression to get its AST::
     use Symfony\Component\ExpressionLanguage\ExpressionLanguage;
 
     $ast = (new ExpressionLanguage())
-        ->parse('1 + 2', array())
+        ->parse('1 + 2', [])
         ->getNodes()
     ;
 
@@ -41,7 +41,7 @@ method to turn the AST into an array::
     // ...
 
     $astAsArray = (new ExpressionLanguage())
-        ->parse('1 + 2', array())
+        ->parse('1 + 2', [])
         ->getNodes()
         ->toArray()
     ;
diff --git a/components/expression_language/caching.rst b/components/expression_language/caching.rst
index 5bfe6ac38d4..361446a0645 100644
--- a/components/expression_language/caching.rst
+++ b/components/expression_language/caching.rst
@@ -58,7 +58,7 @@ Both ``evaluate()`` and ``compile()`` can handle ``ParsedExpression`` and
     // ...
 
     // the parse() method returns a ParsedExpression
-    $expression = $expressionLanguage->parse('1 + 4', array());
+    $expression = $expressionLanguage->parse('1 + 4', []);
 
     var_dump($expressionLanguage->evaluate($expression)); // prints 5
 
@@ -69,7 +69,7 @@ Both ``evaluate()`` and ``compile()`` can handle ``ParsedExpression`` and
 
     $expression = new SerializedParsedExpression(
         '1 + 4',
-        serialize($expressionLanguage->parse('1 + 4', array())->getNodes())
+        serialize($expressionLanguage->parse('1 + 4', [])->getNodes())
     );
 
     var_dump($expressionLanguage->evaluate($expression)); // prints 5
diff --git a/components/expression_language/extending.rst b/components/expression_language/extending.rst
index 61a7846a767..ec98dcdc089 100644
--- a/components/expression_language/extending.rst
+++ b/components/expression_language/extending.rst
@@ -74,7 +74,7 @@ register::
     {
         public function getFunctions()
         {
-            return array(
+            return [
                 new ExpressionFunction('lowercase', function ($str) {
                     return sprintf('(is_string(%1$s) ? strtolower(%1$s) : %1$s)', $str);
                 }, function ($arguments, $str) {
@@ -84,7 +84,7 @@ register::
 
                     return strtolower($str);
                 }),
-            );
+            ];
         }
     }
 
@@ -111,10 +111,10 @@ or by using the second argument of the constructor::
     use Symfony\Component\ExpressionLanguage\ExpressionLanguage;
 
     // using the constructor
-    $expressionLanguage = new ExpressionLanguage(null, array(
+    $expressionLanguage = new ExpressionLanguage(null, [
         new StringExpressionLanguageProvider(),
         // ...
-    ));
+    ]);
 
     // using registerProvider()
     $expressionLanguage->registerProvider(new StringExpressionLanguageProvider());
@@ -129,7 +129,7 @@ or by using the second argument of the constructor::
 
         class ExpressionLanguage extends BaseExpressionLanguage
         {
-            public function __construct(ParserCacheInterface $parser = null, array $providers = array())
+            public function __construct(ParserCacheInterface $parser = null, array $providers = [])
             {
                 // prepends the default provider to let users override it easily
                 array_unshift($providers, new StringExpressionLanguageProvider());
diff --git a/components/expression_language/syntax.rst b/components/expression_language/syntax.rst
index dae2c8c517a..4ba134fbf38 100644
--- a/components/expression_language/syntax.rst
+++ b/components/expression_language/syntax.rst
@@ -56,9 +56,9 @@ to JavaScript::
 
     var_dump($expressionLanguage->evaluate(
         'fruit.variety',
-        array(
+        [
             'fruit' => $apple,
-        )
+        ]
     ));
 
 This will print out ``Honeycrisp``.
@@ -73,7 +73,7 @@ JavaScript::
     {
         public function sayHi($times)
         {
-            $greetings = array();
+            $greetings = [];
             for ($i = 0; $i < $times; $i++) {
                 $greetings[] = 'Hi';
             }
@@ -86,9 +86,9 @@ JavaScript::
 
     var_dump($expressionLanguage->evaluate(
         'robot.sayHi(3)',
-        array(
+        [
             'robot' => $robot,
-        )
+        ]
     ));
 
 This will print out ``Hi Hi Hi!``.
@@ -124,13 +124,13 @@ Working with Arrays
 If you pass an array into an expression, use the ``[]`` syntax to access
 array keys, similar to JavaScript::
 
-    $data = array('life' => 10, 'universe' => 10, 'everything' => 22);
+    $data = ['life' => 10, 'universe' => 10, 'everything' => 22];
 
     var_dump($expressionLanguage->evaluate(
         'data["life"] + data["universe"] + data["everything"]',
-        array(
+        [
             'data' => $data,
-        )
+        ]
     ));
 
 This will print out ``42``.
@@ -154,11 +154,11 @@ For example::
 
     var_dump($expressionLanguage->evaluate(
         'life + universe + everything',
-        array(
+        [
             'life' => 10,
             'universe' => 10,
             'everything' => 22,
-        )
+        ]
     ));
 
 This will print out ``42``.
@@ -197,20 +197,20 @@ Examples::
 
     $ret1 = $expressionLanguage->evaluate(
         'life == everything',
-        array(
+        [
             'life' => 10,
             'universe' => 10,
             'everything' => 22,
-        )
+        ]
     );
 
     $ret2 = $expressionLanguage->evaluate(
         'life > everything',
-        array(
+        [
             'life' => 10,
             'universe' => 10,
             'everything' => 22,
-        )
+        ]
     );
 
 Both variables would be set to ``false``.
@@ -226,11 +226,11 @@ For example::
 
     $ret = $expressionLanguage->evaluate(
         'life < universe or life < everything',
-        array(
+        [
             'life' => 10,
             'universe' => 10,
             'everything' => 22,
-        )
+        ]
     );
 
 This ``$ret`` variable will be set to ``true``.
@@ -244,10 +244,10 @@ For example::
 
     var_dump($expressionLanguage->evaluate(
         'firstName~" "~lastName',
-        array(
+        [
             'firstName' => 'Arthur',
             'lastName' => 'Dent',
-        )
+        ]
     ));
 
 This would print out ``Arthur Dent``.
@@ -270,9 +270,9 @@ For example::
 
     $inGroup = $expressionLanguage->evaluate(
         'user.group in ["human_resources", "marketing"]',
-        array(
+        [
             'user' => $user,
-        )
+        ]
     );
 
 The ``$inGroup`` would evaluate to ``true``.
@@ -294,9 +294,9 @@ For example::
 
     $expressionLanguage->evaluate(
         'user.age in 18..45',
-        array(
+        [
             'user' => $user,
-        )
+        ]
     );
 
 This will evaluate to ``true``, because ``user.age`` is in the range from
diff --git a/components/filesystem.rst b/components/filesystem.rst
index f7eeee53a6f..7cd61bb80cd 100644
--- a/components/filesystem.rst
+++ b/components/filesystem.rst
@@ -83,7 +83,7 @@ them is missing::
 
     // if rabbit.jpg exists and bottle.png does not exist, returns false
     // non-absolute paths are relative to the directory where the running PHP script is stored
-    $fileSystem->exists(array('rabbit.jpg', 'bottle.png'));
+    $fileSystem->exists(['rabbit.jpg', 'bottle.png']);
 
 .. note::
 
@@ -178,7 +178,7 @@ remove
 :method:`Symfony\\Component\\Filesystem\\Filesystem::remove` deletes files,
 directories and symlinks::
 
-    $fileSystem->remove(array('symlink', '/path/to/directory', 'activity.log'));
+    $fileSystem->remove(['symlink', '/path/to/directory', 'activity.log']);
 
 .. note::
 
diff --git a/components/finder.rst b/components/finder.rst
index ba88ff908a6..c010915c1b5 100644
--- a/components/finder.rst
+++ b/components/finder.rst
@@ -96,7 +96,7 @@ Search in several locations by chaining calls to
 :method:`Symfony\\Component\\Finder\\Finder::in`::
 
     // search inside *both* directories
-    $finder->in(array(__DIR__, '/elsewhere'));
+    $finder->in([__DIR__, '/elsewhere']);
 
     // same as above
     $finder->in(__DIR__)->in('/elsewhere');
diff --git a/components/form.rst b/components/form.rst
index 1c9bf3f0491..348371dda94 100644
--- a/components/form.rst
+++ b/components/form.rst
@@ -201,16 +201,16 @@ to bootstrap or access Twig and add the :class:`Symfony\\Bridge\\Twig\\Extension
     // the path to your other templates
     $viewsDirectory = realpath(__DIR__.'/../views');
 
-    $twig = new Environment(new FilesystemLoader(array(
+    $twig = new Environment(new FilesystemLoader([
         $viewsDirectory,
         $vendorTwigBridgeDirectory.'/Resources/views/Form',
-    )));
-    $formEngine = new TwigRendererEngine(array($defaultFormTheme), $twig);
-    $twig->addRuntimeLoader(new FactoryRuntimeLoader(array(
+    ]));
+    $formEngine = new TwigRendererEngine([$defaultFormTheme], $twig);
+    $twig->addRuntimeLoader(new FactoryRuntimeLoader([
         FormRenderer::class => function () use ($formEngine, $csrfManager) {
             return new FormRenderer($formEngine, $csrfManager);
         },
-    )));
+    ]));
 
     // ... (see the previous CSRF Protection section for more information)
 
@@ -405,9 +405,9 @@ is created from the form factory.
             ->add('dueDate', DateType::class)
             ->getForm();
 
-        var_dump($twig->render('new.html.twig', array(
+        var_dump($twig->render('new.html.twig', [
             'form' => $form->createView(),
-        )));
+        ]));
 
     .. code-block:: php-symfony
 
@@ -431,9 +431,9 @@ is created from the form factory.
                     ->add('dueDate', DateType::class)
                     ->getForm();
 
-                return $this->render('@AcmeTask/Default/new.html.twig', array(
+                return $this->render('@AcmeTask/Default/new.html.twig', [
                     'form' => $form->createView(),
-                ));
+                ]);
             }
         }
 
@@ -462,9 +462,9 @@ builder:
 
         // ...
 
-        $defaults = array(
+        $defaults = [
             'dueDate' => new \DateTime('tomorrow'),
-        );
+        ];
 
         $form = $formFactory->createBuilder(FormType::class, $defaults)
             ->add('task', TextType::class)
@@ -484,9 +484,9 @@ builder:
         {
             public function newAction(Request $request)
             {
-                $defaults = array(
+                $defaults = [
                     'dueDate' => new \DateTime('tomorrow'),
-                );
+                ];
 
                 $form = $this->createFormBuilder($defaults)
                     ->add('task', TextType::class)
@@ -546,10 +546,10 @@ by ``handleRequest()`` to determine whether a form has been submitted):
 
         // ...
 
-        $formBuilder = $formFactory->createBuilder(FormType::class, null, array(
+        $formBuilder = $formFactory->createBuilder(FormType::class, null, [
             'action' => '/search',
             'method' => 'GET',
-        ));
+        ]);
 
         // ...
 
@@ -565,10 +565,10 @@ by ``handleRequest()`` to determine whether a form has been submitted):
         {
             public function searchAction()
             {
-                $formBuilder = $this->createFormBuilder(null, array(
+                $formBuilder = $this->createFormBuilder(null, [
                     'action' => '/search',
                     'method' => 'GET',
-                ));
+                ]);
 
                 // ...
             }
@@ -680,15 +680,15 @@ option when building each field:
         use Symfony\Component\Form\Extension\Core\Type\DateType;
 
         $form = $formFactory->createBuilder()
-            ->add('task', TextType::class, array(
+            ->add('task', TextType::class, [
                 'constraints' => new NotBlank(),
-            ))
-            ->add('dueDate', DateType::class, array(
-                'constraints' => array(
+            ])
+            ->add('dueDate', DateType::class, [
+                'constraints' => [
                     new NotBlank(),
                     new Type(\DateTime::class),
-                )
-            ))
+                ]
+            ])
             ->getForm();
 
     .. code-block:: php-symfony
@@ -707,15 +707,15 @@ option when building each field:
             public function newAction(Request $request)
             {
                 $form = $this->createFormBuilder()
-                    ->add('task', TextType::class, array(
+                    ->add('task', TextType::class, [
                         'constraints' => new NotBlank(),
-                    ))
-                    ->add('dueDate', DateType::class, array(
-                        'constraints' => array(
+                    ])
+                    ->add('dueDate', DateType::class, [
+                        'constraints' => [
                             new NotBlank(),
                             new Type(\DateTime::class),
-                        )
-                    ))
+                        ]
+                    ])
                     ->getForm();
                 // ...
             }
diff --git a/components/http_foundation.rst b/components/http_foundation.rst
index 40ae2867c62..c0a2b7eae6b 100644
--- a/components/http_foundation.rst
+++ b/components/http_foundation.rst
@@ -53,7 +53,7 @@ which is almost equivalent to the more verbose, but also more flexible,
     $request = new Request(
         $_GET,
         $_POST,
-        array(),
+        [],
         $_COOKIE,
         $_FILES,
         $_SERVER
@@ -167,7 +167,7 @@ When PHP imports the request query, it handles request parameters like
     // the query string is '?foo[bar]=baz'
 
     $request->query->get('foo');
-    // returns array('bar' => 'baz')
+    // returns ['bar' => 'baz']
 
     $request->query->get('foo[bar]');
     // returns null
@@ -211,7 +211,7 @@ a request::
     $request = Request::create(
         '/hello-world',
         'GET',
-        array('name' => 'Fabien')
+        ['name' => 'Fabien']
     );
 
 The :method:`Symfony\\Component\\HttpFoundation\\Request::create` method
@@ -297,12 +297,12 @@ PHP callable that is able to create an instance of your ``Request`` class::
     use Symfony\Component\HttpFoundation\Request;
 
     Request::setFactory(function (
-        array $query = array(),
-        array $request = array(),
-        array $attributes = array(),
-        array $cookies = array(),
-        array $files = array(),
-        array $server = array(),
+        array $query = [],
+        array $request = [],
+        array $attributes = [],
+        array $cookies = [],
+        array $files = [],
+        array $server = [],
         $content = null
     ) {
         return new SpecialRequest(
@@ -333,7 +333,7 @@ code, and an array of HTTP headers::
     $response = new Response(
         'Content',
         Response::HTTP_OK,
-        array('content-type' => 'text/html')
+        ['content-type' => 'text/html']
     );
 
 This information can also be manipulated after the Response object creation::
@@ -416,14 +416,14 @@ The :method:`Symfony\\Component\\HttpFoundation\\Response::setCache` method
 can be used to set the most commonly used cache information in one method
 call::
 
-    $response->setCache(array(
+    $response->setCache([
         'etag'          => 'abcdef',
         'last_modified' => new \DateTime(),
         'max_age'       => 600,
         's_maxage'      => 600,
         'private'       => false,
         'public'        => true,
-    ));
+    ]);
 
 To check if the Response validators (``ETag``, ``Last-Modified``) match a
 conditional value specified in the client Request, use the
@@ -573,9 +573,9 @@ right content and headers. A JSON response might look like this::
     use Symfony\Component\HttpFoundation\Response;
 
     $response = new Response();
-    $response->setContent(json_encode(array(
+    $response->setContent(json_encode([
         'data' => 123,
-    )));
+    ]));
     $response->headers->set('Content-Type', 'application/json');
 
 There is also a helpful :class:`Symfony\\Component\\HttpFoundation\\JsonResponse`
@@ -584,12 +584,12 @@ class, which can make this even easier::
     use Symfony\Component\HttpFoundation\JsonResponse;
 
     // if you know the data to send when creating the response
-    $response = new JsonResponse(array('data' => 123));
+    $response = new JsonResponse(['data' => 123]);
 
     // if you don't know the data to send when creating the response
     $response = new JsonResponse();
     // ...
-    $response->setData(array('data' => 123));
+    $response->setData(['data' => 123]);
 
     // if the data to send is already encoded in JSON
     $response = JsonResponse::fromJsonString('{ "data": 123 }');
diff --git a/components/http_foundation/session_configuration.rst b/components/http_foundation/session_configuration.rst
index 5ad54f7f132..f78afca76ee 100644
--- a/components/http_foundation/session_configuration.rst
+++ b/components/http_foundation/session_configuration.rst
@@ -45,7 +45,7 @@ Example usage::
     use Symfony\Component\HttpFoundation\Session\Storage\NativeSessionStorage;
     use Symfony\Component\HttpFoundation\Session\Storage\Handler\NativeFileSessionHandler;
 
-    $sessionStorage = new NativeSessionStorage(array(), new NativeFileSessionHandler());
+    $sessionStorage = new NativeSessionStorage([], new NativeFileSessionHandler());
     $session = new Session($sessionStorage);
 
 .. note::
@@ -84,7 +84,7 @@ Example usage::
     use Symfony\Component\HttpFoundation\Session\Storage\Handler\PdoSessionHandler;
 
     $pdo = new \PDO(...);
-    $sessionStorage = new NativeSessionStorage(array(), new PdoSessionHandler($pdo));
+    $sessionStorage = new NativeSessionStorage([], new PdoSessionHandler($pdo));
     $session = new Session($sessionStorage);
 
 Configuring PHP Sessions
@@ -175,7 +175,7 @@ calculated by adding the PHP runtime configuration value in
     using the ``migrate()`` or ``invalidate()`` methods of the ``Session`` class.
 
     The initial cookie lifetime can be set by configuring ``NativeSessionStorage``
-    using the ``setOptions(array('cookie_lifetime' => 1234))`` method.
+    using the ``setOptions(['cookie_lifetime' => 1234])`` method.
 
 .. note::
 
diff --git a/components/http_foundation/sessions.rst b/components/http_foundation/sessions.rst
index 609bee58191..32f85109826 100644
--- a/components/http_foundation/sessions.rst
+++ b/components/http_foundation/sessions.rst
@@ -33,7 +33,7 @@ Quick example::
     $session->getFlashBag()->add('notice', 'Profile updated');
 
     // retrieve messages
-    foreach ($session->getFlashBag()->get('notice', array()) as $message) {
+    foreach ($session->getFlashBag()->get('notice', []) as $message) {
         echo '<div class="flash-notice">'.$message.'</div>';
     }
 
@@ -219,12 +219,12 @@ data is an array, for example a set of tokens. In this case, managing the array
 becomes a burden because you have to retrieve the array then process it and
 store it again::
 
-    $tokens = array(
-        'tokens' => array(
+    $tokens = [
+        'tokens' => [
             'a' => 'a6c1e0b6',
             'b' => 'f4a7b1f3',
-        ),
-    );
+        ],
+    ];
 
 So any processing of this might quickly get ugly, even simply adding a token to
 the array::
@@ -278,7 +278,7 @@ has a simple API
     Gets flashes by type and clears those flashes from the bag.
 
 :method:`Symfony\\Component\\HttpFoundation\\Session\\Flash\\FlashBagInterface::setAll`
-    Sets all flashes, accepts a keyed array of arrays ``type => array(messages)``.
+    Sets all flashes, accepts a keyed array of arrays ``type => [messages]``.
 
 :method:`Symfony\\Component\\HttpFoundation\\Session\\Flash\\FlashBagInterface::all`
     Gets all flashes (as a keyed array of arrays) and clears the flashes from the bag.
@@ -324,12 +324,12 @@ Displaying the flash messages might look as follows.
 Simple, display one type of message::
 
     // display warnings
-    foreach ($session->getFlashBag()->get('warning', array()) as $message) {
+    foreach ($session->getFlashBag()->get('warning', []) as $message) {
         echo '<div class="flash-warning">'.$message.'</div>';
     }
 
     // display errors
-    foreach ($session->getFlashBag()->get('error', array()) as $message) {
+    foreach ($session->getFlashBag()->get('error', []) as $message) {
         echo '<div class="flash-error">'.$message.'</div>';
     }
 
diff --git a/components/http_kernel.rst b/components/http_kernel.rst
index df027ffb5d9..6e001d12f81 100644
--- a/components/http_kernel.rst
+++ b/components/http_kernel.rst
@@ -661,12 +661,12 @@ else that can be used to create a working example::
     use Symfony\Component\Routing\RouteCollection;
 
     $routes = new RouteCollection();
-    $routes->add('hello', new Route('/hello/{name}', array(
+    $routes->add('hello', new Route('/hello/{name}', [
         '_controller' => function (Request $request) {
             return new Response(
                 sprintf("Hello %s", $request->get('name'))
             );
-        })
+        }]
     ));
 
     $request = Request::createFromGlobals();
diff --git a/components/intl.rst b/components/intl.rst
index 72af4cc99ec..05055221692 100644
--- a/components/intl.rst
+++ b/components/intl.rst
@@ -96,13 +96,13 @@ class::
     use Symfony\Component\Intl\ResourceBundle\Compiler\BundleCompiler;
 
     $writer = new TextBundleWriter();
-    $writer->write('/path/to/bundle', 'en', array(
-        'Data' => array(
+    $writer->write('/path/to/bundle', 'en', [
+        'Data' => [
             'entry1',
             'entry2',
             // ...
-        ),
-    ));
+        ],
+    ]);
 
     $compiler = new BundleCompiler();
     $compiler->compile('/path/to/bundle', '/path/to/binary/bundle');
@@ -123,13 +123,13 @@ writes an array or an array-like object to a .php resource bundle::
     use Symfony\Component\Intl\ResourceBundle\Writer\PhpBundleWriter;
 
     $writer = new PhpBundleWriter();
-    $writer->write('/path/to/bundle', 'en', array(
-        'Data' => array(
+    $writer->write('/path/to/bundle', 'en', [
+        'Data' => [
             'entry1',
             'entry2',
             // ...
-        ),
-    ));
+        ],
+    ]);
 
 BinaryBundleReader
 ~~~~~~~~~~~~~~~~~~
@@ -201,7 +201,7 @@ returned::
     var_dump($data['Data']['entry1']);
 
     // returns null if the key "Data" does not exist
-    var_dump($reader->readEntry('/path/to/bundle', 'en', array('Data', 'entry1')));
+    var_dump($reader->readEntry('/path/to/bundle', 'en', ['Data', 'entry1']));
 
 Additionally, the
 :method:`Symfony\\Component\\Intl\\ResourceBundle\\Reader\\StructuredBundleReaderInterface::readEntry`
@@ -215,7 +215,7 @@ locale will be merged. In order to suppress this behavior, the last parameter
     var_dump($reader->readEntry(
         '/path/to/bundle',
         'en',
-        array('Data', 'entry1'),
+        ['Data', 'entry1'],
         false
     ));
 
@@ -243,7 +243,7 @@ bundle::
     \Locale::setDefault('en');
 
     $languages = Intl::getLanguageBundle()->getLanguageNames();
-    // => array('ab' => 'Abkhazian', ...)
+    // => ['ab' => 'Abkhazian', ...]
 
     $language = Intl::getLanguageBundle()->getLanguageName('de');
     // => 'German'
@@ -252,7 +252,7 @@ bundle::
     // => 'Austrian German'
 
     $scripts = Intl::getLanguageBundle()->getScriptNames();
-    // => array('Arab' => 'Arabic', ...)
+    // => ['Arab' => 'Arabic', ...]
 
     $script = Intl::getLanguageBundle()->getScriptName('Hans');
     // => 'Simplified'
@@ -261,7 +261,7 @@ All methods accept the translation locale as the last, optional parameter,
 which defaults to the current default locale::
 
     $languages = Intl::getLanguageBundle()->getLanguageNames('de');
-    // => array('ab' => 'Abchasisch', ...)
+    // => ['ab' => 'Abchasisch', ...]
 
 Country Names
 ~~~~~~~~~~~~~
@@ -273,7 +273,7 @@ The translations of country names can be found in the region bundle::
     \Locale::setDefault('en');
 
     $countries = Intl::getRegionBundle()->getCountryNames();
-    // => array('AF' => 'Afghanistan', ...)
+    // => ['AF' => 'Afghanistan', ...]
 
     $country = Intl::getRegionBundle()->getCountryName('GB');
     // => 'United Kingdom'
@@ -282,7 +282,7 @@ All methods accept the translation locale as the last, optional parameter,
 which defaults to the current default locale::
 
     $countries = Intl::getRegionBundle()->getCountryNames('de');
-    // => array('AF' => 'Afghanistan', ...)
+    // => ['AF' => 'Afghanistan', ...]
 
 Locales
 ~~~~~~~
@@ -294,7 +294,7 @@ The translations of locale names can be found in the locale bundle::
     \Locale::setDefault('en');
 
     $locales = Intl::getLocaleBundle()->getLocaleNames();
-    // => array('af' => 'Afrikaans', ...)
+    // => ['af' => 'Afrikaans', ...]
 
     $locale = Intl::getLocaleBundle()->getLocaleName('zh_Hans_MO');
     // => 'Chinese (Simplified, Macau SAR China)'
@@ -303,7 +303,7 @@ All methods accept the translation locale as the last, optional parameter,
 which defaults to the current default locale::
 
     $locales = Intl::getLocaleBundle()->getLocaleNames('de');
-    // => array('af' => 'Afrikaans', ...)
+    // => ['af' => 'Afrikaans', ...]
 
 Currencies
 ~~~~~~~~~~
@@ -316,7 +316,7 @@ be found in the currency bundle::
     \Locale::setDefault('en');
 
     $currencies = Intl::getCurrencyBundle()->getCurrencyNames();
-    // => array('AFN' => 'Afghan Afghani', ...)
+    // => ['AFN' => 'Afghan Afghani', ...]
 
     $currency = Intl::getCurrencyBundle()->getCurrencyName('INR');
     // => 'Indian Rupee'
@@ -338,7 +338,7 @@ accept the translation locale as the last, optional parameter, which defaults
 to the current default locale::
 
     $currencies = Intl::getCurrencyBundle()->getCurrencyNames('de');
-    // => array('AFN' => 'Afghanische Afghani', ...)
+    // => ['AFN' => 'Afghanische Afghani', ...]
 
 That's all you need to know for now. Have fun coding!
 
diff --git a/components/ldap.rst b/components/ldap.rst
index c3af9ed322a..c764438671e 100644
--- a/components/ldap.rst
+++ b/components/ldap.rst
@@ -56,16 +56,16 @@ For example, to connect to a start-TLS secured LDAP server::
 
     use Symfony\Component\Ldap\Ldap;
 
-    $ldap = Ldap::create('ext_ldap', array(
+    $ldap = Ldap::create('ext_ldap', [
         'host' => 'my-server',
         'encryption' => 'ssl',
-    ));
+    ]);
 
 Or you could directly specify a connection string::
 
     use Symfony\Component\Ldap\Ldap;
 
-    $ldap = Ldap::create('ext_ldap', array('connection_string' => 'ldaps://my-server:636'));
+    $ldap = Ldap::create('ext_ldap', ['connection_string' => 'ldaps://my-server:636']);
 
 The :method:`Symfony\\Component\\Ldap\\Ldap::bind` method
 authenticates a previously configured connection using both the
@@ -113,10 +113,10 @@ delete existing ones::
     use Symfony\Component\Ldap\Entry;
     // ...
 
-    $entry = new Entry('cn=Fabien Potencier,dc=symfony,dc=com', array(
-        'sn' => array('fabpot'),
-        'objectClass' => array('inetOrgPerson'),
-    ));
+    $entry = new Entry('cn=Fabien Potencier,dc=symfony,dc=com', [
+        'sn' => ['fabpot'],
+        'objectClass' => ['inetOrgPerson'],
+    ]);
 
     $entryManager = $ldap->getEntryManager();
 
@@ -127,7 +127,7 @@ delete existing ones::
     $query = $ldap->query('dc=symfony,dc=com', '(&(objectclass=person)(ou=Maintainers))');
     $result = $query->execute();
     $entry = $result[0];
-    $entry->setAttribute('email', array('fabpot@symfony.com'));
+    $entry->setAttribute('email', ['fabpot@symfony.com']);
     $entryManager->update($entry);
 
     // Removing an existing entry
diff --git a/components/lock.rst b/components/lock.rst
index 6fc9fac2a0b..72e3d5a721f 100644
--- a/components/lock.rst
+++ b/components/lock.rst
@@ -248,7 +248,7 @@ then the lock is considered as acquired; otherwise as not acquired::
     use Symfony\Component\Lock\Store\RedisStore;
 
     $stores = [];
-    foreach (array('server1', 'server2', 'server3') as $server) {
+    foreach (['server1', 'server2', 'server3'] as $server) {
         $redis = new \Redis();
         $redis->connect($server);
 
diff --git a/components/options_resolver.rst b/components/options_resolver.rst
index 01bee94a151..5f302cec4d2 100644
--- a/components/options_resolver.rst
+++ b/components/options_resolver.rst
@@ -30,7 +30,7 @@ Imagine you have a ``Mailer`` class which has four options: ``host``,
     {
         protected $options;
 
-        public function __construct(array $options = array())
+        public function __construct(array $options = [])
         {
             $this->options = $options;
         }
@@ -74,14 +74,14 @@ options are buried in the business logic of your code. Use the
     {
         // ...
 
-        public function __construct(array $options = array())
+        public function __construct(array $options = [])
         {
-            $this->options = array_replace(array(
+            $this->options = array_replace([
                 'host'     => 'smtp.example.org',
                 'username' => 'user',
                 'password' => 'pa$$word',
                 'port'     => 25,
-            ), $options);
+            ], $options);
         }
     }
 
@@ -90,9 +90,9 @@ the ``Mailer`` class makes a mistake?
 
 .. code-block:: php
 
-    $mailer = new Mailer(array(
+    $mailer = new Mailer([
         'usernme' => 'johndoe',  // usernme misspelled (instead of username)
-    ));
+    ]);
 
 No error will be shown. In the best case, the bug will appear during testing,
 but the developer will spend time looking for the problem. In the worst case,
@@ -107,15 +107,15 @@ class helps you to fix this problem::
     {
         // ...
 
-        public function __construct(array $options = array())
+        public function __construct(array $options = [])
         {
             $resolver = new OptionsResolver();
-            $resolver->setDefaults(array(
+            $resolver->setDefaults([
                 'host'     => 'smtp.example.org',
                 'username' => 'user',
                 'password' => 'pa$$word',
                 'port'     => 25,
-            ));
+            ]);
 
             $this->options = $resolver->resolve($options);
         }
@@ -125,9 +125,9 @@ Like before, all options will be guaranteed to be set. Additionally, an
 :class:`Symfony\\Component\\OptionsResolver\\Exception\\UndefinedOptionsException`
 is thrown if an unknown option is passed::
 
-    $mailer = new Mailer(array(
+    $mailer = new Mailer([
         'usernme' => 'johndoe',
-    ));
+    ]);
 
     // UndefinedOptionsException: The option "usernme" does not exist.
     // Known options are: "host", "password", "port", "username"
@@ -158,7 +158,7 @@ It's a good practice to split the option configuration into a separate method::
     {
         // ...
 
-        public function __construct(array $options = array())
+        public function __construct(array $options = [])
         {
             $resolver = new OptionsResolver();
             $this->configureOptions($resolver);
@@ -168,13 +168,13 @@ It's a good practice to split the option configuration into a separate method::
 
         public function configureOptions(OptionsResolver $resolver)
         {
-            $resolver->setDefaults(array(
+            $resolver->setDefaults([
                 'host'       => 'smtp.example.org',
                 'username'   => 'user',
                 'password'   => 'pa$$word',
                 'port'       => 25,
                 'encryption' => null,
-            ));
+            ]);
         }
     }
 
@@ -189,10 +189,10 @@ than processing options. Second, sub-classes may now override the
         {
             parent::configureOptions($resolver);
 
-            $resolver->setDefaults(array(
+            $resolver->setDefaults([
                 'host' => 'smtp.google.com',
                 'encryption' => 'ssl',
-            ));
+            ]);
         }
     }
 
@@ -235,7 +235,7 @@ one required option::
         public function configureOptions(OptionsResolver $resolver)
         {
             // ...
-            $resolver->setRequired(array('host', 'username', 'password'));
+            $resolver->setRequired(['host', 'username', 'password']);
         }
     }
 
@@ -323,7 +323,7 @@ correctly. To validate the types of the options, call
             $resolver->setAllowedTypes('host', 'string');
 
             // specify multiple allowed types
-            $resolver->setAllowedTypes('port', array('null', 'int'));
+            $resolver->setAllowedTypes('port', ['null', 'int']);
 
             // check all items in an array recursively for a type
             $resolver->setAllowedTypes('dates', 'DateTime[]');
@@ -345,9 +345,9 @@ If you pass an invalid option now, an
 :class:`Symfony\\Component\\OptionsResolver\\Exception\\InvalidOptionsException`
 is thrown::
 
-    $mailer = new Mailer(array(
+    $mailer = new Mailer([
         'host' => 25,
-    ));
+    ]);
 
     // InvalidOptionsException: The option "host" with value "25" is
     // expected to be of type "string"
@@ -373,7 +373,7 @@ to verify that the passed option contains one of these values::
         {
             // ...
             $resolver->setDefault('transport', 'sendmail');
-            $resolver->setAllowedValues('transport', array('sendmail', 'mail', 'smtp'));
+            $resolver->setAllowedValues('transport', ['sendmail', 'mail', 'smtp']);
         }
     }
 
@@ -381,9 +381,9 @@ If you pass an invalid transport, an
 :class:`Symfony\\Component\\OptionsResolver\\Exception\\InvalidOptionsException`
 is thrown::
 
-    $mailer = new Mailer(array(
+    $mailer = new Mailer([
         'transport' => 'send-mail',
-    ));
+    ]);
 
     // InvalidOptionsException: The option "transport" has the value
     // "send-mail", but is expected to be one of "sendmail", "mail", "smtp"
@@ -506,10 +506,10 @@ the closure::
         public function configureOptions(OptionsResolver $resolver)
         {
             // ...
-            $resolver->setDefaults(array(
+            $resolver->setDefaults([
                 'encryption' => null,
                 'host' => 'example.org',
-            ));
+            ]);
         }
     }
 
@@ -594,9 +594,9 @@ be included in the resolved options if it was actually passed to
     $mailer->sendMail($from, $to);
     // => Not Set!
 
-    $mailer = new Mailer(array(
+    $mailer = new Mailer([
         'port' => 25,
-    ));
+    ]);
     $mailer->sendMail($from, $to);
     // => Set!
 
@@ -610,7 +610,7 @@ options in one go::
         public function configureOptions(OptionsResolver $resolver)
         {
             // ...
-            $resolver->setDefined(array('port', 'encryption'));
+            $resolver->setDefined(['port', 'encryption']);
         }
     }
 
@@ -651,11 +651,11 @@ can change your code to do the configuration only once per class::
     // ...
     class Mailer
     {
-        private static $resolversByClass = array();
+        private static $resolversByClass = [];
 
         protected $options;
 
-        public function __construct(array $options = array())
+        public function __construct(array $options = [])
         {
             // What type of Mailer is this, a Mailer, a GoogleMailer, ... ?
             $class = get_class($this);
@@ -684,11 +684,11 @@ method ``clearOptionsConfig()`` and call it periodically::
     // ...
     class Mailer
     {
-        private static $resolversByClass = array();
+        private static $resolversByClass = [];
 
         public static function clearOptionsConfig()
         {
-            self::$resolversByClass = array();
+            self::$resolversByClass = [];
         }
 
         // ...
diff --git a/components/phpunit_bridge.rst b/components/phpunit_bridge.rst
index 1b15d6da181..710679e2253 100644
--- a/components/phpunit_bridge.rst
+++ b/components/phpunit_bridge.rst
@@ -433,7 +433,7 @@ constraint to test the validity of the email domain::
         public function testEmail()
         {
             $validator = ...
-            $constraint = new Email(array('checkMX' => true));
+            $constraint = new Email(['checkMX' => true]);
 
             $result = $validator->validate('foo@example.com', $constraint);
 
@@ -454,10 +454,10 @@ the data you expect to get for the given hosts::
     {
         public function testEmails()
         {
-            DnsMock::withMockedHosts(array('example.com' => array(array('type' => 'MX'))));
+            DnsMock::withMockedHosts(['example.com' => [['type' => 'MX']]]);
 
             $validator = ...
-            $constraint = new Email(array('checkMX' => true));
+            $constraint = new Email(['checkMX' => true]);
 
             $result = $validator->validate('foo@example.com', $constraint);
 
@@ -469,18 +469,18 @@ are the mocked hosts and the values are arrays of DNS records in the same format
 returned by :phpfunction:`dns_get_record`, so you can simulate diverse network
 conditions::
 
-    DnsMock::withMockedHosts(array(
-        'example.com' => array(
-            array(
+    DnsMock::withMockedHosts([
+        'example.com' => [
+            [
                 'type' => 'A',
                 'ip' => '1.2.3.4',
-            ),
-            array(
+            ],
+            [
                 'type' => 'AAAA',
                 'ipv6' => '::12',
-            ),
-        ),
-    ));
+            ],
+        ],
+    ]);
 
 Troubleshooting
 ---------------
diff --git a/components/process.rst b/components/process.rst
index dbc1e472354..679fe67cc31 100644
--- a/components/process.rst
+++ b/components/process.rst
@@ -27,7 +27,7 @@ a command in a sub-process::
     use Symfony\Component\Process\Process;
     use Symfony\Component\Process\Exception\ProcessFailedException;
 
-    $process = new Process(array('ls', '-lsa'));
+    $process = new Process(['ls', '-lsa']);
     $process->run();
 
     // executes after the command finishes
@@ -55,7 +55,7 @@ You can also use the :class:`Symfony\\Component\\Process\\Process` class with th
 foreach construct to get the output while it is generated. By default, the loop waits
 for new output before going to the next iteration::
 
-    $process = new Process(array('ls', '-lsa'));
+    $process = new Process(['ls', '-lsa']);
     $process->start();
 
     foreach ($process as $type => $data) {
@@ -72,7 +72,7 @@ for new output before going to the next iteration::
     it is generated. That iterator is exposed via the ``getIterator()`` method
     to allow customizing its behavior::
 
-        $process = new Process(array('ls', '-lsa'));
+        $process = new Process(['ls', '-lsa']);
         $process->start();
         $iterator = $process->getIterator($process::ITER_SKIP_ERR | $process::ITER_KEEP_OUTPUT);
         foreach ($iterator as $data) {
@@ -91,7 +91,7 @@ with a non-zero code)::
     use Symfony\Component\Process\Exception\ProcessFailedException;
     use Symfony\Component\Process\Process;
 
-    $process = new Process(array('ls', '-lsa'));
+    $process = new Process(['ls', '-lsa']);
 
     try {
         $process->mustRun();
@@ -112,7 +112,7 @@ with a non-zero code)::
     saves you from any escaping and allows sending signals seamlessly
     (e.g. to stop processes before completion.)::
 
-        $process = new Process(array('/path/command', '--flag', 'arg 1', 'etc.'));
+        $process = new Process(['/path/command', '--flag', 'arg 1', 'etc.']);
 
     If you need to use stream redirections, conditional execution, or any other
     feature provided by the shell of your operating system, you can also define
@@ -132,7 +132,7 @@ with a non-zero code)::
         $process = new Process('echo "!MESSAGE!"');
 
         // On both Unix-like and Windows
-        $process->run(null, array('MESSAGE' => 'Something to output'));
+        $process->run(null, ['MESSAGE' => 'Something to output']);
 
 Getting real-time Process Output
 --------------------------------
@@ -144,7 +144,7 @@ anonymous function to the
 
     use Symfony\Component\Process\Process;
 
-    $process = new Process(array('ls', '-lsa'));
+    $process = new Process(['ls', '-lsa']);
     $process->run(function ($type, $buffer) {
         if (Process::ERR === $type) {
             echo 'ERR > '.$buffer;
@@ -163,7 +163,7 @@ process, the :method:`Symfony\\Component\\Process\\Process::isRunning` method
 to check if the process is done and the
 :method:`Symfony\\Component\\Process\\Process::getOutput` method to get the output::
 
-    $process = new Process(array('ls', '-lsa'));
+    $process = new Process(['ls', '-lsa']);
     $process->start();
 
     while ($process->isRunning()) {
@@ -175,7 +175,7 @@ to check if the process is done and the
 You can also wait for a process to end if you started it asynchronously and
 are done doing other stuff::
 
-    $process = new Process(array('ls', '-lsa'));
+    $process = new Process(['ls', '-lsa']);
     $process->start();
 
     // ... do other things
@@ -214,7 +214,7 @@ are done doing other stuff::
 a callback that is called repeatedly whilst the process is still running, passing
 in the output and its type::
 
-    $process = new Process(array('ls', '-lsa'));
+    $process = new Process(['ls', '-lsa']);
     $process->start();
 
     $process->wait(function ($type, $buffer) {
@@ -246,7 +246,7 @@ provides the :class:`Symfony\\Component\\Process\\InputStream` class::
     $input = new InputStream();
     $input->write('foo');
 
-    $process = new Process(array('cat'));
+    $process = new Process(['cat']);
     $process->setInput($input);
     $process->start();
 
@@ -272,7 +272,7 @@ The input of a process can also be defined using `PHP streams`_::
 
     $stream = fopen('php://temporary', 'w+');
 
-    $process = new Process(array('cat'));
+    $process = new Process(['cat']);
     $process->setInput($stream);
     $process->start();
 
@@ -298,7 +298,7 @@ is sent to the running process. The default signal sent to a process is ``SIGKIL
 Please read the :ref:`signal documentation below<reference-process-signal>`
 to find out more about signal handling in the Process component::
 
-    $process = new Process(array('ls', '-lsa'));
+    $process = new Process(['ls', '-lsa']);
     $process->start();
 
     // ... do other things
@@ -327,7 +327,7 @@ a different timeout (in seconds) to the ``setTimeout()`` method::
 
     use Symfony\Component\Process\Process;
 
-    $process = new Process(array('ls', '-lsa'));
+    $process = new Process(['ls', '-lsa']);
     $process->setTimeout(3600);
     $process->run();
 
@@ -359,7 +359,7 @@ considers the time since the last output was produced by the process::
 
     use Symfony\Component\Process\Process;
 
-    $process = new Process(array('something-with-variable-runtime'));
+    $process = new Process(['something-with-variable-runtime']);
     $process->setTimeout(3600);
     $process->setIdleTimeout(60);
     $process->run();
@@ -375,7 +375,7 @@ When running a program asynchronously, you can send it POSIX signals with the
 
     use Symfony\Component\Process\Process;
 
-    $process = new Process(array('find', '/', '-name', 'rabbit'));
+    $process = new Process(['find', '/', '-name', 'rabbit']);
     $process->start();
 
     // will send a SIGKILL to the process
@@ -389,7 +389,7 @@ You can access the `pid`_ of a running process with the
 
     use Symfony\Component\Process\Process;
 
-    $process = new Process(array('/usr/bin/php', 'worker.php'));
+    $process = new Process(['/usr/bin/php', 'worker.php']);
     $process->start();
 
     $pid = $process->getPid();
@@ -404,7 +404,7 @@ Use :method:`Symfony\\Component\\Process\\Process::disableOutput` and
 
     use Symfony\Component\Process\Process;
 
-    $process = new Process(array('/usr/bin/php', 'worker.php'));
+    $process = new Process(['/usr/bin/php', 'worker.php']);
     $process->disableOutput();
     $process->run();
 
diff --git a/components/property_access.rst b/components/property_access.rst
index 8bf14e346e0..1181f8ff3a7 100644
--- a/components/property_access.rst
+++ b/components/property_access.rst
@@ -40,9 +40,9 @@ You can read an array with the
 method. This is done using the index notation that is used in PHP::
 
     // ...
-    $person = array(
+    $person = [
         'first_name' => 'Wouter',
-    );
+    ];
 
     var_dump($propertyAccessor->getValue($person, '[first_name]')); // 'Wouter'
     var_dump($propertyAccessor->getValue($person, '[age]')); // null
@@ -57,9 +57,9 @@ method::
         ->enableExceptionOnInvalidIndex()
         ->getPropertyAccessor();
 
-    $person = array(
+    $person = [
         'first_name' => 'Wouter',
-    );
+    ];
 
     // instead of returning null, the code now throws an exception of type
     // Symfony\Component\PropertyAccess\Exception\NoSuchIndexException
@@ -68,14 +68,14 @@ method::
 You can also use multi dimensional arrays::
 
     // ...
-    $persons = array(
-        array(
+    $persons = [
+        [
             'first_name' => 'Wouter',
-        ),
-        array(
+        ],
+        [
             'first_name' => 'Ryan',
-        )
-    );
+        ]
+    ];
 
     var_dump($propertyAccessor->getValue($persons, '[0][first_name]')); // 'Wouter'
     var_dump($propertyAccessor->getValue($persons, '[1][first_name]')); // 'Ryan'
@@ -99,7 +99,7 @@ To read from properties, use the "dot" notation::
 
     $child = new Person();
     $child->firstName = 'Bar';
-    $person->children = array($child);
+    $person->children = [$child];
 
     var_dump($propertyAccessor->getValue($person, 'children[0].firstName')); // 'Bar'
 
@@ -144,7 +144,7 @@ getters, this means that you can do something like this::
     class Person
     {
         private $author = true;
-        private $children = array();
+        private $children = [];
 
         public function isAuthor()
         {
@@ -176,9 +176,9 @@ The ``getValue()`` method can also use the magic ``__get()`` method::
     // ...
     class Person
     {
-        private $children = array(
-            'Wouter' => array(...),
-        );
+        private $children = [
+            'Wouter' => [...],
+        ];
 
         public function __get($id)
         {
@@ -188,7 +188,7 @@ The ``getValue()`` method can also use the magic ``__get()`` method::
 
     $person = new Person();
 
-    var_dump($propertyAccessor->getValue($person, 'Wouter')); // array(...)
+    var_dump($propertyAccessor->getValue($person, 'Wouter')); // [...]
 
 .. _components-property-access-magic-call:
 
@@ -201,9 +201,9 @@ enable this feature by using :class:`Symfony\\Component\\PropertyAccess\\Propert
     // ...
     class Person
     {
-        private $children = array(
-            'wouter' => array(...),
-        );
+        private $children = [
+            'wouter' => [...],
+        ];
 
         public function __call($name, $args)
         {
@@ -226,7 +226,7 @@ enable this feature by using :class:`Symfony\\Component\\PropertyAccess\\Propert
         ->enableMagicCall()
         ->getPropertyAccessor();
 
-    var_dump($propertyAccessor->getValue($person, 'wouter')); // array(...)
+    var_dump($propertyAccessor->getValue($person, 'wouter')); // [...]
 
 .. caution::
 
@@ -243,7 +243,7 @@ also write to an array. This can be achieved using the
 method::
 
     // ...
-    $person = array();
+    $person = [];
 
     $propertyAccessor->setValue($person, '[first_name]', 'Wouter');
 
@@ -262,7 +262,7 @@ can use setters, the magic ``__set()`` method or properties to set values::
     {
         public $firstName;
         private $lastName;
-        private $children = array();
+        private $children = [];
 
         public function setLastName($name)
         {
@@ -289,11 +289,11 @@ can use setters, the magic ``__set()`` method or properties to set values::
 
     $propertyAccessor->setValue($person, 'firstName', 'Wouter');
     $propertyAccessor->setValue($person, 'lastName', 'de Jong'); // setLastName is called
-    $propertyAccessor->setValue($person, 'children', array(new Person())); // __set is called
+    $propertyAccessor->setValue($person, 'children', [new Person()]); // __set is called
 
     var_dump($person->firstName); // 'Wouter'
     var_dump($person->getLastName()); // 'de Jong'
-    var_dump($person->getChildren()); // array(Person());
+    var_dump($person->getChildren()); // [Person()];
 
 You can also use ``__call()`` to set values but you need to enable the feature,
 see `Enable other Features`_.
@@ -303,7 +303,7 @@ see `Enable other Features`_.
     // ...
     class Person
     {
-        private $children = array();
+        private $children = [];
 
         public function __call($name, $args)
         {
@@ -327,9 +327,9 @@ see `Enable other Features`_.
         ->enableMagicCall()
         ->getPropertyAccessor();
 
-    $propertyAccessor->setValue($person, 'wouter', array(...));
+    $propertyAccessor->setValue($person, 'wouter', [...]);
 
-    var_dump($person->getWouter()); // array(...)
+    var_dump($person->getWouter()); // [...]
 
 Writing to Array Properties
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~
@@ -345,7 +345,7 @@ properties through *adder* and *remover* methods.
         /**
          * @var string[]
          */
-        private $children = array();
+        private $children = [];
 
         public function getChildren(): array
         {
@@ -364,9 +364,9 @@ properties through *adder* and *remover* methods.
     }
 
     $person = new Person();
-    $propertyAccessor->setValue($person, 'children', array('kevin', 'wouter'));
+    $propertyAccessor->setValue($person, 'children', ['kevin', 'wouter']);
 
-    var_dump($person->getChildren()); // array('kevin', 'wouter')
+    var_dump($person->getChildren()); // ['kevin', 'wouter']
 
 The PropertyAccess component checks for methods called ``add<SingularOfThePropertyName>()``
 and ``remove<SingularOfThePropertyName>()``. Both methods must be defined.
@@ -411,7 +411,7 @@ You can also mix objects and arrays::
     class Person
     {
         public $firstName;
-        private $children = array();
+        private $children = [];
 
         public function setChildren($children)
         {
diff --git a/components/property_info.rst b/components/property_info.rst
index 1cfd4b94431..b75033d06c1 100644
--- a/components/property_info.rst
+++ b/components/property_info.rst
@@ -51,16 +51,16 @@ provide it with a set of information extractors.
     $reflectionExtractor = new ReflectionExtractor();
 
     // array of PropertyListExtractorInterface
-    $listExtractors = array($reflectionExtractor);
+    $listExtractors = [$reflectionExtractor];
 
     // array of PropertyTypeExtractorInterface
-    $typeExtractors = array($phpDocExtractor, $reflectionExtractor);
+    $typeExtractors = [$phpDocExtractor, $reflectionExtractor];
 
     // array of PropertyDescriptionExtractorInterface
-    $descriptionExtractors = array($phpDocExtractor);
+    $descriptionExtractors = [$phpDocExtractor];
 
     // array of PropertyAccessExtractorInterface
-    $accessExtractors = array($reflectionExtractor);
+    $accessExtractors = [$reflectionExtractor];
 
     $propertyInfo = new PropertyInfoExtractor(
         $listExtractors,
@@ -103,15 +103,15 @@ both provide list and type information it is probably better that:
 
     $propertyInfo = new PropertyInfoExtractor(
         // List extractors
-        array(
+        [
             $reflectionExtractor,
             $doctrineExtractor
-        ),
+        ],
         // Type extractors
-        array(
+        [
             $doctrineExtractor,
             $reflectionExtractor
-        )
+        ]
     );
 
 .. _`components-property-information-extractable-information`:
diff --git a/components/psr7.rst b/components/psr7.rst
index 26f9fd0dbbb..61b2d1b35e3 100644
--- a/components/psr7.rst
+++ b/components/psr7.rst
@@ -42,7 +42,7 @@ to a ``Zend\Diactoros\ServerRequest`` class implementing the
     use Symfony\Bridge\PsrHttpMessage\Factory\DiactorosFactory;
     use Symfony\Component\HttpFoundation\Request;
 
-    $symfonyRequest = new Request(array(), array(), array(), array(), array(), array('HTTP_HOST' => 'dunglas.fr'), 'Content');
+    $symfonyRequest = new Request([], [], [], [], [], ['HTTP_HOST' => 'dunglas.fr'], 'Content');
     // The HTTP_HOST server key must be set to avoid an unexpected error
 
     $psr7Factory = new DiactorosFactory();
diff --git a/components/routing.rst b/components/routing.rst
index 8b161e69e71..ea390022d40 100644
--- a/components/routing.rst
+++ b/components/routing.rst
@@ -42,7 +42,7 @@ your autoloader to load the Routing component::
     use Symfony\Component\Routing\RouteCollection;
     use Symfony\Component\Routing\Route;
 
-    $route = new Route('/foo', array('_controller' => 'MyController'));
+    $route = new Route('/foo', ['_controller' => 'MyController']);
     $routes = new RouteCollection();
     $routes->add('route_name', $route);
 
@@ -51,7 +51,7 @@ your autoloader to load the Routing component::
     $matcher = new UrlMatcher($routes, $context);
 
     $parameters = $matcher->match('/foo');
-    // array('_controller' => 'MyController', '_route' => 'route_name')
+    // ['_controller' => 'MyController', '_route' => 'route_name']
 
 .. note::
 
@@ -109,23 +109,23 @@ Take the following route, which combines several of these ideas::
 
     $route = new Route(
         '/archive/{month}', // path
-        array('_controller' => 'showArchive'), // default values
-        array('month' => '[0-9]{4}-[0-9]{2}', 'subdomain' => 'www|m'), // requirements
-        array(), // options
+        ['_controller' => 'showArchive'], // default values
+        ['month' => '[0-9]{4}-[0-9]{2}', 'subdomain' => 'www|m'], // requirements
+        [], // options
         '{subdomain}.example.com', // host
-        array(), // schemes
-        array() // methods
+        [], // schemes
+        [] // methods
     );
 
     // ...
 
     $parameters = $matcher->match('/archive/2012-01');
-    // array(
+    // [
     //     '_controller' => 'showArchive',
     //     'month' => '2012-01',
     //     'subdomain' => 'www',
     //     '_route' => ...
-    //  )
+    // ]
 
     $parameters = $matcher->match('/archive/foo');
     // throws ResourceNotFoundException
@@ -145,8 +145,8 @@ as value.
 
         $route = new Route(
             '/start/{suffix}',
-            array('suffix' => ''),
-            array('suffix' => '.*')
+            ['suffix' => ''],
+            ['suffix' => '.*']
         );
 
 Using Prefixes
@@ -165,12 +165,12 @@ host to all routes of a subtree using methods provided by the
     $subCollection->add(...);
     $subCollection->add(...);
     $subCollection->addPrefix('/prefix');
-    $subCollection->addDefaults(array(...));
-    $subCollection->addRequirements(array(...));
-    $subCollection->addOptions(array(...));
+    $subCollection->addDefaults([...]);
+    $subCollection->addRequirements([]);
+    $subCollection->addOptions([]);
     $subCollection->setHost('admin.example.com');
-    $subCollection->setMethods(array('POST'));
-    $subCollection->setSchemes(array('https'));
+    $subCollection->setMethods(['POST']);
+    $subCollection->setSchemes(['https']);
 
     $rootCollection->addCollection($subCollection);
 
@@ -224,9 +224,9 @@ a certain route::
 
     $generator = new UrlGenerator($routes, $context);
 
-    $url = $generator->generate('show_post', array(
+    $url = $generator->generate('show_post', [
         'slug' => 'my-blog-post',
-    ));
+    ]);
     // /show/my-blog-post
 
 .. note::
@@ -291,7 +291,7 @@ To load this file, you can use the following code. This assumes that your
     use Symfony\Component\Routing\Loader\YamlFileLoader;
 
     // looks inside *this* directory
-    $fileLocator = new FileLocator(array(__DIR__));
+    $fileLocator = new FileLocator([__DIR__]);
     $loader = new YamlFileLoader($fileLocator);
     $routes = $loader->load('routes.yml');
 
@@ -311,7 +311,7 @@ have to provide the name of a PHP file which returns a :class:`Symfony\\Componen
     $routes = new RouteCollection();
     $routes->add(
         'route_name',
-        new Route('/foo', array('_controller' => 'ExampleController'))
+        new Route('/foo', ['_controller' => 'ExampleController'])
     );
     // ...
 
@@ -353,7 +353,7 @@ a path to the main route definition and some other settings::
     public function __construct(
         LoaderInterface $loader,
         $resource,
-        array $options = array(),
+        array $options = [],
         RequestContext $context = null,
         LoggerInterface $logger = null
     );
@@ -363,13 +363,13 @@ path) or disable caching (if it's set to ``null``). The caching is done
 automatically in the background if you want to use it. A basic example of the
 :class:`Symfony\\Component\\Routing\\Router` class would look like::
 
-    $fileLocator = new FileLocator(array(__DIR__));
+    $fileLocator = new FileLocator([__DIR__]);
     $requestContext = new RequestContext('/');
 
     $router = new Router(
         new YamlFileLoader($fileLocator),
         'routes.yml',
-        array('cache_dir' => __DIR__.'/cache'),
+        ['cache_dir' => __DIR__.'/cache'],
         $requestContext
     );
     $router->match('/foo/bar');
@@ -444,13 +444,13 @@ routes with UTF-8 characters:
 
         $routes = new RouteCollection();
         $routes->add('route1', new Route('/category/{name}',
-            array(
+            [
                 '_controller' => 'AppBundle:Default:category',
-            ),
-            array(),
-            array(
+            ],
+            [],
+            [
                 'utf8' => true,
-            )
+            ]
         ));
 
         // ...
@@ -525,15 +525,15 @@ You can also include UTF-8 strings as routing requirements:
 
         $routes = new RouteCollection();
         $routes->add('route2', new Route('/default/{default}',
-            array(
+            [
                 '_controller' => 'AppBundle:Default:default',
-            ),
-            array(
+            ],
+            [
                 'default' => '한국어',
-            ),
-            array(
+            ],
+            [
                 'utf8' => true,
-            )
+            ]
         ));
 
         // ...
diff --git a/components/security/authentication.rst b/components/security/authentication.rst
index d7d291276db..9430808c825 100644
--- a/components/security/authentication.rst
+++ b/components/security/authentication.rst
@@ -74,7 +74,7 @@ The default authentication manager is an instance of
     use Symfony\Component\Security\Core\Exception\AuthenticationException;
 
     // instances of Symfony\Component\Security\Core\Authentication\Provider\AuthenticationProviderInterface
-    $providers = array(...);
+    $providers = [...];
 
     $authenticationManager = new AuthenticationProviderManager($providers);
 
@@ -132,13 +132,13 @@ password was valid::
     use Symfony\Component\Security\Core\Encoder\EncoderFactory;
 
     $userProvider = new InMemoryUserProvider(
-        array(
-            'admin' => array(
+        [
+            'admin' => [
                 // password is "foo"
                 'password' => '5FZ2Z8QIkA7UTZ4BYkoC+GsReLf569mSKDsfods6LYQ8t+a8EW9oaircfMpmaLbPBh4FOBiiFyLfuZmTSUwzZg==',
-                'roles'    => array('ROLE_ADMIN'),
-            ),
-        )
+                'roles'    => ['ROLE_ADMIN'],
+            ],
+        ]
     );
 
     // for some extra checks: is account enabled, locked, expired, etc.
@@ -181,11 +181,11 @@ receives an array of encoders::
     $defaultEncoder = new MessageDigestPasswordEncoder('sha512', true, 5000);
     $weakEncoder = new MessageDigestPasswordEncoder('md5', true, 1);
 
-    $encoders = array(
+    $encoders = [
         User::class       => $defaultEncoder,
         LegacyUser::class => $weakEncoder,
         // ...
-    );
+    ];
     $encoderFactory = new EncoderFactory($encoders);
 
 Each encoder should implement :class:`Symfony\\Component\\Security\\Core\\Encoder\\PasswordEncoderInterface`
diff --git a/components/security/authorization.rst b/components/security/authorization.rst
index 685df577126..cf88ed8642e 100644
--- a/components/security/authorization.rst
+++ b/components/security/authorization.rst
@@ -54,7 +54,7 @@ recognizes several strategies:
     use Symfony\Component\Security\Core\Authorization\AccessDecisionManager;
 
     // instances of Symfony\Component\Security\Core\Authorization\Voter\VoterInterface
-    $voters = array(...);
+    $voters = [...];
 
     // one of "affirmative", "consensus", "unanimous"
     $strategy = ...;
@@ -119,7 +119,7 @@ on a "remember-me" cookie, or even authenticated anonymously?
     // any object
     $object = ...;
 
-    $vote = $authenticatedVoter->vote($token, $object, array('IS_AUTHENTICATED_FULLY'));
+    $vote = $authenticatedVoter->vote($token, $object, ['IS_AUTHENTICATED_FULLY']);
 
 RoleVoter
 ~~~~~~~~~
@@ -134,7 +134,7 @@ method::
 
     $roleVoter = new RoleVoter('ROLE_');
 
-    $roleVoter->vote($token, $object, array('ROLE_ADMIN'));
+    $roleVoter->vote($token, $object, ['ROLE_ADMIN']);
 
 RoleHierarchyVoter
 ~~~~~~~~~~~~~~~~~~
@@ -151,9 +151,9 @@ role::
     use Symfony\Component\Security\Core\Authorization\Voter\RoleHierarchyVoter;
     use Symfony\Component\Security\Core\Role\RoleHierarchy;
 
-    $hierarchy = array(
-        'ROLE_SUPER_ADMIN' => array('ROLE_ADMIN', 'ROLE_USER'),
-    );
+    $hierarchy = [
+        'ROLE_SUPER_ADMIN' => ['ROLE_ADMIN', 'ROLE_USER'],
+    ];
 
     $roleHierarchy = new RoleHierarchy($hierarchy);
 
@@ -209,7 +209,7 @@ are required for the current user to get access to the application::
 
     $accessMap = new AccessMap();
     $requestMatcher = new RequestMatcher('^/admin');
-    $accessMap->add($requestMatcher, array('ROLE_ADMIN'));
+    $accessMap->add($requestMatcher, ['ROLE_ADMIN']);
 
     $accessListener = new AccessListener(
         $securityContext,
diff --git a/components/security/firewall.rst b/components/security/firewall.rst
index 51b62c037dd..72000b4cb18 100644
--- a/components/security/firewall.rst
+++ b/components/security/firewall.rst
@@ -61,7 +61,7 @@ the user::
     $requestMatcher = new RequestMatcher('^/secured-area/');
 
     // instances of Symfony\Component\Security\Http\Firewall\ListenerInterface
-    $listeners = array(...);
+    $listeners = [...];
 
     $exceptionListener = new ExceptionListener(...);
 
@@ -80,7 +80,7 @@ with the event dispatcher that is used by the :class:`Symfony\\Component\\HttpKe
 
     $dispatcher->addListener(
         KernelEvents::REQUEST,
-        array($firewall, 'onKernelRequest')
+        [$firewall, 'onKernelRequest']
     );
 
 The firewall is registered to listen to the ``kernel.request`` event that
diff --git a/components/serializer.rst b/components/serializer.rst
index 9a568b23e87..bba2740a715 100644
--- a/components/serializer.rst
+++ b/components/serializer.rst
@@ -53,8 +53,8 @@ which encoders and normalizer are going to be available::
     use Symfony\Component\Serializer\Encoder\JsonEncoder;
     use Symfony\Component\Serializer\Normalizer\ObjectNormalizer;
 
-    $encoders = array(new XmlEncoder(), new JsonEncoder());
-    $normalizers = array(new ObjectNormalizer());
+    $encoders = [new XmlEncoder(), new JsonEncoder()];
+    $normalizers = [new ObjectNormalizer()];
 
     $serializer = new Serializer($normalizers, $encoders);
 
@@ -188,10 +188,10 @@ when constructing the normalizer::
     // because "city" is not an attribute of the Person class
     $classMetadataFactory = new ClassMetadataFactory(new AnnotationLoader(new AnnotationReader()));
     $normalizer = new ObjectNormalizer($classMetadataFactory);
-    $serializer = new Serializer(array($normalizer));
-    $person = $serializer->deserialize($data, 'Acme\Person', 'xml', array(
+    $serializer = new Serializer([$normalizer]);
+    $person = $serializer->deserialize($data, 'Acme\Person', 'xml', [
         'allow_extra_attributes' => false,
-    ));
+    ]);
 
 Deserializing in an Existing Object
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
@@ -211,7 +211,7 @@ The serializer can also be used to update an existing object::
     </person>
     EOF;
 
-    $serializer->deserialize($data, Person::class, 'xml', array('object_to_populate' => $person));
+    $serializer->deserialize($data, Person::class, 'xml', ['object_to_populate' => $person]);
     // $person = App\Model\Person(name: 'foo', age: '69', sportsperson: true)
 
 This is a common need when working with an ORM.
@@ -336,16 +336,16 @@ You are now able to serialize only attributes in the groups you want::
     $obj->setBar('bar');
 
     $normalizer = new ObjectNormalizer($classMetadataFactory);
-    $serializer = new Serializer(array($normalizer));
+    $serializer = new Serializer([$normalizer]);
 
-    $data = $serializer->normalize($obj, null, array('groups' => array('group1')));
-    // $data = array('foo' => 'foo');
+    $data = $serializer->normalize($obj, null, ['groups' => ['group1']]);
+    // $data = ['foo' => 'foo'];
 
     $obj2 = $serializer->denormalize(
-        array('foo' => 'foo', 'bar' => 'bar'),
+        ['foo' => 'foo', 'bar' => 'bar'],
         'MyObj',
         null,
-        array('groups' => array('group1', 'group3'))
+        ['groups' => ['group1', 'group3']]
     );
     // $obj2 = MyObj(foo: 'foo', bar: 'bar')
 
@@ -383,10 +383,10 @@ It is also possible to serialize only a set of specific attributes::
     $user->givenName = 'Kévin';
     $user->company = $company;
 
-    $serializer = new Serializer(array(new ObjectNormalizer()));
+    $serializer = new Serializer([new ObjectNormalizer()]);
 
-    $data = $serializer->normalize($user, null, array('attributes' => array('familyName', 'company' => ['name'])));
-    // $data = array('familyName' => 'Dunglas', 'company' => array('name' => 'Les-Tilleuls.coop'));
+    $data = $serializer->normalize($user, null, ['attributes' => ['familyName', 'company' => ['name']]]);
+    // $data = ['familyName' => 'Dunglas', 'company' => ['name' => 'Les-Tilleuls.coop']];
 
 Only attributes that are not ignored (see below) are available.
 If some serialization groups are set, only attributes allowed by those groups can be used.
@@ -411,10 +411,10 @@ method on the normalizer definition::
     use Symfony\Component\Serializer\Normalizer\ObjectNormalizer;
 
     $normalizer = new ObjectNormalizer();
-    $normalizer->setIgnoredAttributes(array('age'));
+    $normalizer->setIgnoredAttributes(['age']);
     $encoder = new JsonEncoder();
 
-    $serializer = new Serializer(array($normalizer), array($encoder));
+    $serializer = new Serializer([$normalizer], [$encoder]);
     $serializer->serialize($person, 'json'); // Output: {"name":"foo","sportsperson":false}
 
 .. _component-serializer-converting-property-names-when-serializing-and-deserializing:
@@ -471,7 +471,7 @@ and :class:`Symfony\\Component\\Serializer\\Normalizer\\PropertyNormalizer`::
     $nameConverter = new OrgPrefixNameConverter();
     $normalizer = new ObjectNormalizer(null, $nameConverter);
 
-    $serializer = new Serializer(array($normalizer), array(new JsonEncoder()));
+    $serializer = new Serializer([$normalizer], [new JsonEncoder()]);
 
     $company = new Company();
     $company->name = 'Acme Inc.';
@@ -520,7 +520,7 @@ processes::
     $normalizer->normalize($kevin);
     // ['first_name' => 'Kévin'];
 
-    $anne = $normalizer->denormalize(array('first_name' => 'Anne'), 'Person');
+    $anne = $normalizer->denormalize(['first_name' => 'Anne'], 'Person');
     // Person object with firstName: 'Anne'
 
 Serializing Boolean Attributes
@@ -552,9 +552,9 @@ When serializing, you can set a callback to format a specific object property::
             : '';
     };
 
-    $normalizer->setCallbacks(array('createdAt' => $callback));
+    $normalizer->setCallbacks(['createdAt' => $callback]);
 
-    $serializer = new Serializer(array($normalizer), array($encoder));
+    $serializer = new Serializer([$normalizer], [$encoder]);
 
     $person = new Person();
     $person->setName('cordoval');
@@ -737,7 +737,7 @@ when such a case is encountered::
 
     $organization = new Organization();
     $organization->setName('Les-Tilleuls.coop');
-    $organization->setMembers(array($member));
+    $organization->setMembers([$member]);
 
     $member->setOrganization($organization);
 
@@ -758,7 +758,7 @@ having unique identifiers::
         return $object->getName();
     });
 
-    $serializer = new Serializer(array($normalizer), array($encoder));
+    $serializer = new Serializer([$normalizer], [$encoder]);
     var_dump($serializer->serialize($org, 'json'));
     // {"name":"Les-Tilleuls.coop","members":[{"name":"K\u00e9vin", organization: "Les-Tilleuls.coop"}]}
 
@@ -843,17 +843,17 @@ The check is only done if the ``enable_max_depth`` key of the serializer context
 is set to ``true``. In the following example, the third level is not serialized
 because it is deeper than the configured maximum depth of 2::
 
-    $result = $serializer->normalize($level1, null, array('enable_max_depth' => true));
+    $result = $serializer->normalize($level1, null, ['enable_max_depth' => true]);
     /*
-    $result = array(
+    $result = [
         'foo' => 'level1',
-        'child' => array(
+        'child' => [
                 'foo' => 'level2',
-                'child' => array(
+                'child' => [
                         'child' => null,
-                    ),
-            ),
-    );
+                    ],
+            ],
+    ];
     */
 
 Handling Arrays
@@ -874,7 +874,7 @@ Serializing arrays works just like serializing a single object::
     $person2->setAge(33);
     $person2->setSportsman(true);
 
-    $persons = array($person1, $person2);
+    $persons = [$person1, $person2];
     $data = $serializer->serialize($persons, 'json');
 
     // $data contains [{"name":"foo","age":99,"sportsman":false},{"name":"bar","age":33,"sportsman":true}]
@@ -893,8 +893,8 @@ you indicate that you're expecting an array instead of a single object.
     use Symfony\Component\Serializer\Serializer;
 
     $serializer = new Serializer(
-        array(new GetSetMethodNormalizer(), new ArrayDenormalizer()),
-        array(new JsonEncoder())
+        [new GetSetMethodNormalizer(), new ArrayDenormalizer()],
+        [new JsonEncoder()]
     );
 
     $data = ...; // The serialized data from the previous example
@@ -906,7 +906,7 @@ The ``XmlEncoder``
 This encoder transforms arrays into XML and vice versa. For example, take an
 object normalized as following::
 
-    array('foo' => array(1, 2), 'bar' => true);
+    ['foo' => [1, 2], 'bar' => true];
 
 The ``XmlEncoder`` encodes this object as follows:
 
@@ -921,7 +921,7 @@ The ``XmlEncoder`` encodes this object as follows:
 
 The array keys beginning with ``@`` are considered XML attributes::
 
-    array('foo' => array('@bar' => 'value'));
+    ['foo' => ['@bar' => 'value']];
 
     // is encoded as follows:
     // <?xml version="1.0"?>
@@ -931,7 +931,7 @@ The array keys beginning with ``@`` are considered XML attributes::
 
 Use the special ``#`` key to define the data of a node::
 
-    array('foo' => array('@bar' => 'value', '#' => 'baz'));
+    ['foo' => ['@bar' => 'value', '#' => 'baz']];
 
     // is encoded as follows:
     // <?xml version="1.0"?>
@@ -1021,10 +1021,10 @@ parameter of the ``ObjectNormalizer``::
     }
 
     $normalizer = new ObjectNormalizer(null, null, null, new ReflectionExtractor());
-    $serializer = new Serializer(array(new DateTimeNormalizer(), $normalizer));
+    $serializer = new Serializer([new DateTimeNormalizer(), $normalizer]);
 
     $obj = $serializer->denormalize(
-        array('inner' => array('foo' => 'foo', 'bar' => 'bar'), 'date' => '1988/01/21'),
+        ['inner' => ['foo' => 'foo', 'bar' => 'bar'], 'date' => '1988/01/21'],
          'Acme\ObjectOuter'
     );
 
diff --git a/components/templating.rst b/components/templating.rst
index 6d8fc3dac94..bd23640d9ad 100644
--- a/components/templating.rst
+++ b/components/templating.rst
@@ -49,7 +49,7 @@ which uses the template reference to actually find and load the template::
 
     $templating = new PhpEngine(new TemplateNameParser(), $filesystemLoader);
 
-    echo $templating->render('hello.php', array('firstname' => 'Fabien'));
+    echo $templating->render('hello.php', ['firstname' => 'Fabien']);
 
 .. code-block:: html+php
 
@@ -83,9 +83,9 @@ can then be included by other templates. As the ``$view`` variable is an
 instance of ``PhpEngine``, you can use the ``render()`` method (which was used
 to render the template originally) inside the template to render another template::
 
-    <?php $names = array('Fabien', ...) ?>
+    <?php $names = ['Fabien', ...] ?>
     <?php foreach ($names as $name) : ?>
-        <?= $view->render('hello.php', array('firstname' => $name)) ?>
+        <?= $view->render('hello.php', ['firstname' => $name]) ?>
     <?php endforeach ?>
 
 Global Variables
@@ -178,7 +178,7 @@ using the Templating component. To do that, create a new class which
 implements the :class:`Symfony\\Component\\Templating\\EngineInterface`. This
 requires 3 method:
 
-* :method:`render($name, array $parameters = array()) <Symfony\\Component\\Templating\\EngineInterface::render>`
+* :method:`render($name, array $parameters = []) <Symfony\\Component\\Templating\\EngineInterface::render>`
   - Renders a template
 * :method:`exists($name) <Symfony\\Component\\Templating\\EngineInterface::exists>`
   - Checks if the template exists
@@ -200,10 +200,10 @@ method is used::
     use Symfony\Component\Templating\PhpEngine;
     use Symfony\Component\Templating\DelegatingEngine;
 
-    $templating = new DelegatingEngine(array(
+    $templating = new DelegatingEngine([
         new PhpEngine(...),
         new CustomEngine(...),
-    ));
+    ]);
 
 Learn More
 ----------
diff --git a/components/translation.rst b/components/translation.rst
index 4ee67440aef..9bff7c1a614 100644
--- a/components/translation.rst
+++ b/components/translation.rst
@@ -120,9 +120,9 @@ argument is the loader name (this was the first argument of the ``addLoader()``
 method), the second is the resource and the third argument is the locale::
 
     // ...
-    $translator->addResource('array', array(
+    $translator->addResource('array', [
         'Hello World!' => 'Bonjour',
-    ), 'fr_FR');
+    ], 'fr_FR');
 
 Loading Messages with the File Loaders
 ......................................
@@ -176,7 +176,7 @@ For (3), the fallback locales can be set by calling
 :method:`Symfony\\Component\\Translation\\Translator::setFallbackLocales`::
 
     // ...
-    $translator->setFallbackLocales(array('en'));
+    $translator->setFallbackLocales(['en']);
 
 .. _using-message-domains:
 
@@ -207,7 +207,7 @@ loaded like this::
 When translating strings that are not in the default domain (``messages``),
 you must specify the domain as the third argument of ``trans()``::
 
-    $translator->trans('Symfony is great', array(), 'admin');
+    $translator->trans('Symfony is great', [], 'admin');
 
 Symfony will now look for the message in the ``admin`` domain of the
 specified locale.
diff --git a/components/translation/custom_formats.rst b/components/translation/custom_formats.rst
index c466a526749..8856b41c006 100644
--- a/components/translation/custom_formats.rst
+++ b/components/translation/custom_formats.rst
@@ -37,7 +37,7 @@ create the catalog that will be returned::
     {
         public function load($resource, $locale, $domain = 'messages')
         {
-            $messages = array();
+            $messages = [];
             $lines = file($resource);
 
             foreach ($lines as $line) {
@@ -85,7 +85,7 @@ will save a few lines::
 
     class MyFormatDumper extends FileDumper
     {
-        public function formatCatalogue(MessageCatalogue $messages, $domain, array $options = array())
+        public function formatCatalogue(MessageCatalogue $messages, $domain, array $options = [])
         {
             $output = '';
 
@@ -122,4 +122,4 @@ YAML file are dumped into a text file with the custom format::
     $translations = $loader->load(__DIR__ . '/translations/messages.fr_FR.yml' , 'fr_FR');
 
     $dumper = new MyFormatDumper();
-    $dumper->dump($translations, array('path' => __DIR__.'/dumps'));
+    $dumper->dump($translations, ['path' => __DIR__.'/dumps']);
diff --git a/components/translation/usage.rst b/components/translation/usage.rst
index 9481109f1a9..b7883ea8182 100644
--- a/components/translation/usage.rst
+++ b/components/translation/usage.rst
@@ -11,9 +11,9 @@ Imagine you want to translate the string *"Symfony is great"* into French::
 
     $translator = new Translator('fr_FR');
     $translator->addLoader('array', new ArrayLoader());
-    $translator->addResource('array', array(
+    $translator->addResource('array', [
         'Symfony is great!' => 'Symfony est super !',
-    ), 'fr_FR');
+    ], 'fr_FR');
 
     var_dump($translator->trans('Symfony is great!'));
 
@@ -42,7 +42,7 @@ variable with a "placeholder"::
     // ...
     $translated = $translator->trans(
         'Hello %name%',
-        array('%name%' => $name)
+        ['%name%' => $name]
     );
 
     var_dump($translated);
@@ -69,9 +69,9 @@ is done just as before:
 
     .. code-block:: php
 
-        return array(
+        return [
             'Hello %name%' => 'Bonjour %name%',
-        );
+        ];
 
     .. code-block:: yaml
 
@@ -134,10 +134,10 @@ recommended format. These files are parsed by one of the loader classes.
 
     .. code-block:: php
 
-        return array(
+        return [
             'Symfony is great' => 'J\'aime Symfony',
             'symfony.great'    => 'J\'aime Symfony',
-        );
+        ];
 
 .. _translation-real-vs-keyword-messages:
 
@@ -185,20 +185,20 @@ recommended format. These files are parsed by one of the loader classes.
 
         .. code-block:: php
 
-            array(
-                'symfony' => array(
-                    'is' => array(
+            [
+                'symfony' => [
+                    'is' => [
                         'great'   => 'Symfony is great',
                         'amazing' => 'Symfony is amazing',
-                    ),
-                    'has' => array(
+                    ],
+                    'has' => [
                         'bundles' => 'Symfony has bundles',
-                    ),
+                    ],
                 ),
-                'user' => array(
+                'user' => [
                     'login' => 'Login',
-                ),
-            );
+                ],
+            ];
 
     The multiple levels are flattened into single id/translation pairs by
     adding a dot (``.``) between every level, therefore the above examples are
@@ -215,12 +215,12 @@ recommended format. These files are parsed by one of the loader classes.
 
         .. code-block:: php
 
-            return array(
+            return [
                 'symfony.is.great'    => 'Symfony is great',
                 'symfony.is.amazing'  => 'Symfony is amazing',
                 'symfony.has.bundles' => 'Symfony has bundles',
                 'user.login'          => 'Login',
-            );
+            ];
 
 .. _component-translation-pluralization:
 
@@ -264,7 +264,7 @@ To translate pluralized messages, use the
         'Hurry up %name%! There is one apple left.|There are %count% apples left.',
         10,
         // no need to include %count% here; Symfony does that for you
-        array('%name%' => $user->getName())
+        ['%name%' => $user->getName()]
     );
 
 The second argument (``10`` in this example) is the *number* of objects being
@@ -280,7 +280,7 @@ the ``%count%`` placeholder.
         $translator->transChoice(
             'There is one apple|There are %count% apples',
             10,
-            array('%count%' => 10)
+            ['%count%' => 10]
         );
 
     Starting from Symfony 3.2, when the only placeholder is ``%count%``, you
@@ -381,7 +381,7 @@ use for translation::
 
     $translator->trans(
         'Symfony is great',
-        array(),
+        [],
         'messages',
         'fr_FR'
     );
@@ -389,7 +389,7 @@ use for translation::
     $translator->transChoice(
         '{0} There are no apples|{1} There is one apple|]1,Inf[ There are %count% apples',
         10,
-        array(),
+        [],
         'messages',
         'fr_FR'
     );
@@ -403,7 +403,7 @@ use for translation::
         $translator->transChoice(
             '{0} There are no apples|{1} There is one apple|]1,Inf[ There are %count% apples',
             10,
-            array('%count%' => 10),
+            ['%count%' => 10],
             'messages',
             'fr_FR'
         );
@@ -423,15 +423,15 @@ messages. Just specify the required locale::
 
 The ``$messages`` variable will have the following structure::
 
-    array(
-        'messages' => array(
+    [
+        'messages' => [
             'Hello world' => 'Bonjour tout le monde',
-        ),
-        'validators' => array(
+        ],
+        'validators' => [
             'Value should not be empty' => 'Valeur ne doit pas être vide',
             'Value is too long' => 'Valeur est trop long',
-        ),
-    );
+        ],
+    ];
 
 Adding Notes to Translation Contents
 ------------------------------------
diff --git a/components/validator.rst b/components/validator.rst
index 78c3f56c15a..f0c4edde217 100644
--- a/components/validator.rst
+++ b/components/validator.rst
@@ -41,10 +41,10 @@ characters long::
     use Symfony\Component\Validator\Constraints\NotBlank;
 
     $validator = Validation::createValidator();
-    $violations = $validator->validate('Bernhard', array(
-        new Length(array('min' => 10)),
+    $violations = $validator->validate('Bernhard', [
+        new Length(['min' => 10]),
         new NotBlank(),
-    ));
+    ]);
 
     if (0 !== count($violations)) {
         // there are errors, now you can show them
diff --git a/components/validator/metadata.rst b/components/validator/metadata.rst
index 2b68d535b40..77c4037cc48 100755
--- a/components/validator/metadata.rst
+++ b/components/validator/metadata.rst
@@ -27,7 +27,7 @@ the ``Author`` class has at least 3 characters::
             $metadata->addPropertyConstraint('firstName', new Assert\NotBlank());
             $metadata->addPropertyConstraint(
                 'firstName',
-                new Assert\Length(array("min" => 3))
+                new Assert\Length(["min" => 3])
             );
         }
     }
@@ -58,9 +58,9 @@ Then, add the Validator component configuration to the class::
     {
         public static function loadValidatorMetadata(ClassMetadata $metadata)
         {
-            $metadata->addGetterConstraint('passwordSafe', new Assert\IsTrue(array(
+            $metadata->addGetterConstraint('passwordSafe', new Assert\IsTrue([
                 'message' => 'The password cannot match your first name',
-            )));
+            ]));
         }
     }
 
diff --git a/components/validator/resources.rst b/components/validator/resources.rst
index a567011dc77..83b4f47efa9 100644
--- a/components/validator/resources.rst
+++ b/components/validator/resources.rst
@@ -45,10 +45,10 @@ In this example, the validation metadata is retrieved executing the
         public static function loadValidatorMetadata(ClassMetadata $metadata)
         {
             $metadata->addPropertyConstraint('name', new Assert\NotBlank());
-            $metadata->addPropertyConstraint('name', new Assert\Length(array(
+            $metadata->addPropertyConstraint('name', new Assert\Length([
                 'min' => 5,
                 'max' => 20,
-            )));
+            ]));
         }
     }
 
diff --git a/components/var_dumper.rst b/components/var_dumper.rst
index 3177e830c69..97306f01ffd 100644
--- a/components/var_dumper.rst
+++ b/components/var_dumper.rst
@@ -151,7 +151,7 @@ Example::
 
         public function testWithDumpEquals()
         {
-            $testedVar = array(123, 'foo');
+            $testedVar = [123, 'foo'];
 
             $expectedDump = <<<EOTXT
     array:2 [
@@ -171,13 +171,13 @@ For simple variables, reading the output should be straightforward.
 Here are some examples showing first a variable defined in PHP,
 then its dump representation::
 
-    $var = array(
+    $var = [
         'a simple string' => "in an array of 5 elements",
         'a float' => 1.0,
         'an integer' => 1,
         'a boolean' => true,
-        'an empty array' => array(),
-    );
+        'an empty array' => [],
+    ];
     dump($var);
 
 .. image:: /_images/components/var_dumper/01-simple.png
@@ -258,11 +258,11 @@ then its dump representation::
 
 .. code-block:: php
 
-    $var = array();
+    $var = [];
     $var[0] = 1;
     $var[1] =& $var[0];
     $var[1] += 1;
-    $var[2] = array("Hard references (circular or sibling)");
+    $var[2] = ["Hard references (circular or sibling)"];
     $var[3] =& $var[2];
     $var[3][] = "are dumped using `&number` prefixes.";
     dump($var);
diff --git a/components/var_dumper/advanced.rst b/components/var_dumper/advanced.rst
index 9ee054ad30f..3846845abbf 100644
--- a/components/var_dumper/advanced.rst
+++ b/components/var_dumper/advanced.rst
@@ -202,11 +202,11 @@ method::
     $output = fopen('php://memory', 'r+b');
 
     $dumper = new HtmlDumper();
-    $dumper->dump($var, $output, array(
+    $dumper->dump($var, $output, [
         // 1 and 160 are the default values for these options
         'maxDepth' => 1,
         'maxStringLength' => 160
-    ));
+    ]);
 
 .. versionadded:: 3.2
 
@@ -242,7 +242,7 @@ next to its content:
     use Symfony\Component\VarDumper\Dumper\AbstractDumper;
     use Symfony\Component\VarDumper\Dumper\CliDumper;
 
-    $var = array('test');
+    $var = ['test'];
     $dumper = new CliDumper();
     echo $dumper->dump($var, true);
 
@@ -266,7 +266,7 @@ similar to PHP's short array notation:
     use Symfony\Component\VarDumper\Dumper\AbstractDumper;
     use Symfony\Component\VarDumper\Dumper\CliDumper;
 
-    $var = array('test');
+    $var = ['test'];
     $dumper = new CliDumper();
     echo $dumper->dump($var, true);
 
@@ -290,7 +290,7 @@ using a the logical OR operator ``|``:
     use Symfony\Component\VarDumper\Dumper\AbstractDumper;
     use Symfony\Component\VarDumper\Dumper\CliDumper;
 
-    $var = array('test');
+    $var = ['test'];
     $dumper = new CliDumper(null, null, AbstractDumper::DUMP_STRING_LENGTH | AbstractDumper::DUMP_LIGHT_ARRAY);
     echo $dumper->dump($var, true);
 
@@ -313,7 +313,7 @@ or its ``addCasters()`` method::
 
     use Symfony\Component\VarDumper\Cloner\VarCloner;
 
-    $myCasters = array(...);
+    $myCasters = [...];
     $cloner = new VarCloner($myCasters);
 
     // or
@@ -323,10 +323,10 @@ or its ``addCasters()`` method::
 The provided ``$myCasters`` argument is an array that maps a class,
 an interface or a resource type to a callable::
 
-    $myCasters = array(
+    $myCasters = [
         'FooClass' => $myFooClassCallableCaster,
         ':bar resource' => $myBarResourceCallableCaster,
-    );
+    ];
 
 As you can notice, resource types are prefixed by a ``:`` to prevent
 colliding with a class name.
diff --git a/components/yaml.rst b/components/yaml.rst
index ab44a3526a4..adce112c41f 100644
--- a/components/yaml.rst
+++ b/components/yaml.rst
@@ -102,7 +102,7 @@ string and converts it to a PHP array::
     use Symfony\Component\Yaml\Yaml;
 
     $value = Yaml::parse("foo: bar");
-    // $value = array('foo' => 'bar')
+    // $value = ['foo' => 'bar']
 
 If an error occurs during parsing, the parser throws a
 :class:`Symfony\\Component\\Yaml\\Exception\\ParseException` exception
@@ -143,10 +143,10 @@ array to its YAML representation::
 
     use Symfony\Component\Yaml\Yaml;
 
-    $array = array(
+    $array = [
         'foo' => 'bar',
-        'bar' => array('foo' => 'bar', 'bar' => 'baz'),
-    );
+        'bar' => ['foo' => 'bar', 'bar' => 'baz'],
+    ];
 
     $yaml = Yaml::dump($array);
 
@@ -274,7 +274,7 @@ You can dump objects as Yaml maps by using the ``DUMP_OBJECT_AS_MAP`` flag::
     $object = new \stdClass();
     $object->foo = 'bar';
 
-    $dumped = Yaml::dump(array('data' => $object), 2, 4, Yaml::DUMP_OBJECT_AS_MAP);
+    $dumped = Yaml::dump(['data' => $object], 2, 4, Yaml::DUMP_OBJECT_AS_MAP);
     // $dumped = "data:\n    foo: bar"
 
 And parse them by using the ``PARSE_OBJECT_FOR_MAP`` flag::
@@ -327,14 +327,14 @@ Dumping Multi-line Literal Blocks
 In YAML multiple lines can be represented as literal blocks, by default the
 dumper will encode multiple lines as an inline string::
 
-    $string = array("string" => "Multiple\nLine\nString");
+    $string = ["string" => "Multiple\nLine\nString"];
     $yaml = Yaml::dump($string);
     echo $yaml; // string: "Multiple\nLine\nString"
 
 You can make it use a literal block with the ``DUMP_MULTI_LINE_LITERAL_BLOCK``
 flag::
 
-    $string = array("string" => "Multiple\nLine\nString");
+    $string = ["string" => "Multiple\nLine\nString"];
     $yaml = Yaml::dump($string, 2, 4, Yaml::DUMP_MULTI_LINE_LITERAL_BLOCK);
     echo $yaml;
     //  string: |
@@ -351,7 +351,7 @@ syntax to parse them as proper PHP constants::
 
     $yaml = '{ foo: PHP_INT_SIZE, bar: !php/const PHP_INT_SIZE }';
     $parameters = Yaml::parse($yaml, Yaml::PARSE_CONSTANT);
-    // $parameters = array('foo' => 'PHP_INT_SIZE', 'bar' => 8);
+    // $parameters = ['foo' => 'PHP_INT_SIZE', 'bar' => 8];
 
 Parsing and Dumping of Binary Data
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
@@ -364,7 +364,7 @@ You can dump binary data by using the ``DUMP_BASE64_BINARY_DATA`` flag::
 
     $imageContents = file_get_contents(__DIR__.'/images/logo.png');
 
-    $dumped = Yaml::dump(array('logo' => $imageContents), 2, 4, Yaml::DUMP_BASE64_BINARY_DATA);
+    $dumped = Yaml::dump(['logo' => $imageContents], 2, 4, Yaml::DUMP_BASE64_BINARY_DATA);
     // logo: !!binary iVBORw0KGgoAAAANSUhEUgAAA6oAAADqCAY...
 
 Binary data is automatically parsed if they include the ``!!binary`` YAML tag
@@ -387,16 +387,16 @@ In addition to the built-in support of tags like ``!php/const`` and
 
     $data = "!my_tag { foo: bar }";
     $parsed = Yaml::parse($data, Yaml::PARSE_CUSTOM_TAGS);
-    // $parsed = Symfony\Component\Yaml\Tag\TaggedValue('my_tag', array('foo' => 'bar'));
+    // $parsed = Symfony\Component\Yaml\Tag\TaggedValue('my_tag', ['foo' => 'bar']);
     $tagName = $parsed->getTag();    // $tagName = 'my_tag'
-    $tagValue = $parsed->getValue(); // $tagValue = array('foo' => 'bar')
+    $tagValue = $parsed->getValue(); // $tagValue = ['foo' => 'bar']
 
 If the contents to dump contain :class:`Symfony\\Component\\Yaml\\Tag\\TaggedValue`
 objects, they are automatically transformed into YAML tags::
 
     use Symfony\Component\Yaml\Tag\TaggedValue;
 
-    $data = new TaggedValue('my_tag', array('foo' => 'bar'));
+    $data = new TaggedValue('my_tag', ['foo' => 'bar']);
     $dumped = Yaml::dump($data);
     // $dumped = '!my_tag { foo: bar }'
 
diff --git a/components/yaml/yaml_format.rst b/components/yaml/yaml_format.rst
index cbd2d1956ed..592d44d11cd 100644
--- a/components/yaml/yaml_format.rst
+++ b/components/yaml/yaml_format.rst
@@ -179,7 +179,7 @@ Sequences use a dash followed by a space:
 
 The previous YAML file is equivalent to the following PHP code::
 
-    array('PHP', 'Perl', 'Python');
+    ['PHP', 'Perl', 'Python'];
 
 Mappings use a colon followed by a space (``:`` ) to mark each key/value pair:
 
@@ -191,7 +191,7 @@ Mappings use a colon followed by a space (``:`` ) to mark each key/value pair:
 
 which is equivalent to this PHP code::
 
-    array('PHP' => 5.2, 'MySQL' => 5.1, 'Apache' => '2.2.20');
+    ['PHP' => 5.2, 'MySQL' => 5.1, 'Apache' => '2.2.20'];
 
 .. note::
 
@@ -218,16 +218,16 @@ YAML uses indentation with one or more spaces to describe nested collections:
 
 The above YAML is equivalent to the following PHP code::
 
-    array(
-        'symfony 1.0' => array(
+    [
+        'symfony 1.0' => [
             'PHP'    => 5.0,
             'Propel' => 1.2,
-        ),
-        'symfony 1.2' => array(
+        ],
+        'symfony 1.2' => [
             'PHP'    => 5.2,
             'Propel' => 1.3,
-        ),
-    );
+        ],
+    ];
 
 There is one important thing you need to remember when using indentation in a
 YAML file: *Indentation must be done with one or more spaces, but never with
diff --git a/configuration.rst b/configuration.rst
index e6a4358210a..e972de44e31 100644
--- a/configuration.rst
+++ b/configuration.rst
@@ -74,19 +74,19 @@ The main configuration file is called ``config.yml``:
         $this->import('security.yml');
         $this->import('services.yml');
 
-        $container->loadFromExtension('framework', array(
+        $container->loadFromExtension('framework', [
             'secret' => '%secret%',
-            'router' => array(
+            'router' => [
                 'resource' => '%kernel.project_dir%/app/config/routing.php',
-            ),
+            ],
             // ...
-        ));
+        ]);
 
         // Twig Configuration
-        $container->loadFromExtension('twig', array(
+        $container->loadFromExtension('twig', [
             'debug'            => '%kernel.debug%',
             'strict_variables' => '%kernel.debug%',
-        ));
+        ]);
 
         // ...
 
@@ -276,10 +276,10 @@ key:
 
         $container->setParameter('locale', 'en');
 
-        $container->loadFromExtension('framework', array(
+        $container->loadFromExtension('framework', [
             'default_locale' => '%locale%',
             // ...
-        ));
+        ]);
 
         // ...
 
@@ -349,15 +349,15 @@ configure DoctrineBundle and other parts of Symfony:
     .. code-block:: php
 
         // app/config/config.php
-        $container->loadFromExtension('doctrine', array(
-            'dbal' => array(
+        $container->loadFromExtension('doctrine', [
+            'dbal' => [
                 'driver'   => 'pdo_mysql',
                 // ...
 
                 'user'     => '%database_user%',
                 'password' => '%database_password%',
-            ),
-        ));
+            ],
+        ]);
 
 But the ``parameters.yml`` file *is* special: it defines the values that usually
 change on each server. For example, the database credentials on your local
diff --git a/configuration/environments.rst b/configuration/environments.rst
index abc5ab13e33..eadb3f8beb6 100644
--- a/configuration/environments.rst
+++ b/configuration/environments.rst
@@ -135,10 +135,10 @@ configuration file:
         // app/config/config_dev.php
         $loader->import('config.php');
 
-        $container->loadFromExtension('web_profiler', array(
+        $container->loadFromExtension('web_profiler', [
             'toolbar' => true,
             // ...
-        ));
+        ]);
 
 .. index::
    single: Environments; Executing different environments
@@ -235,13 +235,13 @@ this code and changing the environment string.
 
         .. code-block:: php
 
-            $container->loadFromExtension('doctrine', array(
-                'dbal' => array(
+            $container->loadFromExtension('doctrine', [
+                'dbal' => [
                     'logging'  => '%kernel.debug%',
                     // ...
-                ),
+                ],
                 // ...
-            ));
+            ]);
 
 Selecting the Environment for Console Commands
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
@@ -333,9 +333,9 @@ The best way to accomplish this is via a new environment called, for example,
         // app/config/config_benchmark.php
         $loader->import('config_prod.php');
 
-        $container->loadFromExtension('framework', array(
-            'profiler' => array('only_exceptions' => false),
-        ));
+        $container->loadFromExtension('framework', [
+            'profiler' => ['only_exceptions' => false],
+        ]);
 
 .. include:: /components/dependency_injection/_imports-parameters-note.rst.inc
 
@@ -371,7 +371,7 @@ The new environment is now accessible via::
     aren't accessible, the front controller is usually protected from external
     IP addresses via the following code at the top of the controller::
 
-        if (!in_array(@$_SERVER['REMOTE_ADDR'], array('127.0.0.1', '::1'))) {
+        if (!in_array(@$_SERVER['REMOTE_ADDR'], ['127.0.0.1', '::1'])) {
             die('You are not allowed to access this file. Check '.basename(__FILE__).' for more information.');
         }
 
diff --git a/configuration/external_parameters.rst b/configuration/external_parameters.rst
index 9e346f22cd4..7c08b001a2d 100644
--- a/configuration/external_parameters.rst
+++ b/configuration/external_parameters.rst
@@ -58,11 +58,11 @@ variable in your service container configuration, you can reference it using
     .. code-block:: php
 
         // app/config/config.php
-        $container->loadFromExtension('doctrine', array(
-            'dbal' => array(
+        $container->loadFromExtension('doctrine', [
+            'dbal' => [
                 'host' => '%env(DATABASE_HOST)%',
-            ),
-        ));
+            ],
+        ]);
 
 You can also give the ``env()`` parameters a default value: the default value
 will be used whenever the corresponding environment variable is *not* found:
@@ -183,11 +183,11 @@ turn the value of the ``HTTP_PORT`` env var into an integer:
     .. code-block:: php
 
         // config/packages/framework.php
-        $container->loadFromExtension('framework', array(
-            'router' => array(
+        $container->loadFromExtension('framework', [
+            'router' => [
                 'http_port' => '%env(int:HTTP_PORT)%',
-            ),
-        ));
+            ],
+        ]);
 
 Symfony provides the following env var processors:
 
@@ -227,9 +227,9 @@ Symfony provides the following env var processors:
 
             // config/packages/framework.php
             $container->setParameter('env(SECRET)', 'some_secret');
-            $container->loadFromExtension('framework', array(
+            $container->loadFromExtension('framework', [
                 'secret' => '%env(string:SECRET)%',
-            ));
+            ]);
 
 ``env(bool:FOO)``
     Casts ``FOO`` to a bool:
@@ -267,9 +267,9 @@ Symfony provides the following env var processors:
 
             // config/packages/framework.php
             $container->setParameter('env(HTTP_METHOD_OVERRIDE)', 'true');
-            $container->loadFromExtension('framework', array(
+            $container->loadFromExtension('framework', [
                 'http_method_override' => '%env(bool:HTTP_METHOD_OVERRIDE)%',
-            ));
+            ]);
 
 ``env(int:FOO)``
     Casts ``FOO`` to an int.
@@ -314,14 +314,14 @@ Symfony provides the following env var processors:
 
             // config/packages/security.php
             $container->setParameter('env(HEALTH_CHECK_METHOD)', 'Symfony\Component\HttpFoundation\Request::METHOD_HEAD');
-            $container->loadFromExtension('security', array(
-                'access_control' => array(
-                    array(
+            $container->loadFromExtension('security', [
+                'access_control' => [
+                    [
                         'path' => '^/health-check$',
                         'methods' => '%env(const:HEALTH_CHECK_METHOD)%',
-                    ),
-                ),
-            ));
+                    ],
+                ],
+            ]);
 
 ``env(base64:FOO)``
     Decodes the content of ``FOO``, which is a base64 encoded string.
@@ -363,9 +363,9 @@ Symfony provides the following env var processors:
 
             // config/packages/framework.php
             $container->setParameter('env(TRUSTED_HOSTS)', '["10.0.0.1", "10.0.0.2"]');
-            $container->loadFromExtension('framework', array(
+            $container->loadFromExtension('framework', [
                 'trusted_hosts' => '%env(json:TRUSTED_HOSTS)%',
-            ));
+            ]);
 
 ``env(resolve:FOO)``
     Replaces the string ``FOO`` by the value of a config parameter with the
@@ -404,9 +404,9 @@ Symfony provides the following env var processors:
             // config/packages/sentry.php
             $container->setParameter('env(HOST)', '10.0.0.1');
             $container->setParameter('env(SENTRY_DSN)', 'http://%env(HOST)%/project');
-            $container->loadFromExtension('sentry', array(
+            $container->loadFromExtension('sentry', [
                 'dsn' => '%env(resolve:SENTRY_DSN)%',
-            ));
+            ]);
 
 ``env(file:FOO)``
     Returns the contents of a file whose path is the value of the ``FOO`` env var:
@@ -444,9 +444,9 @@ Symfony provides the following env var processors:
 
             // config/packages/framework.php
             $container->setParameter('env(AUTH_FILE)', '../config/auth.json');
-            $container->loadFromExtension('google', array(
+            $container->loadFromExtension('google', [
                 'auth' => '%env(file:AUTH_FILE)%',
-            ));
+            ]);
 
 It is also possible to combine any number of processors:
 
diff --git a/configuration/micro_kernel_trait.rst b/configuration/micro_kernel_trait.rst
index 3e07e117a8b..f43a0f1c054 100644
--- a/configuration/micro_kernel_trait.rst
+++ b/configuration/micro_kernel_trait.rst
@@ -40,17 +40,17 @@ Next, create an ``index.php`` file that creates a kernel class and executes it::
 
         public function registerBundles()
         {
-            return array(
+            return [
                 new Symfony\Bundle\FrameworkBundle\FrameworkBundle()
-            );
+            ];
         }
 
         protected function configureContainer(ContainerBuilder $c, LoaderInterface $loader)
         {
             // PHP equivalent of config.yml
-            $c->loadFromExtension('framework', array(
+            $c->loadFromExtension('framework', [
                 'secret' => 'S0ME_SECRET'
-            ));
+            ]);
         }
 
         protected function configureRoutes(RouteCollectionBuilder $routes)
@@ -62,9 +62,9 @@ Next, create an ``index.php`` file that creates a kernel class and executes it::
 
         public function randomAction($limit)
         {
-            return new JsonResponse(array(
+            return new JsonResponse([
                 'number' => rand(0, $limit)
-            ));
+            ]);
         }
     }
 
@@ -144,7 +144,7 @@ hold the kernel. Now it looks like this::
     // require Composer's autoloader
     $loader = require __DIR__.'/../vendor/autoload.php';
     // auto-load annotations
-    AnnotationRegistry::registerLoader(array($loader, 'loadClass'));
+    AnnotationRegistry::registerLoader([$loader, 'loadClass']);
 
     class AppKernel extends Kernel
     {
@@ -152,10 +152,10 @@ hold the kernel. Now it looks like this::
 
         public function registerBundles()
         {
-            $bundles = array(
+            $bundles = [
                 new Symfony\Bundle\FrameworkBundle\FrameworkBundle(),
                 new Symfony\Bundle\TwigBundle\TwigBundle(),
-            );
+            ];
 
             if ($this->getEnvironment() == 'dev') {
                 $bundles[] = new Symfony\Bundle\WebProfilerBundle\WebProfilerBundle();
@@ -170,10 +170,10 @@ hold the kernel. Now it looks like this::
 
             // configure WebProfilerBundle only if the bundle is enabled
             if (isset($this->bundles['WebProfilerBundle'])) {
-                $c->loadFromExtension('web_profiler', array(
+                $c->loadFromExtension('web_profiler', [
                     'toolbar' => true,
                     'intercept_redirects' => false,
-                ));
+                ]);
             }
         }
 
@@ -243,15 +243,15 @@ because the configuration started to get bigger:
     .. code-block:: php
 
         // app/config/config.php
-        $container->loadFromExtension('framework', array(
+        $container->loadFromExtension('framework', [
             'secret' => 'S0ME_SECRET',
-            'templating' => array(
-                'engines' => array('twig'),
-            ),
-            'profiler' => array(
+            'templating' => [
+                'engines' => ['twig'],
+            ],
+            'profiler' => [
                 'only_exceptions' => false,
-            ),
-        ));
+            ],
+        ]);
 
 This also loads annotation routes from an ``src/App/Controller/`` directory, which
 has one file in it::
@@ -271,9 +271,9 @@ has one file in it::
         {
             $number = rand(0, $limit);
 
-            return $this->render('micro/random.html.twig', array(
+            return $this->render('micro/random.html.twig', [
                 'number' => $number
-            ));
+            ]);
         }
     }
 
diff --git a/configuration/override_dir_structure.rst b/configuration/override_dir_structure.rst
index 7eb24df6e84..e757cb87b2e 100644
--- a/configuration/override_dir_structure.rst
+++ b/configuration/override_dir_structure.rst
@@ -127,11 +127,11 @@ define your own templates directory (or directories):
     .. code-block:: php
 
         // app/config/config.php
-        $container->loadFromExtension('twig', array(
-            'paths' => array(
+        $container->loadFromExtension('twig', [
+            'paths' => [
                 '%kernel.project_dir%/templates',
-            ),
-        ));
+            ],
+        ]);
 
 .. _override-web-dir:
 
@@ -206,10 +206,10 @@ You also need to change the ``extra.symfony-web-dir`` option in the
             // app/config/config.php
 
             // ...
-            $container->loadFromExtension('assetic', array(
+            $container->loadFromExtension('assetic', [
                 // ...
                 'read_from' => '%kernel.project_dir%/../public_html',
-            ));
+            ]);
 
     Now you just need to clear the cache and dump the assets again and your
     application should work:
diff --git a/configuration/using_parameters_in_dic.rst b/configuration/using_parameters_in_dic.rst
index 4d45d7738c2..4162c0c145c 100644
--- a/configuration/using_parameters_in_dic.rst
+++ b/configuration/using_parameters_in_dic.rst
@@ -70,19 +70,19 @@ Now, examine the results to see this closely:
 
     .. code-block:: php
 
-        $container->loadFromExtension('my_bundle', array(
+        $container->loadFromExtension('my_bundle', [
                 'logging' => true,
                 // true, as expected
             )
-        );
+        ];
 
-        $container->loadFromExtension('my_bundle', array(
+        $container->loadFromExtension('my_bundle', [
                 'logging' => "%kernel.debug%",
                 // true/false (depends on 2nd parameter of AppKernel),
                 // as expected, because %kernel.debug% inside configuration
                 // gets evaluated before being passed to the extension
             )
-        );
+        ];
 
         $container->loadFromExtension('my_bundle');
         // passes the string "%kernel.debug%".
diff --git a/console.rst b/console.rst
index 477d301593b..857c6c81431 100644
--- a/console.rst
+++ b/console.rst
@@ -285,7 +285,7 @@ console::
 
             $command = $application->find('app:create-user');
             $commandTester = new CommandTester($command);
-            $commandTester->execute(array(
+            $commandTester->execute([
                 'command'  => $command->getName(),
 
                 // pass arguments to the helper
@@ -293,7 +293,7 @@ console::
 
                 // prefix the key with two dashes when passing options,
                 // e.g: '--some-option' => 'option_value',
-            ));
+            ]);
 
             // the output of the command in the console
             $output = $commandTester->getDisplay();
diff --git a/console/calling_commands.rst b/console/calling_commands.rst
index e8add467783..5d4c3d55e42 100644
--- a/console/calling_commands.rst
+++ b/console/calling_commands.rst
@@ -19,11 +19,11 @@ Calling a command from another one is straightforward::
     {
         $command = $this->getApplication()->find('demo:greet');
 
-        $arguments = array(
+        $arguments = [
             'command' => 'demo:greet',
             'name'    => 'Fabien',
             '--yell'  => true,
-        );
+        ];
 
         $greetInput = new ArrayInput($arguments);
         $returnCode = $command->run($greetInput, $output);
diff --git a/console/coloring.rst b/console/coloring.rst
index 2793a709fd5..a5b3adf8dfa 100644
--- a/console/coloring.rst
+++ b/console/coloring.rst
@@ -40,7 +40,7 @@ It is possible to define your own styles using the
     use Symfony\Component\Console\Formatter\OutputFormatterStyle;
 
     // ...
-    $outputStyle = new OutputFormatterStyle('red', 'yellow', array('bold', 'blink'));
+    $outputStyle = new OutputFormatterStyle('red', 'yellow', ['bold', 'blink']);
     $output->getFormatter()->setStyle('fire', $outputStyle);
 
     $output->writeln('<fire>foo</fire>');
diff --git a/console/command_in_controller.rst b/console/command_in_controller.rst
index e01706fdfba..bef73d3b0aa 100644
--- a/console/command_in_controller.rst
+++ b/console/command_in_controller.rst
@@ -41,13 +41,13 @@ Run this command from inside your controller via::
             $application = new Application($kernel);
             $application->setAutoExit(false);
 
-            $input = new ArrayInput(array(
+            $input = new ArrayInput([
                'command' => 'swiftmailer:spool:send',
                // (optional) define the value of command arguments
                'fooArgument' => 'barValue',
                // (optional) pass options to the command
                '--message-limit' => $messages,
-            ));
+            ]);
 
             // You can use NullOutput() if you don't need the output
             $output = new BufferedOutput();
diff --git a/console/commands_as_services.rst b/console/commands_as_services.rst
index 1f35663c454..6957cbd4b5d 100644
--- a/console/commands_as_services.rst
+++ b/console/commands_as_services.rst
@@ -126,7 +126,7 @@ Or set the ``command`` attribute on the ``console.command`` tag in your service
 
         $container
             ->register(SunshineCommand::class)
-            ->addTag('console.command', array('command' => 'app:sunshine'))
+            ->addTag('console.command', ['command' => 'app:sunshine'])
         ;
 
 .. note::
diff --git a/console/input.rst b/console/input.rst
index fdc9e4e9239..2f570e73d4d 100644
--- a/console/input.rst
+++ b/console/input.rst
@@ -220,7 +220,7 @@ You can combine ``VALUE_IS_ARRAY`` with ``VALUE_REQUIRED`` or
             null,
             InputOption::VALUE_REQUIRED | InputOption::VALUE_IS_ARRAY,
             'Which colors do you like?',
-            array('blue', 'red')
+            ['blue', 'red']
         );
 
 Options with optional arguments
diff --git a/console/lazy_commands.rst b/console/lazy_commands.rst
index 5d1d124a593..9c4e9585e07 100644
--- a/console/lazy_commands.rst
+++ b/console/lazy_commands.rst
@@ -21,9 +21,9 @@ which will be responsible for returning ``Command`` instances::
     use Symfony\Component\Console\Application;
     use Symfony\Component\Console\CommandLoader\FactoryCommandLoader;
 
-    $commandLoader = new FactoryCommandLoader(array(
+    $commandLoader = new FactoryCommandLoader([
         'app:heavy' => function () { return new HeavyCommand(); },
-    ));
+    ]);
 
     $application = new Application();
     $application->setCommandLoader($commandLoader);
@@ -51,10 +51,10 @@ array of ``Command`` factories as its only constructor argument::
 
     use Symfony\Component\Console\CommandLoader\FactoryCommandLoader;
 
-    $commandLoader = new FactoryCommandLoader(array(
+    $commandLoader = new FactoryCommandLoader([
         'app:foo' => function () { return new FooCommand(); },
-        'app:bar' => array(BarCommand::class, 'create'),
-    ));
+        'app:bar' => [BarCommand::class, 'create'],
+    ]);
 
 Factories can be any PHP callable and will be executed each time
 :method:`Symfony\\Component\\Console\\CommandLoader\\FactoryCommandLoader::get`
@@ -76,9 +76,9 @@ with command names as keys and service identifiers as values::
     $containerBuilder->register(FooCommand::class, FooCommand::class);
     $containerBuilder->compile();
 
-    $commandLoader = new ContainerCommandLoader($containerBuilder, array(
+    $commandLoader = new ContainerCommandLoader($containerBuilder, [
         'app:foo' => FooCommand::class,
-    ));
+    ]);
 
 Like this, executing the ``app:foo`` command will load the ``FooCommand`` service
 by calling ``$containerBuilder->get(FooCommand::class)``.
diff --git a/console/request_context.rst b/console/request_context.rst
index 2cdac8cb9a7..06b8a338b99 100644
--- a/console/request_context.rst
+++ b/console/request_context.rst
@@ -88,7 +88,7 @@ from the ``router`` service and override its settings::
             $context->setScheme('https');
             $context->setBaseUrl('my/path');
 
-            $url = $router->generate('route-name', array('param-name' => 'param-value'));
+            $url = $router->generate('route-name', ['param-name' => 'param-value']);
             // ...
         }
     }
diff --git a/console/style.rst b/console/style.rst
index caa61737132..9f84081278c 100644
--- a/console/style.rst
+++ b/console/style.rst
@@ -23,11 +23,11 @@ Consider for example the code used to display the title of the following command
 
         protected function execute(InputInterface $input, OutputInterface $output)
         {
-            $output->writeln(array(
+            $output->writeln([
                 '<info>Lorem Ipsum Dolor Sit Amet</>',
                 '<info>==========================</>',
                 '',
-            ));
+            ]);
 
             // ...
         }
@@ -113,31 +113,31 @@ Content Methods
         // ...
 
         // consider using arrays when displaying long messages
-        $io->text(array(
+        $io->text([
             'Lorem ipsum dolor sit amet',
             'Consectetur adipiscing elit',
             'Aenean sit amet arcu vitae sem faucibus porta',
-        ));
+        ]);
 
 :method:`Symfony\\Component\\Console\\Style\\SymfonyStyle::listing`
     It displays an unordered list of elements passed as an array::
 
-        $io->listing(array(
+        $io->listing([
             'Element #1 Lorem ipsum dolor sit amet',
             'Element #2 Lorem ipsum dolor sit amet',
             'Element #3 Lorem ipsum dolor sit amet',
-        ));
+        ]);
 
 :method:`Symfony\\Component\\Console\\Style\\SymfonyStyle::table`
     It displays the given array of headers and rows as a compact table::
 
         $io->table(
-            array('Header 1', 'Header 2'),
-            array(
-                array('Cell 1-1', 'Cell 1-2'),
-                array('Cell 2-1', 'Cell 2-2'),
-                array('Cell 3-1', 'Cell 3-2'),
-            )
+            ['Header 1', 'Header 2'],
+            [
+                ['Cell 1-1', 'Cell 1-2'],
+                ['Cell 2-1', 'Cell 2-2'],
+                ['Cell 3-1', 'Cell 3-2'],
+            ]
         );
 
 :method:`Symfony\\Component\\Console\\Style\\SymfonyStyle::newLine`
@@ -165,11 +165,11 @@ Admonition Methods
         // ...
 
         // consider using arrays when displaying long notes
-        $io->note(array(
+        $io->note([
             'Lorem ipsum dolor sit amet',
             'Consectetur adipiscing elit',
             'Aenean sit amet arcu vitae sem faucibus porta',
-        ));
+        ]);
 
 :method:`Symfony\\Component\\Console\\Style\\SymfonyStyle::caution`
     Similar to the ``note()`` helper, but the contents are more prominently
@@ -182,11 +182,11 @@ Admonition Methods
         // ...
 
         // consider using arrays when displaying long caution messages
-        $io->caution(array(
+        $io->caution([
             'Lorem ipsum dolor sit amet',
             'Consectetur adipiscing elit',
             'Aenean sit amet arcu vitae sem faucibus porta',
-        ));
+        ]);
 
 Progress Bar Methods
 ~~~~~~~~~~~~~~~~~~~~
@@ -271,12 +271,12 @@ User Input Methods
     It asks a question whose answer is constrained to the given list of valid
     answers::
 
-        $io->choice('Select the queue to analyze', array('queue1', 'queue2', 'queue3'));
+        $io->choice('Select the queue to analyze', ['queue1', 'queue2', 'queue3']);
 
     You can pass the default value as the third argument so the user can simply
     hit the <Enter> key to select that value::
 
-        $io->choice('Select the queue to analyze', array('queue1', 'queue2', 'queue3'), 'queue1');
+        $io->choice('Select the queue to analyze', ['queue1', 'queue2', 'queue3'], 'queue1');
 
 Result Methods
 ~~~~~~~~~~~~~~
@@ -293,10 +293,10 @@ Result Methods
         // ...
 
         // consider using arrays when displaying long success messages
-        $io->success(array(
+        $io->success([
             'Lorem ipsum dolor sit amet',
             'Consectetur adipiscing elit',
-        ));
+        ]);
 
 :method:`Symfony\\Component\\Console\\Style\\SymfonyStyle::warning`
     It displays the given string or array of strings highlighted as a warning
@@ -310,10 +310,10 @@ Result Methods
         // ...
 
         // consider using arrays when displaying long warning messages
-        $io->warning(array(
+        $io->warning([
             'Lorem ipsum dolor sit amet',
             'Consectetur adipiscing elit',
-        ));
+        ]);
 
 :method:`Symfony\\Component\\Console\\Style\\SymfonyStyle::error`
     It displays the given string or array of strings highlighted as an error
@@ -327,10 +327,10 @@ Result Methods
         // ...
 
         // consider using arrays when displaying long error messages
-        $io->error(array(
+        $io->error([
             'Lorem ipsum dolor sit amet',
             'Consectetur adipiscing elit',
-        ));
+        ]);
 
 Defining your Own Styles
 ------------------------
diff --git a/console/verbosity.rst b/console/verbosity.rst
index be42fac5e81..c16737c2b61 100644
--- a/console/verbosity.rst
+++ b/console/verbosity.rst
@@ -53,10 +53,10 @@ level. For example::
         {
             $user = new User(...);
 
-            $output->writeln(array(
+            $output->writeln([
                 'Username: '.$input->getArgument('username'),
                 'Password: '.$input->getArgument('password'),
-            ));
+            ]);
 
             // available methods: ->isQuiet(), ->isVerbose(), ->isVeryVerbose(), ->isDebug()
             if ($output->isVerbose()) {
diff --git a/contributing/code/standards.rst b/contributing/code/standards.rst
index f734ec7946a..8b28f2d64a7 100644
--- a/contributing/code/standards.rst
+++ b/contributing/code/standards.rst
@@ -86,12 +86,12 @@ short example containing most features described below:
          *
          * @throws \RuntimeException When an invalid option is provided
          */
-        private function transformText($dummy, array $options = array())
+        private function transformText($dummy, array $options = [])
         {
-            $defaultOptions = array(
+            $defaultOptions = [
                 'some_default' => 'values',
                 'another_default' => 'more values',
-            );
+            ];
 
             foreach ($options as $option) {
                 if (!in_array($option, $defaultOptions)) {
diff --git a/contributing/community/review-comments.rst b/contributing/community/review-comments.rst
index a317c12fa27..d64ceb880d0 100644
--- a/contributing/community/review-comments.rst
+++ b/contributing/community/review-comments.rst
@@ -113,7 +113,7 @@ If a piece of code is in fact wrong, explain why:
 
     * I profiled this change and it hurts performance significantly (if you don't profile, it's an opinion, so we can ignore)
 
-    * Code doesn't match Symfony's CS rules (e.g. ``use array()`` instead of ``[]``)
+    * Code doesn't match Symfony's CS rules (e.g. use ``[]`` instead of ``array()``)
 
     * We only provide integration with very popular projects (e.g. we integrate Bootstrap but not your own CSS framework)
 
diff --git a/controller.rst b/controller.rst
index bf2c879e882..48668f8ae85 100644
--- a/controller.rst
+++ b/controller.rst
@@ -167,7 +167,7 @@ Generating URLs
 The :method:`Symfony\\Bundle\\FrameworkBundle\\Controller\\Controller::generateUrl`
 method is just a helper method that generates the URL for a given route::
 
-    $url = $this->generateUrl('blog_show', array('slug' => 'slug-value'));
+    $url = $this->generateUrl('blog_show', ['slug' => 'slug-value']);
 
 Redirecting
 ~~~~~~~~~~~
@@ -181,10 +181,10 @@ and ``redirect()`` methods::
         return $this->redirectToRoute('homepage');
 
         // does a permanent - 301 redirect
-        return $this->redirectToRoute('homepage', array(), 301);
+        return $this->redirectToRoute('homepage', [], 301);
 
         // redirects to a route with parameters
-        return $this->redirectToRoute('blog_show', array('slug' => 'my-page'));
+        return $this->redirectToRoute('blog_show', ['slug' => 'my-page']);
 
         // redirects to a route and mantains the original query string parameters
         return $this->redirectToRoute('blog_show', $request->query->all());
@@ -227,15 +227,15 @@ method renders a template **and** puts that content into a ``Response``
 object for you::
 
     // renders app/Resources/views/lucky/number.html.twig
-    return $this->render('lucky/number.html.twig', array('number' => $number));
+    return $this->render('lucky/number.html.twig', ['number' => $number]);
 
 Templates can also live in deeper sub-directories. Just try to avoid
 creating unnecessarily deep structures::
 
     // renders app/Resources/views/lottery/lucky/number.html.twig
-    return $this->render('lottery/lucky/number.html.twig', array(
+    return $this->render('lottery/lucky/number.html.twig', [
         'number' => $number,
-    ));
+    ]);
 
 The Symfony templating system and Twig are explained more in the
 :doc:`Creating and Using Templates article </templating>`.
@@ -329,9 +329,9 @@ the argument by its name:
 
         $container->register(LuckyController::class)
             ->setPublic(true)
-            ->setBindings(array(
+            ->setBindings([
                 '$logger' => new Reference('monolog.logger.doctrine'),
-            ))
+            ])
         ;
 
 You can of course also use normal :ref:`constructor injection <services-constructor-injection>`
@@ -484,7 +484,7 @@ type-hint to your argument and Symfony will provide you with a session::
         $foobar = $session->get('foobar');
 
         // uses a default value if the attribute doesn't exist
-        $filters = $session->get('filters', array());
+        $filters = $session->get('filters', []);
     }
 
 Stored attributes remain in the session for the remainder of that user's session.
@@ -590,7 +590,7 @@ the ``Request`` class::
     {
         $request->isXmlHttpRequest(); // is it an Ajax request?
 
-        $request->getPreferredLanguage(array('en', 'fr'));
+        $request->getPreferredLanguage(['en', 'fr']);
 
         // retrieves GET and POST variables respectively
         $request->query->get('page');
@@ -658,10 +658,10 @@ This returns a special ``JsonResponse`` object that encodes the data automatical
     public function indexAction()
     {
         // returns '{"username":"jane.doe"}' and sets the proper Content-Type header
-        return $this->json(array('username' => 'jane.doe'));
+        return $this->json(['username' => 'jane.doe']);
 
         // the shortcut defines three optional arguments
-        // return $this->json($data, $status = 200, $headers = array(), $context = array());
+        // return $this->json($data, $status = 200, $headers = [], $context = []);
     }
 
 If the :doc:`serializer service </serializer>` is enabled in your
diff --git a/controller/argument_value_resolver.rst b/controller/argument_value_resolver.rst
index b7c9aad74c4..5aae993f2e9 100644
--- a/controller/argument_value_resolver.rst
+++ b/controller/argument_value_resolver.rst
@@ -104,12 +104,12 @@ type-hinted method arguments:
     .. code-block:: php
 
         // app/config/config.php
-        $container->loadFromExtension('sensio_framework_extra', array(
-            'request' => array(
+        $container->loadFromExtension('sensio_framework_extra', [
+            'request' => [
                 'converters' => true,
                 'auto_convert' => false,
-            ),
-        ));
+            ],
+        ]);
 
 Adding a new value resolver requires creating a class that implements
 :class:`Symfony\\Component\\HttpKernel\\Controller\\ArgumentValueResolverInterface`
@@ -219,7 +219,7 @@ and adding a priority.
         use AppBundle\ArgumentResolver\UserValueResolver;
 
         $container->autowire(UserValueResolver::class)
-            ->addTag('controller.argument_value_resolver', array('priority' => 50));
+            ->addTag('controller.argument_value_resolver', ['priority' => 50]);
 
 While adding a priority is optional, it's recommended to add one to make sure
 the expected value is injected. The ``RequestAttributeValueResolver`` has a
diff --git a/controller/error_pages.rst b/controller/error_pages.rst
index b2e45950e10..2ff82a3c382 100644
--- a/controller/error_pages.rst
+++ b/controller/error_pages.rst
@@ -230,10 +230,10 @@ configuration option to point to it:
     .. code-block:: php
 
         // app/config/config.php
-        $container->loadFromExtension('twig', array(
+        $container->loadFromExtension('twig', [
             'exception_controller' => 'AppBundle:Exception:showException',
             // ...
-        ));
+        ]);
 
 The :class:`Symfony\\Component\\HttpKernel\\EventListener\\ExceptionListener`
 class used by the TwigBundle as a listener of the ``kernel.exception`` event creates
diff --git a/controller/forwarding.rst b/controller/forwarding.rst
index df8a4c685b1..cf727128436 100644
--- a/controller/forwarding.rst
+++ b/controller/forwarding.rst
@@ -13,10 +13,10 @@ from *that* controller::
 
     public function indexAction($name)
     {
-        $response = $this->forward('AppBundle:Something:fancy', array(
+        $response = $this->forward('AppBundle:Something:fancy', [
             'name'  => $name,
             'color' => 'green',
-        ));
+        ]);
 
         // ... further modify the response or return it directly
 
diff --git a/controller/service.rst b/controller/service.rst
index de890956973..c7a044bec33 100644
--- a/controller/service.rst
+++ b/controller/service.rst
@@ -64,9 +64,9 @@ syntax:
     .. code-block:: php
 
         // app/config/routing.php
-        $collection->add('hello', new Route('/hello', array(
+        $collection->add('hello', new Route('/hello', [
             '_controller' => 'app.hello_controller:indexAction',
-        )));
+        ]));
 
 .. note::
 
@@ -116,7 +116,7 @@ service and use it directly::
         {
             $content = $this->twig->render(
                 'hello/index.html.twig',
-                array('name' => $name)
+                ['name' => $name]
             );
 
             return new Response($content);
diff --git a/controller/soap_web_service.rst b/controller/soap_web_service.rst
index ec54c5a9f0d..d531613f14c 100644
--- a/controller/soap_web_service.rst
+++ b/controller/soap_web_service.rst
@@ -101,7 +101,7 @@ route ``/soap``::
 
     $soapClient = new \SoapClient('http://example.com/app.php/soap?wsdl');
 
-    $result = $soapClient->call('hello', array('name' => 'Scott'));
+    $result = $soapClient->call('hello', ['name' => 'Scott']);
 
 An example WSDL is below.
 
diff --git a/controller/upload_file.rst b/controller/upload_file.rst
index 8eded88cb70..4c853d8c8f3 100644
--- a/controller/upload_file.rst
+++ b/controller/upload_file.rst
@@ -66,16 +66,16 @@ Then, add a new ``brochure`` field to the form that manages the ``Product`` enti
         {
             $builder
                 // ...
-                ->add('brochure', FileType::class, array('label' => 'Brochure (PDF file)'))
+                ->add('brochure', FileType::class, ['label' => 'Brochure (PDF file)'])
                 // ...
             ;
         }
 
         public function configureOptions(OptionsResolver $resolver)
         {
-            $resolver->setDefaults(array(
+            $resolver->setDefaults([
                 'data_class' => Product::class,
-            ));
+            ]);
         }
     }
 
@@ -143,9 +143,9 @@ Finally, you need to update the code of the controller that handles the form::
                 return $this->redirect($this->generateUrl('app_product_list'));
             }
 
-            return $this->render('product/new.html.twig', array(
+            return $this->render('product/new.html.twig', [
                 'form' => $form->createView(),
-            ));
+            ]);
         }
 
         /**
@@ -414,12 +414,12 @@ Now, register this class as a Doctrine listener:
         use AppBundle\EventListener\BrochureUploaderListener;
 
         $container->autowire(BrochureUploaderListener::class)
-            ->addTag('doctrine.event_listener', array(
+            ->addTag('doctrine.event_listener', [
                 'event' => 'prePersist',
-            ))
-            ->addTag('doctrine.event_listener', array(
+            ])
+            ->addTag('doctrine.event_listener', [
                 'event' => 'preUpdate',
-            ))
+            ])
         ;
 
 This listener is now automatically executed when persisting a new Product
diff --git a/create_framework/dependency_injection.rst b/create_framework/dependency_injection.rst
index a1609ec3838..ed8b804718d 100644
--- a/create_framework/dependency_injection.rst
+++ b/create_framework/dependency_injection.rst
@@ -108,33 +108,33 @@ Create a new file to host the dependency injection container configuration::
     $containerBuilder = new DependencyInjection\ContainerBuilder();
     $containerBuilder->register('context', Routing\RequestContext::class);
     $containerBuilder->register('matcher', Routing\Matcher\UrlMatcher::class)
-        ->setArguments(array($routes, new Reference('context')))
+        ->setArguments([$routes, new Reference('context')])
     ;
     $containerBuilder->register('request_stack', HttpFoundation\RequestStack::class);
     $containerBuilder->register('controller_resolver', HttpKernel\Controller\ControllerResolver::class);
     $containerBuilder->register('argument_resolver', HttpKernel\Controller\ArgumentResolver::class);
 
     $containerBuilder->register('listener.router', HttpKernel\EventListener\RouterListener::class)
-        ->setArguments(array(new Reference('matcher'), new Reference('request_stack')))
+        ->setArguments([new Reference('matcher'), new Reference('request_stack')])
     ;
     $containerBuilder->register('listener.response', HttpKernel\EventListener\ResponseListener::class)
-        ->setArguments(array('UTF-8'))
+        ->setArguments(['UTF-8'])
     ;
     $containerBuilder->register('listener.exception', HttpKernel\EventListener\ExceptionListener::class)
-        ->setArguments(array('Calendar\Controller\ErrorController::exceptionAction'))
+        ->setArguments(['Calendar\Controller\ErrorController::exceptionAction'])
     ;
     $containerBuilder->register('dispatcher', EventDispatcher\EventDispatcher::class)
-        ->addMethodCall('addSubscriber', array(new Reference('listener.router')))
-        ->addMethodCall('addSubscriber', array(new Reference('listener.response')))
-        ->addMethodCall('addSubscriber', array(new Reference('listener.exception')))
+        ->addMethodCall('addSubscriber', [new Reference('listener.router')])
+        ->addMethodCall('addSubscriber', [new Reference('listener.response')])
+        ->addMethodCall('addSubscriber', [new Reference('listener.exception')])
     ;
     $containerBuilder->register('framework', Framework::class)
-        ->setArguments(array(
+        ->setArguments([
             new Reference('dispatcher'),
             new Reference('controller_resolver'),
             new Reference('request_stack'),
             new Reference('argument_resolver'),
-        ))
+        ])
     ;
 
     return $containerBuilder;
@@ -198,7 +198,7 @@ Now, here is how you can register a custom listener in the front controller::
 
     $container->register('listener.string_response', StringResponseListener::class);
     $container->getDefinition('dispatcher')
-        ->addMethodCall('addSubscriber', array(new Reference('listener.string_response')))
+        ->addMethodCall('addSubscriber', [new Reference('listener.string_response')])
     ;
 
 Beside describing your objects, the dependency injection container can also be
@@ -214,7 +214,7 @@ charset configurable::
 
     // ...
     $container->register('listener.response', HttpKernel\EventListener\ResponseListener::class)
-        ->setArguments(array('%charset%'))
+        ->setArguments(['%charset%'])
     ;
 
 After this change, you must set the charset before using the response listener
@@ -227,7 +227,7 @@ Instead of relying on the convention that the routes are defined by the
 
     // ...
     $container->register('matcher', Routing\Matcher\UrlMatcher::class)
-        ->setArguments(array('%routes%', new Reference('context')))
+        ->setArguments(['%routes%', new Reference('context')])
     ;
 
 And the related change in the front controller::
diff --git a/create_framework/event_dispatcher.rst b/create_framework/event_dispatcher.rst
index 8939659bd4f..7c515da2b15 100644
--- a/create_framework/event_dispatcher.rst
+++ b/create_framework/event_dispatcher.rst
@@ -240,8 +240,8 @@ And do the same with the other listener::
 Our front controller should now look like the following::
 
     $dispatcher = new EventDispatcher();
-    $dispatcher->addListener('response', array(new Simplex\ContentLengthListener(), 'onResponse'), -255);
-    $dispatcher->addListener('response', array(new Simplex\GoogleListener(), 'onResponse'));
+    $dispatcher->addListener('response', [new Simplex\ContentLengthListener(), 'onResponse'], -255);
+    $dispatcher->addListener('response', [new Simplex\GoogleListener(), 'onResponse']);
 
 Even if the code is now nicely wrapped in classes, there is still a slight
 issue: the knowledge of the priorities is "hardcoded" in the front controller,
@@ -270,7 +270,7 @@ look at the new version of the ``GoogleListener``::
 
         public static function getSubscribedEvents()
         {
-            return array('response' => 'onResponse');
+            return ['response' => 'onResponse'];
         }
     }
 
@@ -287,7 +287,7 @@ And here is the new version of ``ContentLengthListener``::
 
         public static function getSubscribedEvents()
         {
-            return array('response' => array('onResponse', -255));
+            return ['response' => ['onResponse', -255]];
         }
     }
 
diff --git a/create_framework/front_controller.rst b/create_framework/front_controller.rst
index b2acfc06ade..2f271e5b704 100644
--- a/create_framework/front_controller.rst
+++ b/create_framework/front_controller.rst
@@ -80,10 +80,10 @@ Such a script might look like the following::
     $request = Request::createFromGlobals();
     $response = new Response();
 
-    $map = array(
+    $map = [
         '/hello' => __DIR__.'/hello.php',
         '/bye'   => __DIR__.'/bye.php',
-    );
+    ];
 
     $path = $request->getPathInfo();
     if (isset($map[$path])) {
@@ -203,10 +203,10 @@ We have the first version of our framework::
     $request = Request::createFromGlobals();
     $response = new Response();
 
-    $map = array(
+    $map = [
         '/hello' => __DIR__.'/../src/pages/hello.php',
         '/bye'   => __DIR__.'/../src/pages/bye.php',
-    );
+    ];
 
     $path = $request->getPathInfo();
     if (isset($map[$path])) {
diff --git a/create_framework/http_foundation.rst b/create_framework/http_foundation.rst
index d54990def79..52d6950c0c3 100644
--- a/create_framework/http_foundation.rst
+++ b/create_framework/http_foundation.rst
@@ -256,7 +256,7 @@ code in production without a proxy, it becomes trivially easy to abuse your
 system. That's not the case with the ``getClientIp()`` method as you must
 explicitly trust your reverse proxies by calling ``setTrustedProxies()``::
 
-    Request::setTrustedProxies(array('10.0.0.1'));
+    Request::setTrustedProxies(['10.0.0.1']);
 
     if ($myIp === $request->getClientIp()) {
         // the client is a known one, so give it some more privilege
diff --git a/create_framework/http_kernel_controller_resolver.rst b/create_framework/http_kernel_controller_resolver.rst
index b1b8bdaee17..48a331ed36d 100644
--- a/create_framework/http_kernel_controller_resolver.rst
+++ b/create_framework/http_kernel_controller_resolver.rst
@@ -22,10 +22,10 @@ class::
 
 Update the route definition accordingly::
 
-    $routes->add('leap_year', new Routing\Route('/is_leap_year/{year}', array(
+    $routes->add('leap_year', new Routing\Route('/is_leap_year/{year}', [
         'year' => null,
-        '_controller' => array(new LeapYearController(), 'indexAction'),
-    )));
+        '_controller' => [new LeapYearController(), 'indexAction'],
+    ]));
 
 The move is pretty straightforward and makes a lot of sense as soon as you
 create more pages but you might have noticed a non-desirable side-effect...
@@ -72,10 +72,10 @@ controller associated with the Request. Besides the built-in PHP callbacks,
 ``getController()`` also supports strings composed of a class name followed by
 two colons and a method name as a valid callback, like 'class::method'::
 
-    $routes->add('leap_year', new Routing\Route('/is_leap_year/{year}', array(
+    $routes->add('leap_year', new Routing\Route('/is_leap_year/{year}', [
         'year' => null,
         '_controller' => 'LeapYearController::indexAction',
-    )));
+    ]));
 
 To make this code work, modify the framework code to use the controller
 resolver from HttpKernel::
diff --git a/create_framework/http_kernel_httpkernel_class.rst b/create_framework/http_kernel_httpkernel_class.rst
index 94191eeb102..07e7820c3df 100644
--- a/create_framework/http_kernel_httpkernel_class.rst
+++ b/create_framework/http_kernel_httpkernel_class.rst
@@ -170,7 +170,7 @@ only if needed::
 
         public static function getSubscribedEvents()
         {
-            return array('kernel.view' => 'onView');
+            return ['kernel.view' => 'onView'];
         }
     }
 
diff --git a/create_framework/http_kernel_httpkernelinterface.rst b/create_framework/http_kernel_httpkernelinterface.rst
index 13f98119eb2..2d7c2ed053f 100644
--- a/create_framework/http_kernel_httpkernelinterface.rst
+++ b/create_framework/http_kernel_httpkernelinterface.rst
@@ -119,13 +119,13 @@ abstracts the most frequently used caching strategies into one simple array::
 
     $date = date_create_from_format('Y-m-d H:i:s', '2005-10-15 10:00:00');
 
-    $response->setCache(array(
+    $response->setCache([
         'public'        => true,
         'etag'          => 'abcde',
         'last_modified' => $date,
         'max_age'       => 10,
         's_maxage'      => 10,
-    ));
+    ]);
 
     // it is equivalent to the following code
     $response->setPublic();
@@ -186,7 +186,7 @@ ease debugging, you can enable the debug mode::
         $framework,
         new HttpKernel\HttpCache\Store(__DIR__.'/../cache'),
         new HttpKernel\HttpCache\Esi(),
-        array('debug' => true)
+        ['debug' => true]
     );
 
 The debug mode adds a ``X-Symfony-Cache`` header to each response that
diff --git a/create_framework/routing.rst b/create_framework/routing.rst
index cafe4beb7ce..ef3307ccd99 100644
--- a/create_framework/routing.rst
+++ b/create_framework/routing.rst
@@ -12,10 +12,10 @@ framework just a little to make templates even more readable::
 
     $request = Request::createFromGlobals();
 
-    $map = array(
+    $map = [
         '/hello' => 'hello',
         '/bye'   => 'bye',
-    );
+    ];
 
     $path = $request->getPathInfo();
     if (isset($map[$path])) {
@@ -61,12 +61,12 @@ one for the simple ``/bye`` one::
 
     use Symfony\Component\Routing\Route;
 
-    $routes->add('hello', new Route('/hello/{name}', array('name' => 'World')));
+    $routes->add('hello', new Route('/hello/{name}', ['name' => 'World']));
     $routes->add('bye', new Route('/bye'));
 
 Each entry in the collection is defined by a name (``hello``) and a ``Route``
 instance, which is defined by a route pattern (``/hello/{name}``) and an array
-of default values for route attributes (``array('name' => 'World')``).
+of default values for route attributes (``['name' => 'World']``).
 
 .. note::
 
@@ -174,7 +174,7 @@ There are a few new things in the code:
       use Symfony\Component\Routing;
 
       $routes = new Routing\RouteCollection();
-      $routes->add('hello', new Routing\Route('/hello/{name}', array('name' => 'World')));
+      $routes->add('hello', new Routing\Route('/hello/{name}', ['name' => 'World']));
       $routes->add('bye', new Routing\Route('/bye'));
 
       return $routes;
@@ -195,7 +195,7 @@ impact. Want to know how to use the generator? Insanely easy::
 
     $generator = new Routing\Generator\UrlGenerator($routes, $context);
 
-    echo $generator->generate('hello', array('name' => 'Fabien'));
+    echo $generator->generate('hello', ['name' => 'Fabien']);
     // outputs /hello/Fabien
 
 The code should be self-explanatory; and thanks to the context, you can even
@@ -205,7 +205,7 @@ generate absolute URLs::
 
     echo $generator->generate(
         'hello',
-        array('name' => 'Fabien'),
+        ['name' => 'Fabien'],
         UrlGeneratorInterface::ABSOLUTE_URL
     );
     // outputs something like http://example.com/somewhere/hello/Fabien
diff --git a/create_framework/separation_of_concerns.rst b/create_framework/separation_of_concerns.rst
index 84db81611e0..9ed5a65f258 100644
--- a/create_framework/separation_of_concerns.rst
+++ b/create_framework/separation_of_concerns.rst
@@ -136,10 +136,10 @@ And move the ``is_leap_year()`` function to its own class too::
 
 Don't forget to update the ``example.com/src/app.php`` file accordingly::
 
-    $routes->add('leap_year', new Routing\Route('/is_leap_year/{year}', array(
+    $routes->add('leap_year', new Routing\Route('/is_leap_year/{year}', [
         'year' => null,
         '_controller' => 'Calendar\Controller\LeapYearController::indexAction',
-    )));
+    ]));
 
 To sum up, here is the new file layout:
 
diff --git a/create_framework/templating.rst b/create_framework/templating.rst
index a00f5b352fb..8b2801c8e5a 100644
--- a/create_framework/templating.rst
+++ b/create_framework/templating.rst
@@ -55,10 +55,10 @@ controller... your choice.
 As a convention, for each route, the associated controller is configured via
 the ``_controller`` route attribute::
 
-    $routes->add('hello', new Routing\Route('/hello/{name}', array(
+    $routes->add('hello', new Routing\Route('/hello/{name}', [
         'name' => 'World',
         '_controller' => 'render_template',
-    )));
+    ]));
 
     try {
         $request->attributes->add($matcher->match($request->getPathInfo()));
@@ -72,17 +72,17 @@ the ``_controller`` route attribute::
 A route can now be associated with any controller and of course, within a
 controller, you can still use the ``render_template()`` to render a template::
 
-    $routes->add('hello', new Routing\Route('/hello/{name}', array(
+    $routes->add('hello', new Routing\Route('/hello/{name}', [
         'name' => 'World',
         '_controller' => function ($request) {
             return render_template($request);
         }
-    )));
+    ]));
 
 This is rather flexible as you can change the Response object afterwards and
 you can even pass additional arguments to the template::
 
-    $routes->add('hello', new Routing\Route('/hello/{name}', array(
+    $routes->add('hello', new Routing\Route('/hello/{name}', [
         'name' => 'World',
         '_controller' => function ($request) {
             // $foo will be available in the template
@@ -95,7 +95,7 @@ you can even pass additional arguments to the template::
 
             return $response;
         }
-    )));
+    ]));
 
 Here is the updated and improved version of our framework::
 
@@ -154,7 +154,7 @@ framework does not need to be modified in any way, just create a new
     }
 
     $routes = new Routing\RouteCollection();
-    $routes->add('leap_year', new Routing\Route('/is_leap_year/{year}', array(
+    $routes->add('leap_year', new Routing\Route('/is_leap_year/{year}', [
         'year' => null,
         '_controller' => function ($request) {
             if (is_leap_year($request->attributes->get('year'))) {
@@ -163,7 +163,7 @@ framework does not need to be modified in any way, just create a new
 
             return new Response('Nope, this is not a leap year.');
         }
-    )));
+    ]));
 
     return $routes;
 
diff --git a/create_framework/unit_testing.rst b/create_framework/unit_testing.rst
index d3bb5f623a4..17cf79393be 100644
--- a/create_framework/unit_testing.rst
+++ b/create_framework/unit_testing.rst
@@ -164,13 +164,13 @@ Response::
         $matcher
             ->expects($this->once())
             ->method('match')
-            ->will($this->returnValue(array(
+            ->will($this->returnValue([
                 '_route' => 'foo',
                 'name' => 'Fabien',
                 '_controller' => function ($name) {
                     return new Response('Hello '.$name);
                 }
-            )))
+            ]))
         ;
         $matcher
             ->expects($this->once())
diff --git a/deployment/fortrabbit.rst b/deployment/fortrabbit.rst
index ffe968e813d..2c4b4edfc97 100644
--- a/deployment/fortrabbit.rst
+++ b/deployment/fortrabbit.rst
@@ -61,14 +61,14 @@ to redirect it to :phpfunction:`error_log`:
     .. code-block:: php
 
         // app/config/config_prod.php
-        $container->loadFromExtension('monolog', array(
+        $container->loadFromExtension('monolog', [
             // ...
-            'handlers' => array(
-                'nested' => array(
+            'handlers' => [
+                'nested' => [
                     'type' => 'error_log',
-                ),
-            ),
-        ));
+                ],
+            ],
+        ]);
 
 Configuring Database Access & Session Handler
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
@@ -98,7 +98,7 @@ contents::
     // check if the Memcache component is present
     if (isset($secrets['MEMCACHE'])) {
         $memcache = $secrets['MEMCACHE'];
-        $handlers = array();
+        $handlers = [];
 
         foreach (range(1, $memcache['COUNT']) as $num) {
             $handlers[] = $memcache['HOST'.$num].':'.$memcache['PORT'.$num];
@@ -161,11 +161,11 @@ Make sure this file is imported into the main config file:
         $loader->import('config.php');
         $loader->import('config_prod_secrets.php');
 
-        $container->loadFromExtension('framework', array(
-            'session' => array(
+        $container->loadFromExtension('framework', [
+            'session' => [
                 'handler_id' => null,
-            ),
-        ));
+            ],
+        ]);
 
         // ...
 
diff --git a/deployment/proxies.rst b/deployment/proxies.rst
index 25a8026108c..9c4f7c4c9de 100644
--- a/deployment/proxies.rst
+++ b/deployment/proxies.rst
@@ -70,7 +70,7 @@ In this case, you'll need to - *very carefully* - trust *all* proxies.
        // ...
        Request::setTrustedProxies(
            // trust *all* requests
-           array('127.0.0.1', $request->server->get('REMOTE_ADDR')),
+           ['127.0.0.1', $request->server->get('REMOTE_ADDR')],
 
            // if you're using ELB, otherwise use a constant from above
            Request::HEADER_X_FORWARDED_AWS_ELB
diff --git a/doctrine.rst b/doctrine.rst
index d5081462cac..aa029025461 100644
--- a/doctrine.rst
+++ b/doctrine.rst
@@ -100,15 +100,15 @@ information. By convention, this information is usually configured in an
         .. code-block:: php
 
             // app/config/config.php
-            $container->loadFromExtension('doctrine', array(
-                'dbal' => array(
+            $container->loadFromExtension('doctrine', [
+                'dbal' => [
                     'driver'   => 'pdo_mysql',
                     'host'     => '%database_host%',
                     'dbname'   => '%database_name%',
                     'user'     => '%database_user%',
                     'password' => '%database_password%',
-                ),
-            ));
+                ],
+            ]);
 
     By separating the database information into a separate file, you can
     easily keep different versions of the file on each server. You can also
@@ -185,15 +185,15 @@ can automatically generate an empty ``test_project`` database for you:
         .. code-block:: php
 
             // app/config/config.php
-            $configuration->loadFromExtension('doctrine', array(
-                'dbal' => array(
+            $configuration->loadFromExtension('doctrine', [
+                'dbal' => [
                     'charset' => 'utf8mb4',
-                    'default_table_options' => array(
+                    'default_table_options' => [
                         'charset' => 'utf8mb4',
                         'collate' => 'utf8mb4_unicode_ci',
-                    )
-                ),
-            ));
+                    ]
+                ],
+            ]);
 
     We recommend against MySQL's ``utf8`` character set, since it does not
     support 4-byte unicode characters, and strings containing them will be
@@ -248,13 +248,13 @@ can automatically generate an empty ``test_project`` database for you:
         .. code-block:: php
 
             // app/config/config.php
-            $container->loadFromExtension('doctrine', array(
-                'dbal' => array(
+            $container->loadFromExtension('doctrine', [
+                'dbal' => [
                     'driver'  => 'pdo_sqlite',
                     'path'    => '%kernel.project_dir%/app/sqlite.db',
                     'charset' => 'UTF-8',
-                ),
-            ));
+                ],
+            ]);
 
 Creating an Entity Class
 ~~~~~~~~~~~~~~~~~~~~~~~~
@@ -664,14 +664,15 @@ to easily fetch objects based on multiple conditions::
     $repository = $this->getDoctrine()->getRepository(Product::class);
 
     // looks for a single product matching the given name and price
-    $product = $repository->findOneBy(
-        array('name' => 'Keyboard', 'price' => 19.99)
-    );
+    $product = $repository->findOneBy([
+        'name' => 'Keyboard',
+        'price' => 19.99
+    ]);
 
     // looks for multiple products matching the given name, ordered by price
     $products = $repository->findBy(
-        array('name' => 'Keyboard'),
-        array('price' => 'ASC')
+        ['name' => 'Keyboard'],
+        ['price' => 'ASC']
     );
 
 .. tip::
diff --git a/doctrine/custom_dql_functions.rst b/doctrine/custom_dql_functions.rst
index bc9687c065a..cfdee97f160 100644
--- a/doctrine/custom_dql_functions.rst
+++ b/doctrine/custom_dql_functions.rst
@@ -58,23 +58,23 @@ In Symfony, you can register your custom DQL functions as follows:
         use AppBundle\DQL\NumericFunction;
         use AppBundle\DQL\DatetimeFunction;
 
-        $container->loadFromExtension('doctrine', array(
-            'orm' => array(
+        $container->loadFromExtension('doctrine', [
+            'orm' => [
                 // ...
-                'dql' => array(
-                    'string_functions' => array(
+                'dql' => [
+                    'string_functions' => [
                         'test_string'   => StringFunction::class,
                         'second_string' => SecondStringFunction::class,
-                    ),
-                    'numeric_functions' => array(
+                    ],
+                    'numeric_functions' => [
                         'test_numeric' => NumericFunction::class,
-                    ),
-                    'datetime_functions' => array(
+                    ],
+                    'datetime_functions' => [
                         'test_datetime' => DatetimeFunction::class,
-                    ),
-                ),
-            ),
-        ));
+                    ],
+                ],
+            ],
+        ]);
 
 .. note::
 
@@ -130,22 +130,22 @@ In Symfony, you can register your custom DQL functions as follows:
             // app/config/config.php
             use AppBundle\DQL\DatetimeFunction;
 
-            $container->loadFromExtension('doctrine', array(
-                'doctrine' => array(
-                    'orm' => array(
+            $container->loadFromExtension('doctrine', [
+                'doctrine' => [
+                    'orm' => [
                         // ...
-                        'entity_managers' => array(
-                            'example_manager' => array(
+                        'entity_managers' => [
+                            'example_manager' => [
                                 // place your functions here
-                                'dql' => array(
-                                    'datetime_functions' => array(
+                                'dql' => [
+                                    'datetime_functions' => [
                                         'test_datetime' => DatetimeFunction::class,
-                                    ),
-                                ),
-                            ),
-                        ),
-                    ),
-                ),
-            ));
+                                    ],
+                                ],
+                            ],
+                        ],
+                    ],
+                ],
+            ]);
 
 .. _`DQL User Defined Functions`: http://docs.doctrine-project.org/projects/doctrine-orm/en/latest/cookbook/dql-user-defined-functions.html
diff --git a/doctrine/dbal.rst b/doctrine/dbal.rst
index cb27a1b8a70..abd13cd22f2 100644
--- a/doctrine/dbal.rst
+++ b/doctrine/dbal.rst
@@ -66,16 +66,16 @@ To get started, configure the database connection parameters:
     .. code-block:: php
 
         // app/config/config.php
-        $container->loadFromExtension('doctrine', array(
-            'dbal' => array(
+        $container->loadFromExtension('doctrine', [
+            'dbal' => [
                 'driver'    => 'pdo_mysql',
                 'dbname'    => 'Symfony',
                 'user'      => 'root',
                 'password'  => null,
                 'charset'   => 'UTF8',
                 'server_version' => '5.6',
-            ),
-        ));
+            ],
+        ]);
 
 For full DBAL configuration options, or to learn how to configure multiple
 connections, see :ref:`reference-dbal-configuration`.
@@ -138,14 +138,14 @@ mapping types, read Doctrine's `Custom Mapping Types`_ section of their document
         use AppBundle\Type\CustomFirst;
         use AppBundle\Type\CustomSecond;
 
-        $container->loadFromExtension('doctrine', array(
-            'dbal' => array(
-                'types' => array(
+        $container->loadFromExtension('doctrine', [
+            'dbal' => [
+                'types' => [
                     'custom_first'  => CustomFirst::class,
                     'custom_second' => CustomSecond::class,
-                ),
-            ),
-        ));
+                ],
+            ],
+        ]);
 
 Registering custom Mapping Types in the SchemaTool
 --------------------------------------------------
@@ -188,13 +188,13 @@ mapping type:
     .. code-block:: php
 
         // app/config/config.php
-        $container->loadFromExtension('doctrine', array(
-            'dbal' => array(
-               'mapping_types' => array(
+        $container->loadFromExtension('doctrine', [
+            'dbal' => [
+               'mapping_types' => [
                   'enum'  => 'string',
-               ),
-            ),
-        ));
+               ],
+            ],
+        ]);
 
 .. _`PDO`:           https://php.net/pdo
 .. _`Doctrine`:      http://www.doctrine-project.org
diff --git a/doctrine/event_listeners_subscribers.rst b/doctrine/event_listeners_subscribers.rst
index 1faa304180c..605af48a87b 100644
--- a/doctrine/event_listeners_subscribers.rst
+++ b/doctrine/event_listeners_subscribers.rst
@@ -73,16 +73,16 @@ managers that use this connection.
         use AppBundle\EventListener\SearchIndexerSubscriber;
 
         $container->autowire(SearchIndexer::class)
-            ->addTag('doctrine.event_listener', array('event' => 'postPersist'))
+            ->addTag('doctrine.event_listener', ['event' => 'postPersist'])
         ;
         $container->autowire(SearchIndexer2::class)
-            ->addTag('doctrine.event_listener', array(
+            ->addTag('doctrine.event_listener', [
                 'event' => 'postPersist',
                 'connection' => 'default',
-            ))
+            ])
         ;
         $container->autowire(SearchIndexerSubscriber::class)
-            ->addTag('doctrine.event_subscriber', array('connection' => 'default'))
+            ->addTag('doctrine.event_subscriber', ['connection' => 'default'])
         ;
 
 Creating the Listener Class
@@ -150,10 +150,10 @@ interface and have an event method for each event it subscribes to::
     {
         public function getSubscribedEvents()
         {
-            return array(
+            return [
                 Events::postPersist,
                 Events::postUpdate,
-            );
+            ];
         }
 
         public function postUpdate(LifecycleEventArgs $args)
@@ -233,7 +233,7 @@ to the tag like so:
 
         $container
             ->register('my.listener', SearchIndexer::class)
-            ->addTag('doctrine.event_listener', array('event' => 'postPersist', 'lazy' => 'true'))
+            ->addTag('doctrine.event_listener', ['event' => 'postPersist', 'lazy' => 'true'])
         ;
 
 .. note::
@@ -290,10 +290,10 @@ numbers mean that listeners are invoked earlier.
 
         $container
             ->register('my.listener.with_high_priority', MyHighPriorityListener::class)
-            ->addTag('doctrine.event_listener', array('event' => 'postPersist', 'priority' => 10))
+            ->addTag('doctrine.event_listener', ['event' => 'postPersist', 'priority' => 10])
         ;
 
         $container
             ->register('my.listener.with_low_priority', MyLowPriorityListener::class)
-            ->addTag('doctrine.event_listener', array('event' => 'postPersist', 'priority' => 1))
+            ->addTag('doctrine.event_listener', ['event' => 'postPersist', 'priority' => 1])
         ;
diff --git a/doctrine/mapping_model_classes.rst b/doctrine/mapping_model_classes.rst
index 340a3005cd0..d3f2f6f46dd 100644
--- a/doctrine/mapping_model_classes.rst
+++ b/doctrine/mapping_model_classes.rst
@@ -34,17 +34,17 @@ be adapted for your case::
             // ...
 
             $modelDirectory = realpath(__DIR__.'/Resources/config/doctrine/model');
-            $mappings = array(
+            $mappings = [
                 $modelDirectory => Model::class,
-            );
+            ];
 
             if (class_exists(DoctrineOrmMappingsPass::class)) {
                 $container->addCompilerPass(
                     DoctrineOrmMappingsPass::createXmlMappingDriver(
                         $mappings,
-                        array('cmf_routing.model_manager_name'),
+                        ['cmf_routing.model_manager_name'],
                         'cmf_routing.backend_type_orm',
-                        array('CmfRoutingBundle' => Model::class)
+                        ['CmfRoutingBundle' => Model::class]
                 ));
             }
 
@@ -52,9 +52,9 @@ be adapted for your case::
                 $container->addCompilerPass(
                     DoctrineMongoDBMappingsPass::createXmlMappingDriver(
                         $mappings,
-                        array('cmf_routing.model_manager_name'),
+                        ['cmf_routing.model_manager_name'],
                         'cmf_routing.backend_type_mongodb',
-                        array('CmfRoutingBundle' => Model::class)
+                        ['CmfRoutingBundle' => Model::class]
                 ));
             }
 
@@ -62,9 +62,9 @@ be adapted for your case::
                 $container->addCompilerPass(
                     DoctrineCouchDBMappingsPass::createXmlMappingDriver(
                         $mappings,
-                        array('cmf_routing.model_manager_name'),
+                        ['cmf_routing.model_manager_name'],
                         'cmf_routing.backend_type_couchdb',
-                        array('CmfRoutingBundle' => Model::class)
+                        ['CmfRoutingBundle' => Model::class]
                 ));
             }
 
@@ -72,9 +72,9 @@ be adapted for your case::
                 $container->addCompilerPass(
                     DoctrinePhpcrMappingsPass::createXmlMappingDriver(
                         $mappings,
-                        array('cmf_routing.model_manager_name'),
+                        ['cmf_routing.model_manager_name'],
                         'cmf_routing.backend_type_phpcr',
-                        array('CmfRoutingBundle' => Model::class)
+                        ['CmfRoutingBundle' => Model::class]
                 ));
             }
         }
@@ -122,16 +122,16 @@ Annotations, XML, Yaml, PHP and StaticPHP. The arguments are:
         // ...
         private function buildMappingCompilerPass()
         {
-            $fileLocator = new Definition(DefaultFileLocator::class, array(
-                array(realpath(__DIR__ . '/Resources/config/doctrine-base')),
+            $fileLocator = new Definition(DefaultFileLocator::class, [
+                [realpath(__DIR__ . '/Resources/config/doctrine-base')],
                 '.orm.xml'
-            ));
-            $driver = new Definition(XmlDriver::class, array($fileLocator));
+            ]);
+            $driver = new Definition(XmlDriver::class, [$fileLocator]);
 
             return new DoctrineOrmMappingsPass(
                 $driver,
-                array(Model::class),
-                array('your_bundle.manager_name'),
+                [Model::class],
+                ['your_bundle.manager_name'],
                 'your_bundle.orm_enabled'
             );
         }
diff --git a/doctrine/mongodb_session_storage.rst b/doctrine/mongodb_session_storage.rst
index fcfecfe3dd2..28a2fd6bb4c 100644
--- a/doctrine/mongodb_session_storage.rst
+++ b/doctrine/mongodb_session_storage.rst
@@ -79,28 +79,28 @@ need to change/add some parameters in the main configuration file:
         use Symfony\Component\DependencyInjection\Reference;
         use Symfony\Component\HttpFoundation\Session\Storage\Handler\MongoDbSessionHandler;
 
-        $container->loadFromExtension('framework', array(
-            'session' => array(
+        $container->loadFromExtension('framework', [
+            'session' => [
                 // ...
                 'handler_id'      => 'session.handler.mongo',
                 'cookie_lifetime' => 2592000, // optional, it is set to 30 days here
                 'gc_maxlifetime'  => 2592000, // optional, it is set to 30 days here
-            ),
-        ));
+            ],
+        ]);
 
         $container->register('mongo_client', \MongoClient::class)
-            ->setArguments(array(
+            ->setArguments([
                 // if using a username and password
-                array('mongodb://%mongodb_username%:%mongodb_password%@%mongodb_host%:27017'),
+                ['mongodb://%mongodb_username%:%mongodb_password%@%mongodb_host%:27017'],
                 // if not using a username and password
-                array('mongodb://%mongodb_host%:27017'),
-            ));
+                ['mongodb://%mongodb_host%:27017'],
+            ]);
 
         $container->register('session.handler.mongo', MongoDbSessionHandler::class)
-            ->setArguments(array(
+            ->setArguments([
                 new Reference('mongo_client'),
                 '%mongo.session.options%',
-            ));
+            ]);
 
 The parameters used above should be defined somewhere in your application, often in your main
 parameters configuration:
@@ -148,10 +148,10 @@ parameters configuration:
 
         use Symfony\Component\DependencyInjection\Reference;
 
-        $container->setParameter('mongo.session.options', array(
+        $container->setParameter('mongo.session.options', [
             'database'   => 'session_db', // your MongoDB database name
             'collection' => 'session',  // your MongoDB collection name
-        ));
+        ]);
         $container->setParameter('mongodb_host', '1.2.3.4'); // your MongoDB server's IP
         $container->setParameter('mongodb_username', 'my_username');
         $container->setParameter('mongodb_password', 'my_password');
diff --git a/doctrine/multiple_entity_managers.rst b/doctrine/multiple_entity_managers.rst
index 8f43b493660..948ca8b9092 100644
--- a/doctrine/multiple_entity_managers.rst
+++ b/doctrine/multiple_entity_managers.rst
@@ -111,11 +111,11 @@ The following configuration code shows how you can configure two entity managers
 
     .. code-block:: php
 
-        $container->loadFromExtension('doctrine', array(
-            'dbal' => array(
+        $container->loadFromExtension('doctrine', [
+            'dbal' => [
                 'default_connection' => 'default',
-                'connections' => array(
-                    'default' => array(
+                'connections' => [
+                    'default' => [
                         'driver'   => 'pdo_mysql',
                         'host'     => '%database_host%',
                         'port'     => '%database_port%',
@@ -123,8 +123,8 @@ The following configuration code shows how you can configure two entity managers
                         'user'     => '%database_user%',
                         'password' => '%database_password%',
                         'charset'  => 'UTF8',
-                    ),
-                    'customer' => array(
+                    ],
+                    'customer' => [
                         'driver'   => 'pdo_mysql',
                         'host'     => '%database_host2%',
                         'port'     => '%database_port2%',
@@ -132,29 +132,29 @@ The following configuration code shows how you can configure two entity managers
                         'user'     => '%database_user2%',
                         'password' => '%database_password2%',
                         'charset'  => 'UTF8',
-                    ),
-                ),
-            ),
+                    ],
+                ],
+            ],
 
-            'orm' => array(
+            'orm' => [
                 'default_entity_manager' => 'default',
-                'entity_managers' => array(
-                    'default' => array(
+                'entity_managers' => [
+                    'default' => [
                         'connection' => 'default',
-                        'mappings'   => array(
+                        'mappings'   => [
                             'AppBundle'  => null,
                             'AcmeStoreBundle' => null,
-                        ),
-                    ),
-                    'customer' => array(
+                        ],
+                    ],
+                    'customer' => [
                         'connection' => 'customer',
-                        'mappings'   => array(
+                        'mappings'   => [
                             'AcmeCustomerBundle' => null,
-                        ),
-                    ),
-                ),
-            ),
-        ));
+                        ],
+                    ],
+                ],
+            ],
+        ]);
 
 In this case, you've defined two entity managers and called them ``default``
 and ``customer``. The ``default`` entity manager manages entities in the
diff --git a/doctrine/pdo_session_storage.rst b/doctrine/pdo_session_storage.rst
index ccc5a494a8d..f47a6fea080 100644
--- a/doctrine/pdo_session_storage.rst
+++ b/doctrine/pdo_session_storage.rst
@@ -55,10 +55,10 @@ To use it, first register a new handler service:
         use Symfony\Component\HttpFoundation\Session\Storage\Handler\PdoSessionHandler;
 
         $storageDefinition = $container->register(PdoSessionHandler::class)
-            ->setArguments(array(
+            ->setArguments([
                 'mysql:dbname=mydatabase; host=myhost; port=myport',
-                array('db_username' => 'myuser', 'db_password' => 'mypassword'),
-            ))
+                ['db_username' => 'myuser', 'db_password' => 'mypassword'],
+            ])
         ;
 
 .. tip::
@@ -93,13 +93,13 @@ Next, tell Symfony to use your service as the session handler:
         use Symfony\Component\HttpFoundation\Session\Storage\Handler\PdoSessionHandler;
 
         // ...
-        $container->loadFromExtension('framework', array(
+        $container->loadFromExtension('framework', [
             // ...
-            'session' => array(
+            'session' => [
                 // ...
                 'handler_id' => PdoSessionHandler::class,
-            ),
-        ));
+            ],
+        ]);
 
 Configuring the Table and Column Names
 --------------------------------------
@@ -151,10 +151,10 @@ a second array argument to ``PdoSessionHandler``:
         // ...
 
         $container->register(PdoSessionHandler::class)
-            ->setArguments(array(
+            ->setArguments([
                 'mysql:dbname=mydatabase; host=myhost; port=myport',
-                array('db_table' => 'sessions', 'db_username' => 'myuser', 'db_password' => 'mypassword')
-            ))
+                ['db_table' => 'sessions', 'db_username' => 'myuser', 'db_password' => 'mypassword']
+            ])
         ;
 
 These are parameters that you can configure:
@@ -221,10 +221,10 @@ of your project's data, you can use the connection settings from the
 
         // ...
         $container->register(PdoSessionHandler::class)
-            ->setArguments(array(
+            ->setArguments([
                 'mysql:host=%database_host%;port=%database_port%;dbname=%database_name%',
-                array('db_username' => '%database_user%', 'db_password' => '%database_password%')
-            ))
+                ['db_username' => '%database_user%', 'db_password' => '%database_password%']
+            ])
         ;
 
 .. _example-sql-statements:
diff --git a/doctrine/registration_form.rst b/doctrine/registration_form.rst
index 9a3d8a176f8..5f71882c629 100644
--- a/doctrine/registration_form.rst
+++ b/doctrine/registration_form.rst
@@ -95,7 +95,7 @@ With some validation added, your class may look something like this::
 
         public function __construct()
         {
-            $this->roles = array('ROLE_USER');
+            $this->roles = ['ROLE_USER'];
         }
 
         // other properties and methods
@@ -203,19 +203,19 @@ Next, create the form for the ``User`` entity::
             $builder
                 ->add('email', EmailType::class)
                 ->add('username', TextType::class)
-                ->add('plainPassword', RepeatedType::class, array(
+                ->add('plainPassword', RepeatedType::class, [
                     'type' => PasswordType::class,
-                    'first_options'  => array('label' => 'Password'),
-                    'second_options' => array('label' => 'Repeat Password'),
-                ))
+                    'first_options'  => ['label' => 'Password'],
+                    'second_options' => ['label' => 'Repeat Password'],
+                ])
             ;
         }
 
         public function configureOptions(OptionsResolver $resolver)
         {
-            $resolver->setDefaults(array(
+            $resolver->setDefaults([
                 'data_class' => User::class,
-            ));
+            ]);
         }
     }
 
@@ -276,7 +276,7 @@ into the database::
 
             return $this->render(
                 'registration/register.html.twig',
-                array('form' => $form->createView())
+                ['form' => $form->createView()]
             );
         }
     }
@@ -312,11 +312,11 @@ encoder in the security configuration:
         // app/config/security.php
         use AppBundle\Entity\User;
 
-        $container->loadFromExtension('security', array(
-            'encoders' => array(
+        $container->loadFromExtension('security', [
+            'encoders' => [
                 User::class => 'bcrypt',
-            ),
-        ));
+            ],
+        ]);
 
 In this case the recommended `bcrypt`_ algorithm is used. If needed, check out
 the :ref:`user password encoding <security-encoding-user-password>` article.
@@ -355,9 +355,9 @@ the :ref:`user password encoding <security-encoding-user-password>` article.
             use Symfony\Component\Routing\Route;
 
             $routes = new RouteCollection();
-            $routes->add('user_registration', new Route('/register', array(
+            $routes->add('user_registration', new Route('/register', [
                 '_controller' => 'AppBundle:Registration:register',
-            )));
+            ]));
 
             return $routes;
 
@@ -442,10 +442,10 @@ To do this, add a ``termsAccepted`` field to your form, but set its
             $builder
                 ->add('email', EmailType::class);
                 // ...
-                ->add('termsAccepted', CheckboxType::class, array(
+                ->add('termsAccepted', CheckboxType::class, [
                     'mapped' => false,
                     'constraints' => new IsTrue(),
-                ))
+                ])
             );
         }
     }
diff --git a/doctrine/resolve_target_entity.rst b/doctrine/resolve_target_entity.rst
index 9c5901b354d..9dfa88387a8 100644
--- a/doctrine/resolve_target_entity.rst
+++ b/doctrine/resolve_target_entity.rst
@@ -146,14 +146,14 @@ about the replacement:
         use Acme\InvoiceBundle\Model\InvoiceSubjectInterface;
         use AppBundle\Entity\Customer;
 
-        $container->loadFromExtension('doctrine', array(
-            'orm' => array(
+        $container->loadFromExtension('doctrine', [
+            'orm' => [
                 // ...
-                'resolve_target_entities' => array(
+                'resolve_target_entities' => [
                     InvoiceSubjectInterface::class => Customer::class,
-                ),
-            ),
-        ));
+                ],
+            ],
+        ]);
 
 Final Thoughts
 --------------
diff --git a/email.rst b/email.rst
index 1ed48f76fd7..ed26b35fec6 100644
--- a/email.rst
+++ b/email.rst
@@ -60,12 +60,12 @@ already included:
     .. code-block:: php
 
         // app/config/config.php
-        $container->loadFromExtension('swiftmailer', array(
+        $container->loadFromExtension('swiftmailer', [
             'transport'  => "%mailer_transport%",
             'host'       => "%mailer_host%",
             'username'   => "%mailer_user%",
             'password'   => "%mailer_password%",
-        ));
+        ]);
 
 These values (e.g. ``%mailer_transport%``), are reading from the parameters
 that are set in the :ref:`parameters.yml <config-parameters.yml>` file. You
@@ -110,7 +110,7 @@ an email is pretty straightforward::
                 $this->renderView(
                     // app/Resources/views/Emails/registration.html.twig
                     'Emails/registration.html.twig',
-                    array('name' => $name)
+                    ['name' => $name]
                 ),
                 'text/html'
             )
@@ -119,7 +119,7 @@ an email is pretty straightforward::
             ->addPart(
                 $this->renderView(
                     'Emails/registration.txt.twig',
-                    array('name' => $name)
+                    ['name' => $name]
                 ),
                 'text/plain'
             )
diff --git a/email/cloud.rst b/email/cloud.rst
index d7ddbd33f3b..07a998b7a8f 100644
--- a/email/cloud.rst
+++ b/email/cloud.rst
@@ -65,14 +65,14 @@ and complete the configuration with the provided ``username`` and ``password``:
     .. code-block:: php
 
         // app/config/config.php
-        $container->loadFromExtension('swiftmailer', array(
+        $container->loadFromExtension('swiftmailer', [
             'transport'  => 'smtp',
             'host'       => 'email-smtp.us-east-1.amazonaws.com',
             'port'       => 587,
             'encryption' => 'tls',
             'username'   => 'AWS_SES_SMTP_USERNAME',
             'password'   => 'AWS_SES_SMTP_PASSWORD',
-        ));
+        ]);
 
 The ``port`` and ``encryption`` keys are not present in the Symfony Standard
 Edition configuration by default, but you can simply add them as needed.
diff --git a/email/dev_environment.rst b/email/dev_environment.rst
index 81c23901a73..127e22867aa 100644
--- a/email/dev_environment.rst
+++ b/email/dev_environment.rst
@@ -47,9 +47,9 @@ will not be sent when you run tests, but will continue to be sent in the
     .. code-block:: php
 
         // app/config/config_test.php
-        $container->loadFromExtension('swiftmailer', array(
+        $container->loadFromExtension('swiftmailer', [
             'disable_delivery' => "true",
-        ));
+        ]);
 
 If you'd also like to disable deliver in the ``dev`` environment, simply
 add this same configuration to the ``config_dev.yml`` file.
@@ -91,9 +91,9 @@ via the ``delivery_addresses`` option:
     .. code-block:: php
 
         // app/config/config_dev.php
-        $container->loadFromExtension('swiftmailer', array(
-            'delivery_addresses' => array("dev@example.com"),
-        ));
+        $container->loadFromExtension('swiftmailer', [
+            'delivery_addresses' => ["dev@example.com"],
+        ]);
 
 Now, suppose you're sending an email to ``recipient@example.com``::
 
@@ -105,7 +105,7 @@ Now, suppose you're sending an email to ``recipient@example.com``::
             ->setBody(
                 $this->renderView(
                     'HelloBundle:Hello:email.txt.twig',
-                    array('name' => $name)
+                    ['name' => $name]
                 )
             )
         ;
@@ -174,15 +174,15 @@ by adding the ``delivery_whitelist`` option:
     .. code-block:: php
 
         // app/config/config_dev.php
-        $container->loadFromExtension('swiftmailer', array(
-            'delivery_addresses' => array("dev@example.com"),
-            'delivery_whitelist' => array(
+        $container->loadFromExtension('swiftmailer', [
+            'delivery_addresses' => ["dev@example.com"],
+            'delivery_whitelist' => [
                 // all email addresses matching these regexes will be delivered
                 // like normal, as well as being sent to dev@example.com
                 '/@specialdomain\.com$/',
                 '/^admin@mydomain\.com$/',
-            ),
-        ));
+            ],
+        ]);
 
 In the above example all email messages will be redirected to ``dev@example.com``
 and messages sent to the ``admin@mydomain.com`` address or to any email address
@@ -236,9 +236,9 @@ you to open the report with details of the sent emails.
     .. code-block:: php
 
         // app/config/config_dev.php
-        $container->loadFromExtension('web_profiler', array(
+        $container->loadFromExtension('web_profiler', [
             'intercept_redirects' => 'true',
-        ));
+        ]);
 
 .. tip::
 
diff --git a/email/gmail.rst b/email/gmail.rst
index e34604bae0a..c8b3362753b 100644
--- a/email/gmail.rst
+++ b/email/gmail.rst
@@ -44,11 +44,11 @@ In the development configuration file, change the ``transport`` setting to
     .. code-block:: php
 
         // app/config/config_dev.php
-        $container->loadFromExtension('swiftmailer', array(
+        $container->loadFromExtension('swiftmailer', [
             'transport' => 'gmail',
             'username'  => 'your_gmail_username',
             'password'  => 'your_gmail_password',
-        ));
+        ]);
 
 .. tip::
 
@@ -96,11 +96,11 @@ In the development configuration file, change the ``transport`` setting to
         .. code-block:: php
 
             // app/config/config_dev.php
-            $container->loadFromExtension('swiftmailer', array(
+            $container->loadFromExtension('swiftmailer', [
                 'transport' => 'gmail',
                 'username'  => '%mailer_user%',
                 'password'  => '%mailer_password%',
-            ));
+            ]);
 
 Redefining the Default Configuration Parameters
 -----------------------------------------------
diff --git a/email/spool.rst b/email/spool.rst
index b4115c86767..006cea056a3 100644
--- a/email/spool.rst
+++ b/email/spool.rst
@@ -50,10 +50,10 @@ swiftmailer with the memory option, use the following configuration:
     .. code-block:: php
 
         // app/config/config.php
-        $container->loadFromExtension('swiftmailer', array(
+        $container->loadFromExtension('swiftmailer', [
              // ...
-            'spool' => array('type' => 'memory'),
-        ));
+            'spool' => ['type' => 'memory'],
+        ]);
 
 .. _spool-using-a-file:
 
@@ -100,14 +100,14 @@ In order to use the spool with files, use the following configuration:
     .. code-block:: php
 
         // app/config/config.php
-        $container->loadFromExtension('swiftmailer', array(
+        $container->loadFromExtension('swiftmailer', [
              // ...
 
-            'spool' => array(
+            'spool' => [
                 'type' => 'file',
                 'path' => '/path/to/spooldir',
-            ),
-        ));
+            ],
+        ]);
 
 .. tip::
 
diff --git a/event_dispatcher.rst b/event_dispatcher.rst
index af7a8f8c26f..edd79f985d7 100644
--- a/event_dispatcher.rst
+++ b/event_dispatcher.rst
@@ -104,7 +104,7 @@ using a special "tag":
 
         $container
             ->autowire(ExceptionListener::class)
-            ->addTag('kernel.event_listener', array('event' => 'kernel.exception'))
+            ->addTag('kernel.event_listener', ['event' => 'kernel.exception'])
         ;
 
 .. note::
@@ -151,13 +151,13 @@ listen to the same ``kernel.exception`` event::
         public static function getSubscribedEvents()
         {
             // return the subscribed events, their methods and priorities
-            return array(
-               KernelEvents::EXCEPTION => array(
-                   array('processException', 10),
-                   array('logException', 0),
-                   array('notifyException', -10),
-               )
-            );
+            return [
+               KernelEvents::EXCEPTION => [
+                   ['processException', 10],
+                   ['logException', 0],
+                   ['notifyException', -10],
+               ]
+            ];
         }
 
         public function processException(GetResponseForExceptionEvent $event)
diff --git a/event_dispatcher/before_after_filters.rst b/event_dispatcher/before_after_filters.rst
index 6e38cfe4846..afd5a6af014 100644
--- a/event_dispatcher/before_after_filters.rst
+++ b/event_dispatcher/before_after_filters.rst
@@ -66,10 +66,10 @@ parameters key:
     .. code-block:: php
 
         // app/config/config.php
-        $container->setParameter('tokens', array(
+        $container->setParameter('tokens', [
             'client1' => 'pass1',
             'client2' => 'pass2',
-        ));
+        ]);
 
 Tag Controllers to Be Checked
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
@@ -152,9 +152,9 @@ event listeners, you can learn more about them at :doc:`/event_dispatcher`::
 
         public static function getSubscribedEvents()
         {
-            return array(
+            return [
                 KernelEvents::CONTROLLER => 'onKernelController',
-            );
+            ];
         }
     }
 
@@ -227,10 +227,10 @@ header on the response if it's found::
 
     public static function getSubscribedEvents()
     {
-        return array(
+        return [
             KernelEvents::CONTROLLER => 'onKernelController',
             KernelEvents::RESPONSE => 'onKernelResponse',
-        );
+        ];
     }
 
 That's it! The ``TokenSubscriber`` is now notified before every controller is
diff --git a/event_dispatcher/method_behavior.rst b/event_dispatcher/method_behavior.rst
index ffd58b25d9c..2b179039c29 100644
--- a/event_dispatcher/method_behavior.rst
+++ b/event_dispatcher/method_behavior.rst
@@ -129,9 +129,9 @@ could listen to the ``mailer.post_send`` event and change the method's return va
 
         public static function getSubscribedEvents()
         {
-            return array(
+            return [
                 'mailer.post_send' => 'onMailerPostSend'
-            );
+            ];
         }
     }
 
diff --git a/form/action_method.rst b/form/action_method.rst
index 40a236292b0..dbb47685341 100644
--- a/form/action_method.rst
+++ b/form/action_method.rst
@@ -89,10 +89,10 @@ options:
             {
                 // ...
 
-                $form = $this->createForm(TaskType::class, $task, array(
+                $form = $this->createForm(TaskType::class, $task, [
                     'action' => $this->generateUrl('target_route'),
                     'method' => 'GET',
-                ));
+                ]);
 
                 // ...
             }
@@ -109,10 +109,10 @@ options:
 
         $formFactory = $formFactoryBuilder->getFormFactory();
 
-        $form = $formFactory->create(TaskType::class, $task, array(
+        $form = $formFactory->create(TaskType::class, $task, [
             'action' => '...',
             'method' => 'GET',
-        ));
+        ]);
 
 Finally, you can override the action and method in the template by passing them
 to the ``form()`` or the ``form_start()`` helper functions:
diff --git a/form/bootstrap4.rst b/form/bootstrap4.rst
index 386015744d0..56a6bd5753e 100644
--- a/form/bootstrap4.rst
+++ b/form/bootstrap4.rst
@@ -55,13 +55,13 @@ configuration:
     .. code-block:: php
 
         // config/packages/twig.php
-        $container->loadFromExtension('twig', array(
-            'form_themes' => array(
+        $container->loadFromExtension('twig', [
+            'form_themes' => [
                 'bootstrap_4_layout.html.twig',
-            ),
+            ],
 
             // ...
-        ));
+        ]);
 
 If you prefer to apply the Bootstrap styles on a form to form basis, include the
 ``form_theme`` tag in the templates where those forms are used:
diff --git a/form/button_based_validation.rst b/form/button_based_validation.rst
index 925d1dcdd40..613e6f325f6 100644
--- a/form/button_based_validation.rst
+++ b/form/button_based_validation.rst
@@ -24,9 +24,9 @@ so we set its ``validation_groups`` option to false::
 
     $form = $this->createFormBuilder($task)
         // ...
-        ->add('previousStep', SubmitType::class, array(
+        ->add('previousStep', SubmitType::class, [
             'validation_groups' => false,
-        ))
+        ])
         ->getForm();
 
 Now the form will skip your validation constraints. It will still validate
diff --git a/form/create_custom_field_type.rst b/form/create_custom_field_type.rst
index 37b7bfc8461..ace88c6d166 100644
--- a/form/create_custom_field_type.rst
+++ b/form/create_custom_field_type.rst
@@ -30,14 +30,14 @@ for form fields, which is ``<BundleName>\Form\Type``. Make sure the field extend
     {
         public function configureOptions(OptionsResolver $resolver)
         {
-            $resolver->setDefaults(array(
-                'choices' => array(
+            $resolver->setDefaults([
+                'choices' => [
                     'Standard Shipping' => 'standard',
                     'Expedited Shipping' => 'expedited',
                     'Priority Shipping' => 'priority',
-                ),
+                ],
                 'choices_as_values' => true,
-            ));
+            ]);
         }
 
         public function getParent()
@@ -183,11 +183,11 @@ link for details), create a ``shipping_widget`` block to handle this:
         .. code-block:: php
 
             // app/config/config.php
-            $container->loadFromExtension('twig', array(
-                'form_themes' => array(
+            $container->loadFromExtension('twig', [
+                'form_themes' => [
                     'form/fields.html.twig',
-                ),
-            ));
+                ],
+            ]);
 
     For the PHP templating engine, your configuration should look like this:
 
@@ -224,15 +224,15 @@ link for details), create a ``shipping_widget`` block to handle this:
         .. code-block:: php
 
             // app/config/config.php
-            $container->loadFromExtension('framework', array(
-                'templating' => array(
-                    'form' => array(
-                        'resources' => array(
+            $container->loadFromExtension('framework', [
+                'templating' => [
+                    'form' => [
+                        'resources' => [
                             ':form:fields.html.php',
-                        ),
-                    ),
-                ),
-            ));
+                        ],
+                    ],
+                ],
+            ]);
 
 Using the Field Type
 --------------------
@@ -251,9 +251,9 @@ new instance of the type in one of your forms::
     {
         public function buildForm(FormBuilderInterface $builder, array $options)
         {
-            $builder->add('shipping_code', ShippingType::class, array(
+            $builder->add('shipping_code', ShippingType::class, [
                 'placeholder' => 'Choose a delivery option',
-            ));
+            ]);
         }
     }
 
diff --git a/form/create_form_type_extension.rst b/form/create_form_type_extension.rst
index f90dfff1a4f..d11dfeb173d 100644
--- a/form/create_form_type_extension.rst
+++ b/form/create_form_type_extension.rst
@@ -99,9 +99,9 @@ your class as a service and using the  ``form.type_extension`` tag:
         use Symfony\Component\Form\Extension\Core\Type\FileType;
 
         $container->autowire(ImageTypeExtension::class)
-            ->addTag('form.type_extension', array(
+            ->addTag('form.type_extension', [
                 'extended_type' => FileType::class
-            ))
+            ])
         ;
 
 The ``extended_type`` key of the tag must match the class you're returning from
@@ -189,7 +189,7 @@ For example::
         public function configureOptions(OptionsResolver $resolver)
         {
             // makes it legal for FileType fields to have an image_property option
-            $resolver->setDefined(array('image_property'));
+            $resolver->setDefined(['image_property']);
         }
 
         public function buildView(FormView $view, FormInterface $form, array $options)
@@ -262,7 +262,7 @@ next to the file field. For example::
         {
             $builder
                 ->add('name', TextType::class)
-                ->add('file', FileType::class, array('image_property' => 'webPath'));
+                ->add('file', FileType::class, ['image_property' => 'webPath']);
         }
     }
 
diff --git a/form/csrf_protection.rst b/form/csrf_protection.rst
index 266555579c0..b46de4e67e9 100644
--- a/form/csrf_protection.rst
+++ b/form/csrf_protection.rst
@@ -40,13 +40,13 @@ The CSRF token can be customized on a form-by-form basis. For example::
 
         public function configureOptions(OptionsResolver $resolver)
         {
-            $resolver->setDefaults(array(
+            $resolver->setDefaults([
                 'data_class'      => Task::class,
                 'csrf_protection' => true,
                 'csrf_field_name' => '_token',
                 // a unique key to help generate the secret token
                 'csrf_token_id'   => 'task_item',
-            ));
+            ]);
         }
 
         // ...
diff --git a/form/data_based_validation.rst b/form/data_based_validation.rst
index 3e31be7cd67..de8e297f680 100644
--- a/form/data_based_validation.rst
+++ b/form/data_based_validation.rst
@@ -14,12 +14,12 @@ to an array callback::
     // ...
     public function configureOptions(OptionsResolver $resolver)
     {
-        $resolver->setDefaults(array(
-            'validation_groups' => array(
+        $resolver->setDefaults([
+            'validation_groups' => [
                 Client::class,
                 'determineValidationGroups',
-            ),
-        ));
+            ],
+        ]);
     }
 
 This will call the static method ``determineValidationGroups()`` on the
@@ -34,17 +34,17 @@ You can also define whole logic inline by using a ``Closure``::
     // ...
     public function configureOptions(OptionsResolver $resolver)
     {
-        $resolver->setDefaults(array(
+        $resolver->setDefaults([
             'validation_groups' => function (FormInterface $form) {
                 $data = $form->getData();
 
                 if (Client::TYPE_PERSON == $data->getType()) {
-                    return array('person');
+                    return ['person'];
                 }
 
-                return array('company');
+                return ['company'];
             },
-        ));
+        ]);
     }
 
 Using the ``validation_groups`` option overrides the default validation
@@ -58,17 +58,17 @@ of the entity as well you have to adjust the option as follows::
     // ...
     public function configureOptions(OptionsResolver $resolver)
     {
-        $resolver->setDefaults(array(
+        $resolver->setDefaults([
             'validation_groups' => function (FormInterface $form) {
                 $data = $form->getData();
 
                 if (Client::TYPE_PERSON == $data->getType()) {
-                    return array('Default', 'person');
+                    return ['Default', 'person'];
                 }
 
-                return array('Default', 'company');
+                return ['Default', 'company'];
             },
-        ));
+        ]);
     }
 
 You can find more information about how the validation groups and the default constraints
diff --git a/form/data_mappers.rst b/form/data_mappers.rst
index 30dbb7375eb..23bb8939fa8 100644
--- a/form/data_mappers.rst
+++ b/form/data_mappers.rst
@@ -159,17 +159,17 @@ method to configure the data mapper::
         public function buildForm(FormBuilderInterface $builder, array $options)
         {
             $builder
-                ->add('red', IntegerType::class, array(
+                ->add('red', IntegerType::class, [
                     // enforce the strictness of the type to ensure the constructor
                     // of the Color class doesn't break
                     'empty_data' => '0',
-                ))
-                ->add('green', IntegerType::class, array(
+                ])
+                ->add('green', IntegerType::class, [
                     'empty_data' => '0',
-                ))
-                ->add('blue', IntegerType::class, array(
+                ])
+                ->add('blue', IntegerType::class, [
                     'empty_data' => '0',
-                ))
+                ])
                 ->setDataMapper(new ColorMapper())
             ;
         }
diff --git a/form/data_transformers.rst b/form/data_transformers.rst
index 85a00d8803f..d330fa2719c 100644
--- a/form/data_transformers.rst
+++ b/form/data_transformers.rst
@@ -47,9 +47,9 @@ Suppose you have a Task form with a tags ``text`` type::
 
         public function configureOptions(OptionsResolver $resolver)
         {
-            $resolver->setDefaults(array(
+            $resolver->setDefaults([
                 'data_class' => Task::class,
-            ));
+            ]);
         }
 
         // ...
@@ -146,9 +146,9 @@ Start by setting up the text field like normal::
 
         public function configureOptions(OptionsResolver $resolver)
         {
-            $resolver->setDefaults(array(
+            $resolver->setDefaults([
                 'data_class' => Task::class,
-            ));
+            ]);
         }
 
         // ...
@@ -277,10 +277,10 @@ and type-hint the new class::
         {
             $builder
                 ->add('description', TextareaType::class)
-                ->add('issue', TextType::class, array(
+                ->add('issue', TextType::class, [
                     // validation message if the data transformer fails
                     'invalid_message' => 'That is not a valid issue number',
-                ));
+                ]);
 
             // ...
 
@@ -363,9 +363,9 @@ First, create the custom field type class::
 
         public function configureOptions(OptionsResolver $resolver)
         {
-            $resolver->setDefaults(array(
+            $resolver->setDefaults([
                 'invalid_message' => 'The selected issue does not exist',
-            ));
+            ]);
         }
 
         public function getParent()
diff --git a/form/direct_submit.rst b/form/direct_submit.rst
index 855043affc5..d53d6195f71 100644
--- a/form/direct_submit.rst
+++ b/form/direct_submit.rst
@@ -24,9 +24,9 @@ submissions::
             return $this->redirectToRoute('task_success');
         }
 
-        return $this->render('product/new.html.twig', array(
+        return $this->render('product/new.html.twig', [
             'form' => $form->createView(),
-        ));
+        ]);
     }
 
 .. tip::
@@ -63,9 +63,9 @@ method, pass the submitted data directly to
             }
         }
 
-        return $this->render('product/new.html.twig', array(
+        return $this->render('product/new.html.twig', [
             'form' => $form->createView(),
-        ));
+        ]);
     }
 
 .. tip::
diff --git a/form/disabling_validation.rst b/form/disabling_validation.rst
index cf02e417ef0..f23cc73dbbf 100644
--- a/form/disabling_validation.rst
+++ b/form/disabling_validation.rst
@@ -11,9 +11,9 @@ these cases you can set the ``validation_groups`` option to ``false``::
 
     public function configureOptions(OptionsResolver $resolver)
     {
-        $resolver->setDefaults(array(
+        $resolver->setDefaults([
             'validation_groups' => false,
-        ));
+        ]);
     }
 
 Note that when you do that, the form will still run basic integrity checks,
diff --git a/form/dynamic_form_modification.rst b/form/dynamic_form_modification.rst
index 025bc472df4..eef66d03de6 100644
--- a/form/dynamic_form_modification.rst
+++ b/form/dynamic_form_modification.rst
@@ -53,9 +53,9 @@ a bare form class looks like::
 
         public function configureOptions(OptionsResolver $resolver)
         {
-            $resolver->setDefaults(array(
+            $resolver->setDefaults([
                 'data_class' => Product::class,
-            ));
+            ]);
         }
     }
 
@@ -155,7 +155,7 @@ you can also move the logic for creating the ``name`` field to an
         {
             // Tells the dispatcher that you want to listen on the form.pre_set_data
             // event and that the preSetData method should be called.
-            return array(FormEvents::PRE_SET_DATA => 'preSetData');
+            return [FormEvents::PRE_SET_DATA => 'preSetData'];
         }
 
         public function preSetData(FormEvent $event)
@@ -294,14 +294,14 @@ security helper to fill in the listener logic::
 
                 $form = $event->getForm();
 
-                $formOptions = array(
+                $formOptions = [
                     'class' => User::class,
                     'choice_label' => 'fullName',
                     'query_builder' => function (UserRepository $userRepository) use ($user) {
                         // call a method on your repository that returns the query builder
                         // return $userRepository->createFriendsQueryBuilder($user);
                     },
-                );
+                ];
 
                 // create the field, this is similar the $builder->add()
                 // field name, field type, field options
@@ -385,10 +385,10 @@ sport like this::
         public function buildForm(FormBuilderInterface $builder, array $options)
         {
             $builder
-                ->add('sport', EntityType::class, array(
+                ->add('sport', EntityType::class, [
                     'class'       => 'AppBundle:Sport',
                     'placeholder' => '',
-                ))
+                ])
             ;
 
             $builder->addEventListener(
@@ -400,13 +400,13 @@ sport like this::
                     $data = $event->getData();
 
                     $sport = $data->getSport();
-                    $positions = null === $sport ? array() : $sport->getAvailablePositions();
+                    $positions = null === $sport ? [] : $sport->getAvailablePositions();
 
-                    $form->add('position', EntityType::class, array(
+                    $form->add('position', EntityType::class, [
                         'class' => 'AppBundle:Position',
                         'placeholder' => '',
                         'choices' => $positions,
-                    ));
+                    ]);
                 }
             );
         }
@@ -449,20 +449,20 @@ The type would now look like::
         public function buildForm(FormBuilderInterface $builder, array $options)
         {
             $builder
-                ->add('sport', EntityType::class, array(
+                ->add('sport', EntityType::class, [
                     'class'       => 'AppBundle:Sport',
                     'placeholder' => '',
-                ));
+                ]);
             ;
 
             $formModifier = function (FormInterface $form, Sport $sport = null) {
-                $positions = null === $sport ? array() : $sport->getAvailablePositions();
+                $positions = null === $sport ? [] : $sport->getAvailablePositions();
 
-                $form->add('position', EntityType::class, array(
+                $form->add('position', EntityType::class, [
                     'class' => 'AppBundle:Position',
                     'placeholder' => '',
                     'choices' => $positions,
-                ));
+                ]);
             };
 
             $builder->addEventListener(
@@ -528,7 +528,7 @@ your application. Assume that you have a sport meetup creation controller::
 
             return $this->render(
                 'meetup/create.html.twig',
-                array('form' => $form->createView())
+                ['form' => $form->createView()]
             );
         }
 
diff --git a/form/embedded.rst b/form/embedded.rst
index 0a1fc2b997b..a5b000727b3 100644
--- a/form/embedded.rst
+++ b/form/embedded.rst
@@ -83,9 +83,9 @@ create a form class so that a ``Category`` object can be modified by the user::
 
         public function configureOptions(OptionsResolver $resolver)
         {
-            $resolver->setDefaults(array(
+            $resolver->setDefaults([
                 'data_class' => Category::class,
-            ));
+            ]);
         }
     }
 
diff --git a/form/events.rst b/form/events.rst
index 3f1f9079c1f..380db9d1eca 100644
--- a/form/events.rst
+++ b/form/events.rst
@@ -318,7 +318,7 @@ callback for better readability::
                 ->add('show_email', CheckboxType::class)
                 ->addEventListener(
                     FormEvents::PRE_SET_DATA,
-                    array($this, 'onPreSetData')
+                    [$this, 'onPreSetData']
                 )
             ;
         }
@@ -352,10 +352,10 @@ Event subscribers have different uses:
     {
         public static function getSubscribedEvents()
         {
-            return array(
+            return [
                 FormEvents::PRE_SET_DATA => 'onPreSetData',
                 FormEvents::PRE_SUBMIT   => 'onPreSubmit',
-            );
+            ];
         }
 
         public function onPreSetData(FormEvent $event)
diff --git a/form/form_collections.rst b/form/form_collections.rst
index f8e0b13ca02..fa04ac38c8e 100644
--- a/form/form_collections.rst
+++ b/form/form_collections.rst
@@ -101,9 +101,9 @@ Then, create a form class so that a ``Tag`` object can be modified by the user::
 
         public function configureOptions(OptionsResolver $resolver)
         {
-            $resolver->setDefaults(array(
+            $resolver->setDefaults([
                 'data_class' => Tag::class,
-            ));
+            ]);
         }
     }
 
@@ -129,17 +129,17 @@ Notice that you embed a collection of ``TagType`` forms using the
         {
             $builder->add('description');
 
-            $builder->add('tags', CollectionType::class, array(
+            $builder->add('tags', CollectionType::class, [
                 'entry_type' => TagType::class,
-                'entry_options' => array('label' => false),
-            ));
+                'entry_options' => ['label' => false],
+            ]);
         }
 
         public function configureOptions(OptionsResolver $resolver)
         {
-            $resolver->setDefaults(array(
+            $resolver->setDefaults([
                 'data_class' => Task::class,
-            ));
+            ]);
         }
     }
 
@@ -178,9 +178,9 @@ In your controller, you'll create a new form from the ``TaskType``::
                 // ... maybe do some form processing, like saving the Task and Tag objects
             }
 
-            return $this->render('task/new.html.twig', array(
+            return $this->render('task/new.html.twig', [
                 'form' => $form->createView(),
-            ));
+            ]);
         }
     }
 
@@ -263,11 +263,11 @@ add the ``allow_add`` option to your collection field::
     {
         $builder->add('description');
 
-        $builder->add('tags', CollectionType::class, array(
+        $builder->add('tags', CollectionType::class, [
             'entry_type' => TagType::class,
-            'entry_options' => array('label' => false),
+            'entry_options' => ['label' => false],
             'allow_add' => true,
-        ));
+        ]);
     }
 
 In addition to telling the field to accept any number of submitted objects, the
@@ -426,10 +426,10 @@ Next, add a ``by_reference`` option to the ``tags`` field and set it to ``false`
     {
         // ...
 
-        $builder->add('tags', CollectionType::class, array(
+        $builder->add('tags', CollectionType::class, [
             // ...
             'by_reference' => false,
-        ));
+        ]);
     }
 
 With these two changes, when the form is submitted, each new ``Tag`` object
@@ -558,10 +558,10 @@ Start by adding the ``allow_delete`` option in the form Type::
     {
         // ...
 
-        $builder->add('tags', CollectionType::class, array(
+        $builder->add('tags', CollectionType::class, [
             // ...
             'allow_delete' => true,
-        ));
+        ]);
     }
 
 Now, you need to put some code into the ``removeTag()`` method of ``Task``::
@@ -697,7 +697,7 @@ the relationship between the removed ``Tag`` and ``Task`` object.
                 $entityManager->flush();
 
                 // redirect back to some edit page
-                return $this->redirectToRoute('task_edit', array('id' => $id));
+                return $this->redirectToRoute('task_edit', ['id' => $id]);
             }
 
             // render some form template
diff --git a/form/form_customization.rst b/form/form_customization.rst
index cc60fdcdcdc..e5140506ce7 100644
--- a/form/form_customization.rst
+++ b/form/form_customization.rst
@@ -450,13 +450,13 @@ rendered.
     .. code-block:: php
 
         // app/config/config.php
-        $container->loadFromExtension('twig', array(
-            'form_themes' => array(
+        $container->loadFromExtension('twig', [
+            'form_themes' => [
                 'form/fields.html.twig',
-            ),
+            ],
 
             // ...
-        ));
+        ]);
 
 By default, Twig uses a *div* layout when rendering forms. Some people, however,
 may prefer to render forms in a *table* layout. Use the ``form_table_layout.html.twig``
@@ -493,13 +493,13 @@ resource to use such a layout:
     .. code-block:: php
 
         // app/config/config.php
-        $container->loadFromExtension('twig', array(
-            'form_themes' => array(
+        $container->loadFromExtension('twig', [
+            'form_themes' => [
                 'form_table_layout.html.twig',
-            ),
+            ],
 
             // ...
-        ));
+        ]);
 
 If you only want to make the change in one template, add the following line to
 your template file rather than adding the template as a resource:
@@ -555,9 +555,9 @@ field whose *id* is ``product_name`` (and name is ``product[name]``).
         {
             // ...
 
-            $builder->add('name', TextType::class, array(
+            $builder->add('name', TextType::class, [
                 'block_name' => 'custom_name',
-            ));
+            ]);
         }
 
     Then the block name will be ``_product_custom_name_widget``.
diff --git a/form/form_dependencies.rst b/form/form_dependencies.rst
index 977eef9d0c8..49a99c541bd 100644
--- a/form/form_dependencies.rst
+++ b/form/form_dependencies.rst
@@ -39,9 +39,9 @@ create your form::
         $entityManager = $this->getDoctrine()->getManager();
 
         $task = ...;
-        $form = $this->createForm(TaskType::class, $task, array(
+        $form = $this->createForm(TaskType::class, $task, [
             'entity_manager' => $entityManager,
-        ));
+        ]);
 
         // ...
     }
diff --git a/form/form_themes.rst b/form/form_themes.rst
index 0cda20b727f..3fb3b3e0303 100644
--- a/form/form_themes.rst
+++ b/form/form_themes.rst
@@ -204,13 +204,13 @@ file:
     .. code-block:: php
 
         // app/config/config.php
-        $container->loadFromExtension('twig', array(
-            'form_themes' => array(
+        $container->loadFromExtension('twig', [
+            'form_themes' => [
                 '...',
                 'form/fields.html.twig',
-            ),
+            ],
             // ...
-        ));
+        ]);
 
 .. note::
 
@@ -297,16 +297,16 @@ file:
     .. code-block:: php
 
         // app/config/config.php
-        $container->loadFromExtension('framework', array(
-            'templating' => array(
-                'form' => array(
-                    'resources' => array(
+        $container->loadFromExtension('framework', [
+            'templating' => [
+                'form' => [
+                    'resources' => [
                         'form',
-                    ),
-                ),
-            ),
+                    ],
+                ],
+            ],
             // ...
-        ));
+        ]);
 
 Any fragments inside the ``app/Resources/views/form`` directory are now used
 globally to define form output.
diff --git a/form/inherit_data_option.rst b/form/inherit_data_option.rst
index 024bc52c00d..07f53826529 100644
--- a/form/inherit_data_option.rst
+++ b/form/inherit_data_option.rst
@@ -105,9 +105,9 @@ for that::
 
         public function configureOptions(OptionsResolver $resolver)
         {
-            $resolver->setDefaults(array(
+            $resolver->setDefaults([
                 'inherit_data' => true,
-            ));
+            ]);
         }
     }
 
@@ -133,9 +133,9 @@ Finally, make this work by adding the location form to your two original forms::
     {
         // ...
 
-        $builder->add('foo', LocationType::class, array(
+        $builder->add('foo', LocationType::class, [
             'data_class' => Company::class,
-        ));
+        ]);
     }
 
 .. code-block:: php
@@ -148,9 +148,9 @@ Finally, make this work by adding the location form to your two original forms::
     {
         // ...
 
-        $builder->add('bar', LocationType::class, array(
+        $builder->add('bar', LocationType::class, [
             'data_class' => Customer::class,
-        ));
+        ]);
     }
 
 That's it! You have extracted duplicated field definitions to a separate
diff --git a/form/multiple_buttons.rst b/form/multiple_buttons.rst
index 21ea8fcb579..1965e941f62 100644
--- a/form/multiple_buttons.rst
+++ b/form/multiple_buttons.rst
@@ -11,8 +11,8 @@ To do this, add a second button with the caption "Save and add" to your form::
     $form = $this->createFormBuilder($task)
         ->add('task', TextType::class)
         ->add('dueDate', DateType::class)
-        ->add('save', SubmitType::class, array('label' => 'Create Task'))
-        ->add('saveAndAdd', SubmitType::class, array('label' => 'Save and Add'))
+        ->add('save', SubmitType::class, ['label' => 'Create Task'])
+        ->add('saveAndAdd', SubmitType::class, ['label' => 'Save and Add'])
         ->getForm();
 
 In your controller, use the button's
diff --git a/form/type_guesser.rst b/form/type_guesser.rst
index bdfc2f0cfbf..489901b2bba 100644
--- a/form/type_guesser.rst
+++ b/form/type_guesser.rst
@@ -108,25 +108,25 @@ With this knowledge, you can easily implement the ``guessType()`` method of the
                 case 'string':
                     // there is a high confidence that the type is text when
                     // @var string is used
-                    return new TypeGuess(TextType::class, array(), Guess::HIGH_CONFIDENCE);
+                    return new TypeGuess(TextType::class, [], Guess::HIGH_CONFIDENCE);
 
                 case 'int':
                 case 'integer':
                     // integers can also be the id of an entity or a checkbox (0 or 1)
-                    return new TypeGuess(IntegerType::class, array(), Guess::MEDIUM_CONFIDENCE);
+                    return new TypeGuess(IntegerType::class, [], Guess::MEDIUM_CONFIDENCE);
 
                 case 'float':
                 case 'double':
                 case 'real':
-                    return new TypeGuess(NumberType::class, array(), Guess::MEDIUM_CONFIDENCE);
+                    return new TypeGuess(NumberType::class, [], Guess::MEDIUM_CONFIDENCE);
 
                 case 'boolean':
                 case 'bool':
-                    return new TypeGuess(CheckboxType::class, array(), Guess::HIGH_CONFIDENCE);
+                    return new TypeGuess(CheckboxType::class, [], Guess::HIGH_CONFIDENCE);
 
                 default:
                     // there is a very low confidence that this one is correct
-                    return new TypeGuess(TextType::class, array(), Guess::LOW_CONFIDENCE);
+                    return new TypeGuess(TextType::class, [], Guess::LOW_CONFIDENCE);
             }
         }
 
@@ -136,7 +136,7 @@ With this knowledge, you can easily implement the ``guessType()`` method of the
             $phpdoc = $reflectionProperty->getDocComment();
 
             // parse the $phpdoc into an array like:
-            // array('var' => 'string', 'since' => '1.0')
+            // ['var' => 'string', 'since' => '1.0']
             $phpdocTags = ...;
 
             return $phpdocTags;
diff --git a/form/unit_testing.rst b/form/unit_testing.rst
index 36c515c6932..fff9274ad42 100644
--- a/form/unit_testing.rst
+++ b/form/unit_testing.rst
@@ -42,10 +42,10 @@ The simplest ``TypeTestCase`` implementation looks like the following::
     {
         public function testSubmitValidData()
         {
-            $formData = array(
+            $formData = [
                 'test' => 'test',
                 'test2' => 'test2',
-            );
+            ];
 
             $objectToCompare = new TestObject();
             // $objectToCompare will retrieve data from the form submission; pass it as the second argument
@@ -150,10 +150,10 @@ make sure the ``FormRegistry`` uses the created instance::
             // create a type instance with the mocked dependencies
             $type = new TestedType($this->objectManager);
 
-            return array(
+            return [
                 // register the type instances with the PreloadedExtension
-                new PreloadedExtension(array($type), array()),
-            );
+                new PreloadedExtension([$type], []),
+            ];
         }
 
         public function testSubmitValidData()
@@ -205,9 +205,9 @@ allows you to return a list of extensions to register::
                 ->method('getMetadataFor')
                 ->will($this->returnValue(new ClassMetadata(Form::class)));
 
-            return array(
+            return [
                 new ValidatorExtension($this->validator),
-            );
+            ];
         }
 
         // ... your tests
diff --git a/form/use_empty_data.rst b/form/use_empty_data.rst
index 8591d0ef865..284dd12c863 100644
--- a/form/use_empty_data.rst
+++ b/form/use_empty_data.rst
@@ -62,9 +62,9 @@ that constructor with no arguments::
 
         public function configureOptions(OptionsResolver $resolver)
         {
-            $resolver->setDefaults(array(
+            $resolver->setDefaults([
                 'empty_data' => new Blog($this->someDependency),
-            ));
+            ]);
         }
     }
 
@@ -93,9 +93,9 @@ The closure must accept a ``FormInterface`` instance as the first argument::
 
     public function configureOptions(OptionsResolver $resolver)
     {
-        $resolver->setDefaults(array(
+        $resolver->setDefaults([
             'empty_data' => function (FormInterface $form) {
                 return new Blog($form->get('title')->getData());
             },
-        ));
+        ]);
     }
diff --git a/form/validation_group_service_resolver.rst b/form/validation_group_service_resolver.rst
index ec575067696..c77c92f66aa 100644
--- a/form/validation_group_service_resolver.rst
+++ b/form/validation_group_service_resolver.rst
@@ -29,7 +29,7 @@ parameter::
          */
         public function __invoke(FormInterface $form)
         {
-            $groups = array();
+            $groups = [];
 
             // ... determine which groups to apply and return an array
 
@@ -58,9 +58,9 @@ Then in your form, inject the resolver and set it as the ``validation_groups``::
         // ...
         public function configureOptions(OptionsResolver $resolver)
         {
-            $resolver->setDefaults(array(
+            $resolver->setDefaults([
                 'validation_groups' => $this->groupResolver,
-            ));
+            ]);
         }
     }
 
diff --git a/form/validation_groups.rst b/form/validation_groups.rst
index 6d8f75196ba..2b8d87e43e5 100644
--- a/form/validation_groups.rst
+++ b/form/validation_groups.rst
@@ -10,9 +10,9 @@ Validation Groups
 If your object takes advantage of :doc:`validation groups </validation/groups>`,
 you'll need to specify which validation group(s) your form should use::
 
-    $form = $this->createFormBuilder($user, array(
-        'validation_groups' => array('registration'),
-    ))->add(...);
+    $form = $this->createFormBuilder($user, [
+        'validation_groups' => ['registration'],
+    ])->add(...);
 
 If you're creating :ref:`form classes <form-creating-form-classes>` (a good
 practice), then you'll need to add the following to the ``configureOptions()``
@@ -22,13 +22,13 @@ method::
 
     public function configureOptions(OptionsResolver $resolver)
     {
-        $resolver->setDefaults(array(
-            'validation_groups' => array('registration'),
-        ));
+        $resolver->setDefaults([
+            'validation_groups' => ['registration'],
+        ]);
     }
 
 In both of these cases, *only* the ``registration`` validation group will
 be used to validate the underlying object. To apply the ``registration``
 group *and* all constraints that are not in a group, use::
 
-    'validation_groups' => array('Default', 'registration')
+    'validation_groups' => ['Default', 'registration']
diff --git a/form/without_class.rst b/form/without_class.rst
index e0a6959582e..5934d12ac58 100644
--- a/form/without_class.rst
+++ b/form/without_class.rst
@@ -17,7 +17,7 @@ an array of the submitted data. This is actually really easy::
 
     public function contactAction(Request $request)
     {
-        $defaultData = array('message' => 'Type your message here');
+        $defaultData = ['message' => 'Type your message here'];
         $form = $this->createFormBuilder($defaultData)
             ->add('name', TextType::class)
             ->add('email', EmailType::class)
@@ -87,15 +87,15 @@ but here's a short example::
     public function buildForm(FormBuilderInterface $builder, array $options)
     {
         $builder
-           ->add('firstName', TextType::class, array(
-               'constraints' => new Length(array('min' => 3)),
-           ))
-           ->add('lastName', TextType::class, array(
-               'constraints' => array(
+           ->add('firstName', TextType::class, [
+               'constraints' => new Length(['min' => 3]),
+           ])
+           ->add('lastName', TextType::class, [
+               'constraints' => [
                    new NotBlank(),
-                   new Length(array('min' => 3)),
-               ),
-           ))
+                   new Length(['min' => 3]),
+               ],
+           ])
         ;
     }
 
@@ -107,7 +107,7 @@ but here's a short example::
 
     .. code-block:: php
 
-        new NotBlank(array('groups' => array('create', 'update')));
+        new NotBlank(['groups' => ['create', 'update']]);
 
 .. tip::
 
diff --git a/forms.rst b/forms.rst
index 771462b60ea..0596254d57e 100644
--- a/forms.rst
+++ b/forms.rst
@@ -100,12 +100,12 @@ from inside a controller::
             $form = $this->createFormBuilder($task)
                 ->add('task', TextType::class)
                 ->add('dueDate', DateType::class)
-                ->add('save', SubmitType::class, array('label' => 'Create Task'))
+                ->add('save', SubmitType::class, ['label' => 'Create Task'])
                 ->getForm();
 
-            return $this->render('default/new.html.twig', array(
+            return $this->render('default/new.html.twig', [
                 'form' => $form->createView(),
-            ));
+            ]);
         }
     }
 
@@ -224,7 +224,7 @@ your controller::
         $form = $this->createFormBuilder($task)
             ->add('task', TextType::class)
             ->add('dueDate', DateType::class)
-            ->add('save', SubmitType::class, array('label' => 'Create Task'))
+            ->add('save', SubmitType::class, ['label' => 'Create Task'])
             ->getForm();
 
         $form->handleRequest($request);
@@ -243,9 +243,9 @@ your controller::
             return $this->redirectToRoute('task_success');
         }
 
-        return $this->render('default/new.html.twig', array(
+        return $this->render('default/new.html.twig', [
             'form' => $form->createView(),
-        ));
+        ]);
     }
 
 .. caution::
@@ -444,7 +444,7 @@ boxes. However, the :doc:`DateType </reference/forms/types/date>` can be
 configured to be rendered as a single text box (where the user would enter
 the date as a string in the box)::
 
-    ->add('dueDate', DateType::class, array('widget' => 'single_text'))
+    ->add('dueDate', DateType::class, ['widget' => 'single_text'])
 
 .. image:: /_images/form/simple-form-2.png
     :align: center
@@ -462,10 +462,10 @@ the documentation for each type.
     :ref:`disable HTML5 validation <forms-html5-validation-disable>`
     or set the ``required`` option on your field to ``false``::
 
-        ->add('dueDate', DateType::class, array(
+        ->add('dueDate', DateType::class, [
             'widget' => 'single_text',
             'required' => false
-        ))
+        ])
 
     Also note that setting the ``required`` option to ``true`` will **not**
     result in server-side validation to be applied. In other words, if a
@@ -481,10 +481,10 @@ the documentation for each type.
     The label for the form field can be set using the ``label`` option,
     which can be applied to any field::
 
-        ->add('dueDate', DateType::class, array(
+        ->add('dueDate', DateType::class, [
             'widget' => 'single_text',
             'label'  => 'Due Date',
-        ))
+        ])
 
     The label for a field can also be set in the template rendering the
     form, see below. If you don't need a label associated to your input,
@@ -510,7 +510,7 @@ guess from the validation rules that both the ``task`` field is a normal
 
         $form = $this->createFormBuilder($task)
             ->add('task')
-            ->add('dueDate', null, array('widget' => 'single_text'))
+            ->add('dueDate', null, ['widget' => 'single_text'])
             ->add('save', SubmitType::class)
             ->getForm();
     }
@@ -563,7 +563,7 @@ the correct values of a number of field options.
 If you'd like to change one of the guessed values, you can override it by
 passing the option in the options field array::
 
-    ->add('task', null, array('attr' => array('maxlength' => 4)))
+    ->add('task', null, ['attr' => ['maxlength' => 4]])
 
 .. index::
    single: Forms; Creating form classes
@@ -591,7 +591,7 @@ that will house the logic for building the task form::
         {
             $builder
                 ->add('task')
-                ->add('dueDate', null, array('widget' => 'single_text'))
+                ->add('dueDate', null, ['widget' => 'single_text'])
                 ->add('save', SubmitType::class)
             ;
         }
@@ -634,9 +634,9 @@ the choice is ultimately up to you.
         // ...
         public function configureOptions(OptionsResolver $resolver)
         {
-            $resolver->setDefaults(array(
+            $resolver->setDefaults([
                 'data_class' => Task::class,
-            ));
+            ]);
         }
 
 .. tip::
@@ -656,7 +656,7 @@ the choice is ultimately up to you.
             $builder
                 ->add('task')
                 ->add('dueDate')
-                ->add('agreeTerms', CheckboxType::class, array('mapped' => false))
+                ->add('agreeTerms', CheckboxType::class, ['mapped' => false])
                 ->add('save', SubmitType::class)
             ;
         }
diff --git a/frontend/assetic/apply_to_option.rst b/frontend/assetic/apply_to_option.rst
index 02507a8028f..983792f748c 100644
--- a/frontend/assetic/apply_to_option.rst
+++ b/frontend/assetic/apply_to_option.rst
@@ -51,15 +51,15 @@ An example configuration might look like this:
     .. code-block:: php
 
         // app/config/config.php
-        $container->loadFromExtension('assetic', array(
-            'filters' => array(
-                'coffee' => array(
+        $container->loadFromExtension('assetic', [
+            'filters' => [
+                'coffee' => [
                     'bin'  => '/usr/bin/coffee',
                     'node' => '/usr/bin/node',
-                    'node_paths' => array('/usr/lib/node_modules/'),
-                ),
-            ),
-        ));
+                    'node_paths' => ['/usr/lib/node_modules/'],
+                ],
+            ],
+        ]);
 
 Filter a single File
 --------------------
@@ -147,16 +147,16 @@ In this case you can specify that the ``coffee`` filter is applied to all
     .. code-block:: php
 
         // app/config/config.php
-        $container->loadFromExtension('assetic', array(
-            'filters' => array(
-                'coffee' => array(
+        $container->loadFromExtension('assetic', [
+            'filters' => [
+                'coffee' => [
                     'bin'        => '/usr/bin/coffee',
                     'node'       => '/usr/bin/node',
-                    'node_paths' => array('/usr/lib/node_modules/'),
+                    'node_paths' => ['/usr/lib/node_modules/'],
                     'apply_to'   => '\.coffee$',
-                ),
-            ),
-        ));
+                ],
+            ],
+        ]);
 
 With this option, you no longer need to specify the ``coffee`` filter in the
 template. You can also list regular JavaScript files, all of which will be
diff --git a/frontend/assetic/asset_management.rst b/frontend/assetic/asset_management.rst
index 62f9d50734f..748d6f2dbc5 100644
--- a/frontend/assetic/asset_management.rst
+++ b/frontend/assetic/asset_management.rst
@@ -26,10 +26,10 @@ Then, enable the bundle in the ``AppKernel.php`` file of your Symfony applicatio
 
         public function registerBundles()
         {
-            $bundles = array(
+            $bundles = [
                 // ...
                 new Symfony\Bundle\AsseticBundle\AsseticBundle(),
-            );
+            ];
 
             // ...
         }
@@ -73,14 +73,14 @@ your application:
     .. code-block:: php
 
         // app/config/config.php
-        $container->loadFromExtension('assetic', array(
+        $container->loadFromExtension('assetic', [
             'debug' => '%kernel.debug%',
             'use_controller' => '%kernel.debug%',
-            'filters' => array(
+            'filters' => [
                 'cssrewrite' => null,
-            ),
+            ],
             // ...
-        ));
+        ]);
 
         // ...
 
@@ -338,16 +338,16 @@ configuration under the ``assetic`` section. Read more in the
     .. code-block:: php
 
         // app/config/config.php
-        $container->loadFromExtension('assetic', array(
-            'assets' => array(
-                'jquery_and_ui' => array(
-                    'inputs' => array(
+        $container->loadFromExtension('assetic', [
+            'assets' => [
+                'jquery_and_ui' => [
+                    'inputs' => [
                         '@AppBundle/Resources/public/js/thirdparty/jquery.js',
                         '@AppBundle/Resources/public/js/thirdparty/jquery.ui.js',
-                    ),
-                ),
-            ),
-        ));
+                    ],
+                ],
+            ],
+        ]);
 
 After you have defined the named assets, you can reference them in your templates
 with the ``@named_asset`` notation:
@@ -418,13 +418,13 @@ should be defined:
     .. code-block:: php
 
         // app/config/config.php
-        $container->loadFromExtension('assetic', array(
-            'filters' => array(
-                'uglifyjs2' => array(
+        $container->loadFromExtension('assetic', [
+            'filters' => [
+                'uglifyjs2' => [
                     'bin' => '/usr/local/bin/uglifyjs',
-                ),
-            ),
-        ));
+                ],
+            ],
+        ]);
 
 Now, to actually *use* the filter on a group of JavaScript files, add it
 into your template:
@@ -542,9 +542,9 @@ the following change in your ``config_dev.yml`` file:
     .. code-block:: php
 
         // app/config/config_dev.php
-        $container->loadFromExtension('assetic', array(
+        $container->loadFromExtension('assetic', [
             'use_controller' => false,
-        ));
+        ]);
 
 Next, since Symfony is no longer generating these assets for you, you'll
 need to dump them manually. To do so, run the following command:
diff --git a/frontend/assetic/jpeg_optimize.rst b/frontend/assetic/jpeg_optimize.rst
index 324975cbae7..17d8dfb4d5c 100644
--- a/frontend/assetic/jpeg_optimize.rst
+++ b/frontend/assetic/jpeg_optimize.rst
@@ -51,13 +51,13 @@ using the ``bin`` option of the ``jpegoptim`` filter:
     .. code-block:: php
 
         // app/config/config.php
-        $container->loadFromExtension('assetic', array(
-            'filters' => array(
-                'jpegoptim' => array(
+        $container->loadFromExtension('assetic', [
+            'filters' => [
+                'jpegoptim' => [
                     'bin' => 'path/to/jpegoptim',
-                ),
-            ),
-        ));
+                ],
+            ],
+        ]);
 
 It can now be used from a template:
 
@@ -109,14 +109,14 @@ to ``true``:
     .. code-block:: php
 
         // app/config/config.php
-        $container->loadFromExtension('assetic', array(
-            'filters' => array(
-                'jpegoptim' => array(
+        $container->loadFromExtension('assetic', [
+            'filters' => [
+                'jpegoptim' => [
                     'bin'       => 'path/to/jpegoptim',
                     'strip_all' => 'true',
-                ),
-            ),
-        ));
+                ],
+            ],
+        ]);
 
 Lowering Maximum Quality
 ~~~~~~~~~~~~~~~~~~~~~~~~
@@ -160,14 +160,14 @@ be at the expense of its quality:
     .. code-block:: php
 
         // app/config/config.php
-        $container->loadFromExtension('assetic', array(
-            'filters' => array(
-                'jpegoptim' => array(
+        $container->loadFromExtension('assetic', [
+            'filters' => [
+                'jpegoptim' => [
                     'bin' => 'path/to/jpegoptim',
                     'max' => '70',
-                ),
-            ),
-        ));
+                ],
+            ],
+        ]);
 
 Shorter Syntax: Twig Function
 -----------------------------
@@ -215,16 +215,16 @@ following configuration:
     .. code-block:: php
 
         // app/config/config.php
-        $container->loadFromExtension('assetic', array(
-            'filters' => array(
-                'jpegoptim' => array(
+        $container->loadFromExtension('assetic', [
+            'filters' => [
+                'jpegoptim' => [
                     'bin' => 'path/to/jpegoptim',
-                ),
-            ),
-            'twig' => array(
-                'functions' => array('jpegoptim'),
-            ),
-        ));
+                ],
+            ],
+            'twig' => [
+                'functions' => ['jpegoptim'],
+            ],
+        ]);
 
 The Twig template can now be changed to the following:
 
@@ -275,20 +275,20 @@ file:
     .. code-block:: php
 
         // app/config/config.php
-        $container->loadFromExtension('assetic', array(
-            'filters' => array(
-                'jpegoptim' => array(
+        $container->loadFromExtension('assetic', [
+            'filters' => [
+                'jpegoptim' => [
                     'bin' => 'path/to/jpegoptim',
-                ),
-            ),
-            'twig' => array(
-                'functions' => array(
-                    'jpegoptim' => array(
+                ],
+            ],
+            'twig' => [
+                'functions' => [
+                    'jpegoptim' => [
                         'output' => 'images/*.jpg',
-                    ),
-                ),
-            ),
-        ));
+                    ],
+                ],
+            ],
+        ]);
 
 .. tip::
 
diff --git a/frontend/assetic/php.rst b/frontend/assetic/php.rst
index bea6f2f8946..2ed40409430 100644
--- a/frontend/assetic/php.rst
+++ b/frontend/assetic/php.rst
@@ -106,14 +106,14 @@ First, configure a new ``scssphp`` Assetic filter:
     .. code-block:: php
 
         // app/config/config.php
-        $container->loadFromExtension('assetic', array(
-            'filters' => array(
-                 'scssphp' => array(
+        $container->loadFromExtension('assetic', [
+            'filters' => [
+                 'scssphp' => [
                      'formatter' => 'Leafo\ScssPhp\Formatter\Compressed',
-                 ),
+                 ],
                  // ...
-            ),
-        ));
+            ],
+        ]);
 
 The value of the ``formatter`` option is the fully qualified class name of the
 formatter used by the filter to produce the compiled CSS file. Using the
@@ -179,12 +179,12 @@ First, configure a new ``jsqueeze`` Assetic filter as follows:
     .. code-block:: php
 
         // app/config/config.php
-        $container->loadFromExtension('assetic', array(
-            'filters' => array(
+        $container->loadFromExtension('assetic', [
+            'filters' => [
                  'jsqueeze' => null,
                  // ...
-            ),
-        ));
+            ],
+        ]);
 
 Next, update the code of your Twig template to add the ``{% javascripts %}`` tag
 defined by Assetic:
diff --git a/frontend/assetic/uglifyjs.rst b/frontend/assetic/uglifyjs.rst
index c255c309121..2a322495dd1 100644
--- a/frontend/assetic/uglifyjs.rst
+++ b/frontend/assetic/uglifyjs.rst
@@ -111,14 +111,14 @@ your JavaScripts:
     .. code-block:: php
 
         // app/config/config.php
-        $container->loadFromExtension('assetic', array(
-            'filters' => array(
-                'uglifyjs2' => array(
+        $container->loadFromExtension('assetic', [
+            'filters' => [
+                'uglifyjs2' => [
                     // the path to the uglifyjs executable
                     'bin' => '/usr/local/bin/uglifyjs',
-                ),
-            ),
-        ));
+                ],
+            ],
+        ]);
 
 .. note::
 
@@ -179,13 +179,13 @@ can configure its location using the ``node`` key:
     .. code-block:: php
 
         // app/config/config.php
-        $container->loadFromExtension('assetic', array(
+        $container->loadFromExtension('assetic', [
             'node'      => '/usr/bin/nodejs',
-            'uglifyjs2' => array(
+            'uglifyjs2' => [
                 // the path to the uglifyjs executable
                 'bin' => '/usr/local/bin/uglifyjs',
-            ),
-        ));
+            ],
+        ]);
 
 Minify your Assets
 ------------------
@@ -282,13 +282,13 @@ Next, add the configuration for this filter:
     .. code-block:: php
 
         // app/config/config.php
-        $container->loadFromExtension('assetic', array(
-            'filters' => array(
-                'uglifycss' => array(
+        $container->loadFromExtension('assetic', [
+            'filters' => [
+                'uglifycss' => [
                     'bin' => '/usr/local/bin/uglifycss',
-                ),
-            ),
-        ));
+                ],
+            ],
+        ]);
 
 To use the filter for your CSS files, add the filter to the Assetic ``stylesheets``
 helper:
diff --git a/frontend/assetic/yuicompressor.rst b/frontend/assetic/yuicompressor.rst
index 6a02a005545..0f6eb5820e7 100644
--- a/frontend/assetic/yuicompressor.rst
+++ b/frontend/assetic/yuicompressor.rst
@@ -67,17 +67,17 @@ stylesheets:
     .. code-block:: php
 
         // app/config/config.php
-        $container->loadFromExtension('assetic', array(
+        $container->loadFromExtension('assetic', [
             // 'java' => '/usr/bin/java',
-            'filters' => array(
-                'yui_css' => array(
+            'filters' => [
+                'yui_css' => [
                     'jar' => '%kernel.project_dir%/app/Resources/java/yuicompressor.jar',
-                ),
-                'yui_js' => array(
+                ],
+                'yui_js' => [
                     'jar' => '%kernel.project_dir%/app/Resources/java/yuicompressor.jar',
-                ),
-            ),
-        ));
+                ],
+            ],
+        ]);
 
 .. note::
 
diff --git a/frontend/custom_version_strategy.rst b/frontend/custom_version_strategy.rst
index 1dcd2754667..5979bae7d65 100644
--- a/frontend/custom_version_strategy.rst
+++ b/frontend/custom_version_strategy.rst
@@ -151,10 +151,10 @@ After creating the strategy PHP class, register it as a Symfony service.
 
         $container->autowire(GulpBusterVersionStrategy::class)
             ->setArguments(
-                array(
+                [
                     '%kernel.project_dir%/busters.json',
                     '%%s?version=%%s',
-                )
+                ]
         )->setPublic(false);
 
 Finally, enable the new asset versioning for all the application assets or just
@@ -191,11 +191,11 @@ the :ref:`version_strategy <reference-assets-version-strategy>` option:
         // app/config/config.php
         use AppBundle\Asset\VersionStrategy\GulpBusterVersionStrategy;
 
-        $container->loadFromExtension('framework', array(
+        $container->loadFromExtension('framework', [
             // ...
-            'assets' => array(
+            'assets' => [
                 'version_strategy' => GulpBusterVersionStrategy::class,
-            ),
-        ));
+            ],
+        ]);
 
 .. _`gulp-buster`: https://www.npmjs.com/package/gulp-buster
diff --git a/http_cache.rst b/http_cache.rst
index 0001b357d29..2f77a314a22 100644
--- a/http_cache.rst
+++ b/http_cache.rst
@@ -127,10 +127,10 @@ method::
     {
         protected function getOptions()
         {
-            return array(
+            return [
                 'default_ttl' => 0,
                 // ...
-            );
+            ];
         }
     }
 
@@ -318,14 +318,14 @@ Additionally, most cache-related HTTP headers can be set via the single
 :method:`Symfony\\Component\\HttpFoundation\\Response::setCache` method::
 
     // sets cache settings in one call
-    $response->setCache(array(
+    $response->setCache([
         'etag'          => $etag,
         'last_modified' => $date,
         'max_age'       => 10,
         's_maxage'      => 10,
         'public'        => true,
         // 'private'    => true,
-    ));
+    ]);
 
 Cache Invalidation
 ------------------
diff --git a/http_cache/cache_vary.rst b/http_cache/cache_vary.rst
index 04348dd05a8..1dbbf9a0fc4 100644
--- a/http_cache/cache_vary.rst
+++ b/http_cache/cache_vary.rst
@@ -39,7 +39,7 @@ header::
     $response->setVary('Accept-Encoding');
 
     // sets multiple vary headers
-    $response->setVary(array('Accept-Encoding', 'User-Agent'));
+    $response->setVary(['Accept-Encoding', 'User-Agent']);
 
 The ``setVary()`` method takes a header name or an array of header names for
 which the response varies.
diff --git a/http_cache/esi.rst b/http_cache/esi.rst
index e414f1c4833..b22d3582b58 100644
--- a/http_cache/esi.rst
+++ b/http_cache/esi.rst
@@ -88,10 +88,10 @@ First, to use ESI, be sure to enable it in your application configuration:
     .. code-block:: php
 
         // app/config/config.php
-        $container->loadFromExtension('framework', array(
+        $container->loadFromExtension('framework', [
             // ...
-            'esi' => array('enabled' => true),
-        ));
+            'esi' => ['enabled' => true],
+        ]);
 
 Now, suppose you have a page that is relatively static, except for a news
 ticker at the bottom of the content. With ESI, you can cache the news ticker
@@ -218,10 +218,10 @@ that must be enabled in your configuration:
     .. code-block:: php
 
         // app/config/config.php
-        $container->loadFromExtension('framework', array(
+        $container->loadFromExtension('framework', [
             // ...
-            'fragments' => array('path' => '/_fragment'),
-        ));
+            'fragments' => ['path' => '/_fragment'],
+        ]);
 
 One great advantage of the ESI renderer is that you can make your application
 as dynamic as needed and at the same time, hit the application as little as
diff --git a/http_cache/validation.rst b/http_cache/validation.rst
index 15e76ec4212..7951cb7d618 100644
--- a/http_cache/validation.rst
+++ b/http_cache/validation.rst
@@ -217,10 +217,10 @@ exposing a simple and efficient pattern::
             $comments = ...;
 
             // or render a template with the $response you've already started
-            return $this->render('article/show.html.twig', array(
+            return $this->render('article/show.html.twig', [
                 'article' => $article,
                 'comments' => $comments,
-            ), $response);
+            ], $response);
         }
     }
 
diff --git a/introduction/from_flat_php_to_symfony2.rst b/introduction/from_flat_php_to_symfony2.rst
index 17907f1c047..bd678900a5c 100644
--- a/introduction/from_flat_php_to_symfony2.rst
+++ b/introduction/from_flat_php_to_symfony2.rst
@@ -91,7 +91,7 @@ the code that prepares the HTML "presentation"::
 
     $result = $connection->query('SELECT id, title FROM post');
 
-    $posts = array();
+    $posts = [];
     while ($row = $result->fetch(PDO::FETCH_ASSOC)) {
         $posts[] = $row;
     }
@@ -163,7 +163,7 @@ of the application are isolated in a new file called ``model.php``::
 
         $result = $connection->query('SELECT id, title FROM post');
 
-        $posts = array();
+        $posts = [];
         while ($row = $result->fetch(PDO::FETCH_ASSOC)) {
             $posts[] = $row;
         }
@@ -486,7 +486,7 @@ incidentally, acts quite a bit like the Symfony templating engine::
     function list_action()
     {
         $posts = get_all_posts();
-        $html = render_template('templates/list.php', array('posts' => $posts));
+        $html = render_template('templates/list.php', ['posts' => $posts]);
 
         return new Response($html);
     }
@@ -494,7 +494,7 @@ incidentally, acts quite a bit like the Symfony templating engine::
     function show_action($id)
     {
         $post = get_post_by_id($id);
-        $html = render_template('templates/show.php', array('post' => $post));
+        $html = render_template('templates/show.php', ['post' => $post]);
 
         return new Response($html);
     }
@@ -555,7 +555,7 @@ them for you. Here's the same sample application, now built in Symfony::
                 ->createQuery('SELECT p FROM AppBundle:Post p')
                 ->execute();
 
-            return $this->render('Blog/list.html.php', array('posts' => $posts));
+            return $this->render('Blog/list.html.php', ['posts' => $posts]);
         }
 
         public function showAction($id)
@@ -569,7 +569,7 @@ them for you. Here's the same sample application, now built in Symfony::
                 throw $this->createNotFoundException();
             }
 
-            return $this->render('Blog/show.html.php', array('post' => $post));
+            return $this->render('Blog/show.html.php', ['post' => $post]);
         }
     }
 
@@ -595,7 +595,7 @@ database and the Templating component to render a template and return a
         <li>
             <a href="<?= $view['router']->path(
                 'blog_show',
-                array('id' => $post->getId())
+                ['id' => $post->getId()]
             ) ?>">
                 <?= $post->getTitle() ?>
             </a>
diff --git a/introduction/http_fundamentals.rst b/introduction/http_fundamentals.rst
index 4d261617dc3..13c14800dc9 100644
--- a/introduction/http_fundamentals.rst
+++ b/introduction/http_fundamentals.rst
@@ -337,7 +337,7 @@ A very simple front controller might look like this::
     $request = Request::createFromGlobals();
     $path = $request->getPathInfo(); // the URI path being requested
 
-    if (in_array($path, array('', '/'))) {
+    if (in_array($path, ['', '/'])) {
         $response = new Response('Welcome to the homepage.');
     } elseif ('/contact' === $path) {
         $response = new Response('Contact us');
diff --git a/logging.rst b/logging.rst
index 56a3675bc44..a44d51a4e98 100644
--- a/logging.rst
+++ b/logging.rst
@@ -35,10 +35,10 @@ To log a message, inject the default logger in your controller::
         $logger->info('I just got the logger');
         $logger->error('An error occurred');
 
-        $logger->critical('I left the oven on!', array(
+        $logger->critical('I left the oven on!', [
             // include extra "context" info in your logs
             'cause' => 'in_hurry',
-        ));
+        ]);
 
         // ...
     }
@@ -147,19 +147,19 @@ to write logs using the :phpfunction:`syslog` function:
     .. code-block:: php
 
         // app/config/config.php
-        $container->loadFromExtension('monolog', array(
-            'handlers' => array(
-                'file_log' => array(
+        $container->loadFromExtension('monolog', [
+            'handlers' => [
+                'file_log' => [
                     'type'  => 'stream',
                     'path'  => '%kernel.logs_dir%/%kernel.environment%.log',
                     'level' => 'debug',
-                ),
-                'syslog_handler' => array(
+                ],
+                'syslog_handler' => [
                     'type'  => 'syslog',
                     'level' => 'error',
-                ),
-            ),
-        ));
+                ],
+            ],
+        ]);
 
 This defines a *stack* of handlers and each handler is called in the order that it's
 defined.
@@ -232,24 +232,24 @@ one of the messages reaches an ``action_level``. Take this example:
     .. code-block:: php
 
         // app/config/config.php
-        $container->loadFromExtension('monolog', array(
-            'handlers' => array(
-                'filter_for_errors' => array(
+        $container->loadFromExtension('monolog', [
+            'handlers' => [
+                'filter_for_errors' => [
                     'type'         => 'fingers_crossed',
                     'action_level' => 'error',
                     'handler'      => 'file_log',
-                ),
-                'file_log' => array(
+                ],
+                'file_log' => [
                     'type'  => 'stream',
                     'path'  => '%kernel.logs_dir%/%kernel.environment%.log',
                     'level' => 'debug',
-                ),
-                'syslog_handler' => array(
+                ],
+                'syslog_handler' => [
                     'type'  => 'syslog',
                     'level' => 'error',
-                ),
+                ],
             ),
-        ));
+        ]);
 
 Now, if even one log entry has an ``error`` level or higher, then *all* log entries
 for that request are saved to a file via the ``file_log`` handler. That means that
@@ -329,18 +329,18 @@ option of your handler to ``rotating_file``:
     .. code-block:: php
 
         // app/config/config_dev.php
-        $container->loadFromExtension('monolog', array(
-            'handlers' => array(
-                'main' => array(
+        $container->loadFromExtension('monolog', [
+            'handlers' => [
+                'main' => [
                     'type'  => 'rotating_file',
                     'path'  => '%kernel.logs_dir%/%kernel.environment%.log',
                     'level' => 'debug',
                     // max number of log files to keep
                     // defaults to zero, which means infinite files
                     'max_files' => 10,
-                ),
-            ),
-        ));
+                ],
+            ],
+        ]);
 
 Using a Logger inside a Service
 -------------------------------
diff --git a/logging/channels_handlers.rst b/logging/channels_handlers.rst
index 76ed1ee6efa..7ac4ff60f86 100644
--- a/logging/channels_handlers.rst
+++ b/logging/channels_handlers.rst
@@ -77,23 +77,23 @@ in all environments, or just ``config_prod.yml`` to happen only in ``prod``:
     .. code-block:: php
 
         // app/config/config.php
-        $container->loadFromExtension('monolog', array(
-            'handlers' => array(
-                'security' => array(
+        $container->loadFromExtension('monolog', [
+            'handlers' => [
+                'security' => [
                     'type'     => 'stream',
                     'path'     => '%kernel.logs_dir%/security.log',
-                    'channels' => array(
+                    'channels' => [
                         'security',
-                    ),
-                ),
-                'main'     => array(
+                    ],
+                ],
+                'main'     => [
                     // ...
-                    'channels' => array(
+                    'channels' => [
                         '!security',
-                    ),
-                ),
-            ),
-        ));
+                    ],
+                ],
+            ],
+        ]);
 
 .. caution::
 
@@ -162,12 +162,12 @@ You can also configure additional channels without the need to tag your services
     .. code-block:: php
 
         // app/config/config.php
-        $container->loadFromExtension('monolog', array(
-            'channels' => array(
+        $container->loadFromExtension('monolog', [
+            'channels' => [
                 'foo',
                 'bar',
-            ),
-        ));
+            ],
+        ]);
 
 Symfony automatically registers one service per channel (in this example, the
 channel ``foo`` creates a service called ``monolog.logger.foo``). In order to
diff --git a/logging/disable_microsecond_precision.rst b/logging/disable_microsecond_precision.rst
index 5e090b45072..442c742c768 100644
--- a/logging/disable_microsecond_precision.rst
+++ b/logging/disable_microsecond_precision.rst
@@ -45,13 +45,13 @@ log generation. This is recommended for systems that generate a large number of
     .. code-block:: php
 
         // app/config/config.php
-        $container->loadFromExtension('monolog', array(
+        $container->loadFromExtension('monolog', [
             'use_microseconds' => false,
-            'handlers' => array(
-                'applog' => array(
+            'handlers' => [
+                'applog' => [
                     'type'  => 'stream',
                     'path'  => '/var/log/symfony.log',
                     'level' => 'error',
-                ),
-            ),
-        ));
+                ],
+            ],
+        ]);
diff --git a/logging/formatter.rst b/logging/formatter.rst
index 56c0d0cb986..f5a0683c549 100644
--- a/logging/formatter.rst
+++ b/logging/formatter.rst
@@ -64,12 +64,12 @@ configure your handler to use it:
         $container->register(JsonFormatter::class);
 
         // app/config/config_prod.php (or config_dev.php)
-        $container->loadFromExtension('monolog', array(
-            'handlers' => array(
-                'file' => array(
+        $container->loadFromExtension('monolog', [
+            'handlers' => [
+                'file' => [
                     'type'      => 'stream',
                     'level'     => 'debug',
                     'formatter' => JsonFormatter::class,
-                ),
-            ),
-        ));
+                ],
+            ],
+        ]);
diff --git a/logging/monolog_console.rst b/logging/monolog_console.rst
index 293f4b86e99..36013cd7835 100644
--- a/logging/monolog_console.rst
+++ b/logging/monolog_console.rst
@@ -98,15 +98,15 @@ example, in ``config_dev.yml``:
     .. code-block:: php
 
         // app/config/config.php
-        $container->loadFromExtension('monolog', array(
-            'handlers' => array(
-                'console' => array(
-                   'type' => 'console',
-                   'process_psr_3_messages' => false,
-                   'channels' => array('!event', '!doctrine', '!console'),
-                ),
-            ),
-        ));
+        $container->loadFromExtension('monolog', [
+            'handlers' => [
+                'console' => [
+                    'type' => 'console',
+                    'process_psr_3_messages' => false,
+                    'channels' => ['!event', '!doctrine', '!console'],
+                ],
+            ],
+        ]);
 
 Now, log messages will be shown on the console based on the log levels and verbosity.
 By default (normal verbosity level), warnings and higher will be shown. But in
diff --git a/logging/monolog_email.rst b/logging/monolog_email.rst
index f6845f57990..2a989655be8 100644
--- a/logging/monolog_email.rst
+++ b/logging/monolog_email.rst
@@ -94,36 +94,36 @@ it is broken down.
     .. code-block:: php
 
         // app/config/config_prod.php
-        $container->loadFromExtension('monolog', array(
-            'handlers' => array(
-                'main' => array(
+        $container->loadFromExtension('monolog', [
+            'handlers' => [
+                'main' => [
                     'type'         => 'fingers_crossed',
                     // 500 errors are logged at the critical level
                     'action_level' => 'critical',
                     // to also log 400 level errors (but not 404's):
                     // 'action_level' => 'error',
-                    // 'excluded_404s' => array(
+                    // 'excluded_404s' => [
                     //     '^/',
-                    // ),
+                    // ],
                     'handler'      => 'deduplicated',
-                ),
-                'deduplicated' => array(
+                ],
+                'deduplicated' => [
                     'type'    => 'deduplication',
                     'handler' => 'swift',
-                ),
-                'swift' => array(
+                ],
+                'swift' => [
                     'type'         => 'swift_mailer',
                     'from_email'   => 'error@example.com',
                     'to_email'     => 'error@example.com',
                     // or a list of recipients
-                    // 'to_email'   => array('dev1@example.com', 'dev2@example.com', ...),
+                    // 'to_email'   => ['dev1@example.com', 'dev2@example.com', ...],
                     'subject'      => 'An Error Occurred! %%message%%',
                     'level'        => 'debug',
                     'formatter'    => 'monolog.formatter.html',
                     'content_type' => 'text/html',
-                ),
-            ),
-        ));
+                ],
+            ],
+        ]);
 
 The ``main`` handler is a ``fingers_crossed`` handler which means that
 it is only triggered when the action level, in this case ``critical`` is reached.
@@ -172,15 +172,15 @@ You can adjust the time period using the ``time`` option:
     .. code-block:: php
 
         // app/config/config_prod.php
-        $container->loadFromExtension('monolog', array(
-            'handlers' => array(
+        $container->loadFromExtension('monolog', [
+            'handlers' => [
                 // ...
-                'deduplicated' => array(
+                'deduplicated' => [
                     'type'    => 'deduplication',
                     // the time in seconds during which duplicate entries are discarded (default: 60)
                     'time' => 10,
                     'handler' => 'swift',
-                 )
+                ]
 
 The messages are then passed to the ``swift`` handler. This is the handler that
 actually deals with emailing you the error. The settings for this are
@@ -278,39 +278,39 @@ get logged on the server as well as the emails being sent:
     .. code-block:: php
 
         // app/config/config_prod.php
-        $container->loadFromExtension('monolog', array(
-            'handlers' => array(
-                'main' => array(
+        $container->loadFromExtension('monolog', [
+            'handlers' => [
+                'main' => [
                     'type'         => 'fingers_crossed',
                     'action_level' => 'critical',
                     'handler'      => 'grouped',
-                ),
-                'grouped' => array(
+                ],
+                'grouped' => [
                     'type'    => 'group',
-                    'members' => array('streamed', 'deduplicated'),
-                ),
-                'streamed'  => array(
+                    'members' => ['streamed', 'deduplicated'],
+                ],
+                'streamed'  => [
                     'type'  => 'stream',
                     'path'  => '%kernel.logs_dir%/%kernel.environment%.log',
                     'level' => 'debug',
-                ),
-                'deduplicated' => array(
+                ],
+                'deduplicated' => [
                     'type'     => 'deduplication',
                     'handler'  => 'swift',
-                ),
-                'swift' => array(
+                ],
+                'swift' => [
                     'type'         => 'swift_mailer',
                     'from_email'   => 'error@example.com',
                     'to_email'     => 'error@example.com',
                     // or a list of recipients
-                    // 'to_email'   => array('dev1@example.com', 'dev2@example.com', ...),
+                    // 'to_email'   => ['dev1@example.com', 'dev2@example.com', ...],
                     'subject'      => 'An Error Occurred! %%message%%',
                     'level'        => 'debug',
                     'formatter'    => 'monolog.formatter.html',
                     'content_type' => 'text/html',
-                ),
-            ),
-        ));
+                ],
+            ],
+        ]);
 
 This uses the ``group`` handler to send the messages to the two
 group members, the ``deduplicated`` and the ``stream`` handlers. The messages will
diff --git a/logging/monolog_regex_based_excludes.rst b/logging/monolog_regex_based_excludes.rst
index 51df5adf716..7bb2f8a99cc 100644
--- a/logging/monolog_regex_based_excludes.rst
+++ b/logging/monolog_regex_based_excludes.rst
@@ -48,15 +48,15 @@ configuration:
     .. code-block:: php
 
         // app/config/config.php
-        $container->loadFromExtension('monolog', array(
-            'handlers' => array(
-                'main' => array(
+        $container->loadFromExtension('monolog', [
+            'handlers' => [
+                'main' => [
                     // ...
                     'type'          => 'fingers_crossed',
                     'handler'       => ...,
-                    'excluded_404s' => array(
+                    'excluded_404s' => [
                         '^/phpmyadmin',
-                    ),
-                ),
-            ),
-        ));
+                    ],
+                ],
+            ],
+        ]);
diff --git a/logging/processors.rst b/logging/processors.rst
index 1ba38aaaae3..70da931b02e 100644
--- a/logging/processors.rst
+++ b/logging/processors.rst
@@ -102,7 +102,7 @@ information:
 
         $container
             ->autowire(SessionRequestProcessor::class)
-            ->addTag('monolog.processor', array('method' => 'processRecord'));
+            ->addTag('monolog.processor', ['method' => 'processRecord']);
 
 Finally, set the formatter to be used on whatever handler you want:
 
@@ -145,16 +145,16 @@ Finally, set the formatter to be used on whatever handler you want:
     .. code-block:: php
 
         // app/config/config.php
-        $container->loadFromExtension('monolog', array(
-            'handlers' => array(
-                'main' => array(
+        $container->loadFromExtension('monolog', [
+            'handlers' => [
+                'main' => [
                     'type'      => 'stream',
                     'path'      => '%kernel.logs_dir%/%kernel.environment%.log',
                     'level'     => 'debug',
                     'formatter' => 'monolog.formatter.session_request',
-                ),
-            ),
-        ));
+                ],
+            ],
+        ]);
 
 If you use several handlers, you can also register a processor at the
 handler level or at the channel level instead of registering it globally
@@ -203,7 +203,7 @@ the ``monolog.processor`` tag:
         // ...
         $container
             ->autowire(SessionRequestProcessor::class)
-            ->addTag('monolog.processor', array('handler' => 'main'));
+            ->addTag('monolog.processor', ['handler' => 'main']);
 
 Registering Processors per Channel
 ----------------------------------
@@ -248,4 +248,4 @@ the ``monolog.processor`` tag:
         // ...
         $container
             ->autowire(SessionRequestProcessor::class)
-            ->addTag('monolog.processor', array('channel' => 'main'));
+            ->addTag('monolog.processor', ['channel' => 'main']);
diff --git a/page_creation.rst b/page_creation.rst
index 7e86bb78860..441b869f170 100644
--- a/page_creation.rst
+++ b/page_creation.rst
@@ -131,9 +131,9 @@ variable so we can render that::
         {
             $number = random_int(0, 100);
 
-            return $this->render('lucky/number.html.twig', array(
+            return $this->render('lucky/number.html.twig', [
                 'number' => $number,
-            ));
+            ]);
         }
     }
 
@@ -207,11 +207,11 @@ Bundles are registered in your ``app/AppKernel.php`` file (a rare PHP file in th
     {
         public function registerBundles()
         {
-            $bundles = array(
+            $bundles = [
                 new Symfony\Bundle\FrameworkBundle\FrameworkBundle(),
                 new Symfony\Bundle\TwigBundle\TwigBundle(),
                 // ...
-            );
+            ];
             // ...
 
             return $bundles;
diff --git a/profiler/data_collector.rst b/profiler/data_collector.rst
index 3eb694d64af..809aaa51b4c 100644
--- a/profiler/data_collector.rst
+++ b/profiler/data_collector.rst
@@ -32,15 +32,15 @@ request::
     {
         public function collect(Request $request, Response $response, \Exception $exception = null)
         {
-            $this->data = array(
+            $this->data = [
                 'method' => $request->getMethod(),
                 'acceptable_content_types' => $request->getAcceptableContentTypes(),
-            );
+            ];
         }
 
         public function reset()
         {
-            $this->data = array();
+            $this->data = [];
         }
 
         public function getName()
@@ -278,11 +278,11 @@ to specify a tag that contains the template:
         $container
             ->autowire(RequestCollector::class)
             ->setPublic(false)
-            ->addTag('data_collector', array(
+            ->addTag('data_collector', [
                 'template' => 'data_collector/template.html.twig',
                 'id'       => 'app.request_collector',
                 // 'priority' => 300,
-            ))
+            ])
         ;
 
 The position of each panel in the toolbar is determined by the priority defined
diff --git a/profiler/matchers.rst b/profiler/matchers.rst
index c3ec0d51281..3e88de8c2ea 100644
--- a/profiler/matchers.rst
+++ b/profiler/matchers.rst
@@ -58,14 +58,14 @@ configuration:
     .. code-block:: php
 
         // app/config/config.php
-        $container->loadFromExtension('framework', array(
+        $container->loadFromExtension('framework', [
             // ...
-            'profiler' => array(
-                'matcher' => array(
+            'profiler' => [
+                'matcher' => [
                     'ip' => '168.0.0.1',
-                )
-            ),
-        ));
+                ]
+            ],
+        ]);
 
 You can also set a ``path`` option to define the path on which the profiler
 should be enabled. For instance, setting it to ``^/admin/`` will enable the
@@ -153,11 +153,11 @@ profiler to use this service as the matcher:
         // app/config/config.php
         use AppBundle\Profiler\SuperAdminMatcher;
 
-        $container->loadFromExtension('framework', array(
+        $container->loadFromExtension('framework', [
             // ...
-            'profiler' => array(
-                'matcher' => array(
+            'profiler' => [
+                'matcher' => [
                     'service' => SuperAdminMatcher::class,
-                )
-            ),
-        ));
+                ]
+            ],
+        ]);
diff --git a/profiler/storage.rst b/profiler/storage.rst
index f4bdaaca061..b4879540ef8 100644
--- a/profiler/storage.rst
+++ b/profiler/storage.rst
@@ -43,11 +43,11 @@ directory. If you want to use another location to store the profiles, define the
         // app/config/config.php
 
         // ...
-        $container->loadFromExtension('framework', array(
-            'profiler' => array(
+        $container->loadFromExtension('framework', [
+            'profiler' => [
                 'dsn' => 'file:/tmp/symfony/profiler',
-            ),
-        ));
+            ],
+        ]);
 
 You can also create your own profile storage service implementing the
 :class:`Symfony\\Component\\HttpKernel\\Profiler\\ProfilerStorageInterface` and
diff --git a/quick_tour/the_architecture.rst b/quick_tour/the_architecture.rst
index 4130cd063ae..1c0b6325663 100644
--- a/quick_tour/the_architecture.rst
+++ b/quick_tour/the_architecture.rst
@@ -111,7 +111,7 @@ a single Bundle class that describes it::
     // app/AppKernel.php
     public function registerBundles()
     {
-        $bundles = array(
+        $bundles = [
             new Symfony\Bundle\FrameworkBundle\FrameworkBundle(),
             new Symfony\Bundle\SecurityBundle\SecurityBundle(),
             new Symfony\Bundle\TwigBundle\TwigBundle(),
@@ -121,9 +121,9 @@ a single Bundle class that describes it::
             new Symfony\Bundle\AsseticBundle\AsseticBundle(),
             new Sensio\Bundle\FrameworkExtraBundle\SensioFrameworkExtraBundle(),
             new AppBundle\AppBundle(),
-        );
+        ];
 
-        if (in_array($this->getEnvironment(), array('dev', 'test'))) {
+        if (in_array($this->getEnvironment(), ['dev', 'test'])) {
             $bundles[] = new Symfony\Bundle\WebProfilerBundle\WebProfilerBundle();
             $bundles[] = new Sensio\Bundle\DistributionBundle\SensioDistributionBundle();
             $bundles[] = new Sensio\Bundle\GeneratorBundle\SensioGeneratorBundle();
diff --git a/quick_tour/the_controller.rst b/quick_tour/the_controller.rst
index bd299aca51a..9aef4a9b155 100644
--- a/quick_tour/the_controller.rst
+++ b/quick_tour/the_controller.rst
@@ -69,9 +69,9 @@ a new method called ``helloAction()`` with the following content::
          */
         public function helloAction($name)
         {
-            return $this->render('default/hello.html.twig', array(
+            return $this->render('default/hello.html.twig', [
                 'name' => $name,
-            ));
+            ]);
         }
     }
 
@@ -123,9 +123,9 @@ as its default value::
      */
     public function helloAction($name, $_format)
     {
-        return $this->render('default/hello.'.$_format.'.twig', array(
+        return $this->render('default/hello.'.$_format.'.twig', [
             'name' => $name,
-        ));
+        ]);
     }
 
 Obviously, when you support several request formats, you have to provide
@@ -165,9 +165,9 @@ option of the ``@Route()`` annotation::
      */
     public function helloAction($name, $_format)
     {
-        return $this->render('default/hello.'.$_format.'.twig', array(
+        return $this->render('default/hello.'.$_format.'.twig', [
             'name' => $name,
-        ));
+        ]);
     }
 
 The ``hello`` action will now match URLs like ``/hello/fabien.xml`` or
@@ -191,7 +191,7 @@ method::
          */
         public function indexAction()
         {
-            return $this->redirectToRoute('hello', array('name' => 'Fabien'));
+            return $this->redirectToRoute('hello', ['name' => 'Fabien']);
         }
     }
 
@@ -267,7 +267,7 @@ forget to add the new ``use`` statement that imports this ``Request`` class)::
             $isAjax = $request->isXmlHttpRequest();
 
             // what's the preferred language of the user?
-            $language = $request->getPreferredLanguage(array('en', 'fr'));
+            $language = $request->getPreferredLanguage(['en', 'fr']);
 
             // get the value of a $_GET parameter
             $pageName = $request->query->get('page');
diff --git a/quick_tour/the_view.rst b/quick_tour/the_view.rst
index b3741557d23..db281a3780d 100644
--- a/quick_tour/the_view.rst
+++ b/quick_tour/the_view.rst
@@ -54,9 +54,9 @@ To render a template in Symfony, use the ``render()`` method from within a
 controller. If the template needs variables to generate its contents, pass
 them as an array using the second optional argument::
 
-    $this->render('default/index.html.twig', array(
+    $this->render('default/index.html.twig', [
         'variable_name' => 'variable_value',
-    ));
+    ]);
 
 Variables passed to a template can be strings, arrays or even objects. Twig
 abstracts the difference between them and lets you access "attributes" of
@@ -67,24 +67,24 @@ on its type:
 .. code-block:: twig
 
     {# 1. Simple variables #}
-    {# $this->render('template.html.twig', array(
+    {# $this->render('template.html.twig', [
            'name' => 'Fabien',
-       )) #}
+       ]) #}
     {{ name }}
 
     {# 2. Arrays #}
-    {# $this->render('template.html.twig', array(
-           'user' => array('name' => 'Fabien'))
-       ) #}
+    {# $this->render('template.html.twig', [
+           'user' => ['name' => 'Fabien']
+       ]) #}
     {{ user.name }}
 
     {# alternative syntax for arrays #}
     {{ user['name'] }}
 
     {# 3. Objects #}
-    {# $this->render('template.html.twig', array(
-           'user' => new User('Fabien'))
-       ) #}
+    {# $this->render('template.html.twig', [
+           'user' => new User('Fabien')
+       ]) #}
     {{ user.name }}
     {{ user.getName }}
 
@@ -221,9 +221,9 @@ later)::
             // look for the most popular articles in the database
             $articles = ...;
 
-            return $this->render('default/top_articles.html.twig', array(
+            return $this->render('default/top_articles.html.twig', [
                 'articles' => $articles,
-            ));
+            ]);
         }
 
         // ...
diff --git a/reference/configuration/debug.rst b/reference/configuration/debug.rst
index 944a98c46e2..c57c26b1fac 100644
--- a/reference/configuration/debug.rst
+++ b/reference/configuration/debug.rst
@@ -98,6 +98,6 @@ destination for dumps. Typically, you would set this to ``php://stderr``:
     .. code-block:: php
 
         // app/config/config.php
-        $container->loadFromExtension('debug', array(
+        $container->loadFromExtension('debug', [
            'dump_destination' => 'php://stderr',
-        ));
+        ]);
diff --git a/reference/configuration/doctrine.rst b/reference/configuration/doctrine.rst
index de6b79da878..e263d47d241 100644
--- a/reference/configuration/doctrine.rst
+++ b/reference/configuration/doctrine.rst
@@ -341,14 +341,14 @@ directory instead:
 
     .. code-block:: php
 
-        $container->loadFromExtension('doctrine', array(
-            'orm' => array(
+        $container->loadFromExtension('doctrine', [
+            'orm' => [
                 'auto_mapping' => true,
-                'mappings' => array(
-                    'AppBundle' => array('dir' => 'SomeResources/config/doctrine', 'type' => 'xml'),
-                ),
-            ),
-        ));
+                'mappings' => [
+                    'AppBundle' => ['dir' => 'SomeResources/config/doctrine', 'type' => 'xml'],
+                ],
+            ],
+        ]);
 
 Mapping Entities Outside of a Bundle
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
@@ -400,20 +400,20 @@ namespace in the ``src/Entity`` directory and gives them an ``App`` alias
 
     .. code-block:: php
 
-        $container->loadFromExtension('doctrine', array(
-            'orm' => array(
+        $container->loadFromExtension('doctrine', [
+            'orm' => [
                 'auto_mapping' => true,
-                'mappings' => array(
-                    'SomeEntityNamespace' => array(
+                'mappings' => [
+                    'SomeEntityNamespace' => [
                         'type'      => 'annotation',
                         'dir'       => '%kernel.project_dir%/src/Entity',
                         'is_bundle' => false,
                         'prefix'    => 'App\Entity',
                         'alias'     => 'App',
-                    ),
-                ),
-            ),
-        ));
+                    ],
+                ],
+            ],
+        ]);
 
 Detecting a Mapping Configuration Format
 ........................................
diff --git a/reference/configuration/framework.rst b/reference/configuration/framework.rst
index be562afb786..fc07929a40f 100644
--- a/reference/configuration/framework.rst
+++ b/reference/configuration/framework.rst
@@ -302,9 +302,9 @@ doubling them to prevent Symfony from interpreting them as container parameters)
     .. code-block:: php
 
         // app/config/config.php
-        $container->loadFromExtension('framework', array(
+        $container->loadFromExtension('framework', [
             'ide' => 'myide://open?url=file://%%f&line=%%l',
-        ));
+        ]);
 
 Since every developer uses a different IDE, the recommended way to enable this
 feature is to configure it on a system level. This can be done by setting the
@@ -374,7 +374,7 @@ method.
 trusted_hosts
 ~~~~~~~~~~~~~
 
-**type**: ``array`` | ``string`` **default**: ``array()``
+**type**: ``array`` | ``string`` **default**: ``[]``
 
 A lot of different attacks have been discovered relying on inconsistencies
 in handling the ``Host`` header by various software (web servers, reverse
@@ -424,9 +424,9 @@ the application won't respond and the user will receive a 400 response.
     .. code-block:: php
 
         // app/config/config.php
-        $container->loadFromExtension('framework', array(
-            'trusted_hosts' => array('^example\.com$', '^example\.org$'),
-        ));
+        $container->loadFromExtension('framework', [
+            'trusted_hosts' => ['^example\.com$', '^example\.org$'],
+        ]);
 
 Hosts can also be configured to respond to any subdomain, via
 ``^(.+\.)?example\.com$`` for instance.
@@ -435,7 +435,7 @@ In addition, you can also set the trusted hosts in the front controller
 using the ``Request::setTrustedHosts()`` method::
 
     // web/app.php
-    Request::setTrustedHosts(array('^(.+\.)?example\.com$', '^(.+\.)?example\.org$'));
+    Request::setTrustedHosts(['^(.+\.)?example\.com$', '^(.+\.)?example\.org$']);
 
 The default value for this option is an empty array, meaning that the application
 can respond to any given host.
@@ -538,9 +538,9 @@ You can also set ``esi`` to ``true`` to enable it:
     .. code-block:: php
 
         // app/config/config.php
-        $container->loadFromExtension('framework', array(
+        $container->loadFromExtension('framework', [
             'esi' => true,
-        ));
+        ]);
 
 fragments
 ~~~~~~~~~
@@ -727,13 +727,13 @@ To configure a ``jsonp`` format:
     .. code-block:: php
 
         // app/config/config.php
-        $container->loadFromExtension('framework', array(
-            'request' => array(
-                'formats' => array(
+        $container->loadFromExtension('framework', [
+            'request' => [
+                'formats' => [
                     'jsonp' => 'application/javascript',
-                ),
-            ),
-        ));
+                ],
+            ],
+        ]);
 
 router
 ~~~~~~
@@ -941,11 +941,11 @@ setting the value to ``null``:
     .. code-block:: php
 
         // app/config/config.php
-        $container->loadFromExtension('framework', array(
-            'session' => array(
+        $container->loadFromExtension('framework', [
+            'session' => [
                 'save_path' => null,
-            ),
-        ));
+            ],
+        ]);
 
 .. _reference-session-metadata-update-threshold:
 
@@ -998,11 +998,11 @@ Whether to enable the session support in the framework.
     .. code-block:: php
 
         // app/config/config.php
-        $container->loadFromExtension('framework', array(
-            'session' => array(
+        $container->loadFromExtension('framework', [
+            'session' => [
                 'enabled' => true,
-            ),
-        ));
+            ],
+        ]);
 
 assets
 ~~~~~~
@@ -1045,12 +1045,12 @@ This option allows you to define a base path to be used for assets:
     .. code-block:: php
 
         // app/config/config.php
-        $container->loadFromExtension('framework', array(
+        $container->loadFromExtension('framework', [
             // ...
-            'assets' => array(
+            'assets' => [
                 'base_path' => '/images',
-            ),
-        ));
+            ],
+        ]);
 
 .. _reference-templating-base-urls:
 .. _reference-assets-base-urls:
@@ -1094,12 +1094,12 @@ collection each time it generates an asset's path:
     .. code-block:: php
 
         // app/config/config.php
-        $container->loadFromExtension('framework', array(
+        $container->loadFromExtension('framework', [
             // ...
-            'assets' => array(
-                'base_urls' => array('http://cdn.example.com/'),
-            ),
-        ));
+            'assets' => [
+                'base_urls' => ['http://cdn.example.com/'],
+            ],
+        ]);
 
 .. _reference-framework-assets-packages:
 
@@ -1143,16 +1143,16 @@ You can group assets into packages, to specify different base URLs for them:
     .. code-block:: php
 
         // app/config/config.php
-        $container->loadFromExtension('framework', array(
+        $container->loadFromExtension('framework', [
             // ...
-            'assets' => array(
-                'packages' => array(
-                    'avatars' => array(
+            'assets' => [
+                'packages' => [
+                    'avatars' => [
                         'base_urls' => 'http://static_cdn.example.com/avatars',
-                    ),
-                ),
-            ),
-        ));
+                    ],
+                ],
+            ],
+        ]);
 
 Now you can use the ``avatars`` package in your templates:
 
@@ -1220,12 +1220,12 @@ Now, activate the ``version`` option:
     .. code-block:: php
 
         // app/config/config.php
-        $container->loadFromExtension('framework', array(
+        $container->loadFromExtension('framework', [
             // ...
-            'assets' => array(
+            'assets' => [
                 'version' => 'v2',
-            ),
-        ));
+            ],
+        ]);
 
 Now, the same asset will be rendered as ``/images/logo.png?v2`` If you use
 this feature, you **must** manually increment the ``version`` value
@@ -1347,25 +1347,25 @@ individually for each asset package:
     .. code-block:: php
 
         // app/config/config.php
-        $container->loadFromExtension('framework', array(
-            'assets' => array(
+        $container->loadFromExtension('framework', [
+            'assets' => [
                 'version_strategy' => 'app.asset.my_versioning_strategy',
-                'packages' => array(
-                    'foo_package' => array(
+                'packages' => [
+                    'foo_package' => [
                         // this package removes any versioning (its assets won't be versioned)
                         'version' => null,
-                    ),
-                    'bar_package' => array(
+                    ],
+                    'bar_package' => [
                         // this package uses its own strategy (the default strategy is ignored)
                         'version_strategy' => 'app.asset.another_version_strategy',
-                    ),
-                    'baz_package' => array(
+                    ],
+                    'baz_package' => [
                         // this package inherits the default strategy
                         'base_path' => '/images',
-                    ),
-                ),
-            ),
-        ));
+                    ],
+                ],
+            ],
+        ]);
 
 .. note::
 
@@ -1443,22 +1443,22 @@ package:
     .. code-block:: php
 
         // app/config/config.php
-        $container->loadFromExtension('framework', array(
-            'assets' => array(
+        $container->loadFromExtension('framework', [
+            'assets' => [
                 // this manifest is applied to every asset (including packages)
                 'json_manifest_path' => '%kernel.project_dir%/web/assets/manifest.json',
-                'packages' => array(
-                    'foo_package' => array(
+                'packages' => [
+                    'foo_package' => [
                         // this package uses its own manifest (the default file is ignored)
                         'json_manifest_path' => '%kernel.project_dir%/web/assets/a_different_manifest.json',
-                    ),
-                    'bar_package' => array(
+                    ],
+                    'bar_package' => [
                         // this package uses the global manifest (the default file is used)
                         'base_path' => '/images',
-                    ),
-                ),
-            ),
-        ));
+                    ],
+                ],
+            ],
+        ]);
 
 .. note::
 
@@ -1543,15 +1543,15 @@ Assume you have custom global form themes in
     .. code-block:: php
 
         // app/config/config.php
-        $container->loadFromExtension('framework', array(
-            'templating' => array(
-                'form' => array(
-                    'resources' => array(
+        $container->loadFromExtension('framework', [
+            'templating' => [
+                'form' => [
+                    'resources' => [
                         'WebsiteBundle:Form',
-                    ),
-                ),
-            ),
-        ));
+                    ],
+                ],
+            ],
+        ]);
 
 .. note::
 
@@ -1614,7 +1614,7 @@ Whether or not to enable the ``translator`` service in the service container.
 fallbacks
 .........
 
-**type**: ``string|array`` **default**: ``array('en')``
+**type**: ``string|array`` **default**: ``['en']``
 
 This option is used when the translation key for the current locale wasn't
 found.
@@ -2041,16 +2041,16 @@ To configure a Redis cache pool with a default lifetime of 1 hour, do the follow
     .. code-block:: php
 
         // config/packages/framework.php
-        $container->loadFromExtension('framework', array(
-            'cache' => array(
-                'pools' => array(
-                    'cache.mycache' => array(
+        $container->loadFromExtension('framework', [
+            'cache' => [
+                'pools' => [
+                    'cache.mycache' => [
                         'adapter' => 'cache.adapter.redis',
                         'default_lifetime' => 3600,
-                    ),
-                ),
-            ),
-        ));
+                    ],
+                ],
+            ],
+        ]);
 
 .. _reference-cache-pools-name:
 
diff --git a/reference/configuration/security.rst b/reference/configuration/security.rst
index dd392160b41..2d91606214c 100644
--- a/reference/configuration/security.rst
+++ b/reference/configuration/security.rst
@@ -318,15 +318,15 @@ Using the BCrypt Password Encoder
         // app/config/security.php
         use Symfony\Component\Security\Core\User\User;
 
-        $container->loadFromExtension('security', array(
+        $container->loadFromExtension('security', [
             // ...
-            'encoders' => array(
-                User::class => array(
+            'encoders' => [
+                User::class => [
                     'algorithm' => 'bcrypt',
                     'cost'      => 15,
-                ),
-            ),
-        ));
+                ],
+            ],
+        ]);
 
 The ``cost`` can be in the range of ``4-31`` and determines how long a password
 will be encoded. Each increment of ``cost`` *doubles* the time it takes
@@ -395,14 +395,14 @@ Using the Argon2i Password Encoder
         // app/config/security.php
         use Symfony\Component\Security\Core\User\User;
 
-        $container->loadFromExtension('security', array(
+        $container->loadFromExtension('security', [
             // ...
-            'encoders' => array(
-                User::class => array(
+            'encoders' => [
+                User::class => [
                     'algorithm' => 'argon2i',
-                ),
-            ),
-        ));
+                ],
+            ],
+        ]);
 
 A salt for each new password is generated automatically and need not be
 persisted. Since an encoded password contains the salt used to encode it,
@@ -468,18 +468,18 @@ multiple firewalls, the "context" could actually be shared:
     .. code-block:: php
 
         // app/config/security.php
-        $container->loadFromExtension('security', array(
-            'firewalls' => array(
-                'somename' => array(
+        $container->loadFromExtension('security', [
+            'firewalls' => [
+                'somename' => [
                     // ...
                     'context' => 'my_context',
-                ),
-                'othername' => array(
+                ],
+                'othername' => [
                     // ...
                     'context' => 'my_context',
-                ),
-            ),
-        ));
+                ],
+            ],
+        ]);
 
 .. note::
 
@@ -539,16 +539,16 @@ To use HTTP-Digest authentication you need to provide a realm and a secret:
     .. code-block:: php
 
         // app/config/security.php
-        $container->loadFromExtension('security', array(
-            'firewalls' => array(
-                'somename' => array(
-                    'http_digest' => array(
+        $container->loadFromExtension('security', [
+            'firewalls' => [
+                'somename' => [
+                    'http_digest' => [
                         'secret' => '%secret%',
                         'realm'  => 'secure-api',
-                    ),
-                ),
-            ),
-        ));
+                    ],
+                ],
+            ],
+        ]);
 
 .. _`PBKDF2`: https://en.wikipedia.org/wiki/PBKDF2
 .. _`ircmaxell/password-compat`: https://packagist.org/packages/ircmaxell/password-compat
diff --git a/reference/configuration/swiftmailer.rst b/reference/configuration/swiftmailer.rst
index fec0550b7c0..d22c7980094 100644
--- a/reference/configuration/swiftmailer.rst
+++ b/reference/configuration/swiftmailer.rst
@@ -295,17 +295,17 @@ key (the default mailer is identified by the ``default_mailer`` option):
 
     .. code-block:: php
 
-        $container->loadFromExtension('swiftmailer', array(
+        $container->loadFromExtension('swiftmailer', [
             'default_mailer' => 'second_mailer',
-            'mailers' => array(
-                'first_mailer' => array(
+            'mailers' => [
+                'first_mailer' => [
                     // ...
-                ),
-                'second_mailer' => array(
+                ],
+                'second_mailer' => [
                     // ...
-                ),
-            ),
-        ));
+                ],
+            ],
+        ]);
 
 Each mailer is registered as a service::
 
diff --git a/reference/configuration/twig.rst b/reference/configuration/twig.rst
index b36d0e7e2d2..9e0ff7658eb 100644
--- a/reference/configuration/twig.rst
+++ b/reference/configuration/twig.rst
@@ -302,12 +302,12 @@ The values of the ``paths`` option are defined as ``key: value`` pairs where the
     .. code-block:: php
 
         // app/config/config.php
-        $container->loadFromExtension('twig', array(
+        $container->loadFromExtension('twig', [
             // ...
-            'paths' => array(
-               '%kernel.project_dir%/vendor/acme/foo-bar/templates' => null,
-            ),
-        ));
+            'paths' => [
+                '%kernel.project_dir%/vendor/acme/foo-bar/templates' => null,
+            ],
+        ]);
 
 The directories defined in the ``paths`` option have more priority than the
 default directories defined by Symfony. In the above example, if the template
@@ -346,12 +346,12 @@ for that directory:
     .. code-block:: php
 
         # app/config/config.php
-        $container->loadFromExtension('twig', array(
+        $container->loadFromExtension('twig', [
             // ...
-            'paths' => array(
-               '%kernel.project_dir%/vendor/acme/foo-bar/templates' => 'foo_bar',
-            ),
-        ));
+            'paths' => [
+                '%kernel.project_dir%/vendor/acme/foo-bar/templates' => 'foo_bar',
+            ],
+        ]);
 
 This option is useful to not mess with the default template directories defined
 by Symfony. Besides, it simplifies how you refer to those templates:
diff --git a/reference/constraints/All.rst b/reference/constraints/All.rst
index d3116fd4e51..6ace66df389 100644
--- a/reference/constraints/All.rst
+++ b/reference/constraints/All.rst
@@ -38,7 +38,7 @@ entry in that array:
              *     @Assert\Length(min=5)
              * })
              */
-             protected $favoriteColors = array();
+             protected $favoriteColors = [];
         }
 
     .. code-block:: yaml
@@ -86,12 +86,12 @@ entry in that array:
         {
             public static function loadValidatorMetadata(ClassMetadata $metadata)
             {
-                $metadata->addPropertyConstraint('favoriteColors', new Assert\All(array(
-                    'constraints' => array(
+                $metadata->addPropertyConstraint('favoriteColors', new Assert\All([
+                    'constraints' => [
                         new Assert\NotBlank(),
-                        new Assert\Length(array('min' => 5)),
-                    ),
-                )));
+                        new Assert\Length(['min' => 5]),
+                    ],
+                ]));
             }
         }
 
diff --git a/reference/constraints/Callback.rst b/reference/constraints/Callback.rst
index 34450676483..85c1ce4db30 100644
--- a/reference/constraints/Callback.rst
+++ b/reference/constraints/Callback.rst
@@ -106,7 +106,7 @@ field those errors should be attributed::
         public function validate(ExecutionContextInterface $context, $payload)
         {
             // somehow you have an array of "fake names"
-            $fakeNames = array(/* ... */);
+            $fakeNames = [/* ... */];
 
             // check if the name is actually a fake name
             if (in_array($this->getFirstName(), $fakeNames)) {
@@ -126,7 +126,7 @@ have access to the object instance, they receive the object as the first argumen
     public static function validate($object, ExecutionContextInterface $context, $payload)
     {
         // somehow you have an array of "fake names"
-        $fakeNames = array(/* ... */);
+        $fakeNames = [/* ... */];
 
         // check if the name is actually a fake name
         if (in_array($object->getFirstName(), $fakeNames)) {
@@ -211,10 +211,10 @@ You can then use the following configuration to invoke this validator:
         {
             public static function loadValidatorMetadata(ClassMetadata $metadata)
             {
-                $metadata->addConstraint(new Assert\Callback(array(
+                $metadata->addConstraint(new Assert\Callback([
                     Validator::class,
                     'validate',
-                )));
+                ]));
             }
         }
 
@@ -264,7 +264,7 @@ callback method:
 
 * A **string** containing the name of a concrete or static method;
 
-* An array callable with the format ``array('<Class>', '<method>')``;
+* An array callable with the format ``['<Class>', '<method>']``;
 
 * A closure.
 
diff --git a/reference/constraints/CardScheme.rst b/reference/constraints/CardScheme.rst
index 1b93186cf88..26784173e82 100644
--- a/reference/constraints/CardScheme.rst
+++ b/reference/constraints/CardScheme.rst
@@ -87,12 +87,12 @@ on an object that will contain a credit card number.
 
             public static function loadValidatorMetadata(ClassMetadata $metadata)
             {
-                $metadata->addPropertyConstraint('cardNumber', new Assert\CardScheme(array(
-                    'schemes' => array(
+                $metadata->addPropertyConstraint('cardNumber', new Assert\CardScheme([
+                    'schemes' => [
                         'VISA',
-                    ),
+                    ],
                     'message' => 'Your credit card number is invalid.',
-                )));
+                ]));
             }
         }
 
diff --git a/reference/constraints/Choice.rst b/reference/constraints/Choice.rst
index 89a67af8d3b..f671e7a36dd 100644
--- a/reference/constraints/Choice.rst
+++ b/reference/constraints/Choice.rst
@@ -113,13 +113,13 @@ If your valid choice list is simple, you can pass them in directly via the
             {
                 $metadata->addPropertyConstraint(
                     'city',
-                     new Assert\Choice(array('New York', 'Berlin', 'Tokyo'))
-                 );
+                    new Assert\Choice(['New York', 'Berlin', 'Tokyo'])
+                );
 
-                $metadata->addPropertyConstraint('genre', new Assert\Choice(array(
-                    'choices' => array('fiction', 'non-fiction'),
+                $metadata->addPropertyConstraint('genre', new Assert\Choice([
+                    'choices' => ['fiction', 'non-fiction'],
                     'message' => 'Choose a valid genre.',
-                )));
+                ]));
             }
         }
 
@@ -138,7 +138,7 @@ form element::
     {
         public static function getGenres()
         {
-            return array('fiction', 'non-fiction');
+            return ['fiction', 'non-fiction'];
         }
     }
 
@@ -205,9 +205,9 @@ constraint.
 
             public static function loadValidatorMetadata(ClassMetadata $metadata)
             {
-                $metadata->addPropertyConstraint('genre', new Assert\Choice(array(
+                $metadata->addPropertyConstraint('genre', new Assert\Choice([
                     'callback' => 'getGenres',
-                )));
+                ]));
             }
         }
 
@@ -274,9 +274,9 @@ you can pass the class name and the method as an array.
 
             public static function loadValidatorMetadata(ClassMetadata $metadata)
             {
-                $metadata->addPropertyConstraint('genre', new Assert\Choice(array(
-                    'callback' => array(Genre::class, 'getGenres'),
-                )));
+                $metadata->addPropertyConstraint('genre', new Assert\Choice([
+                    'callback' => [Genre::class, 'getGenres'],
+                ]));
             }
         }
 
diff --git a/reference/constraints/Collection.rst b/reference/constraints/Collection.rst
index 629957312fa..19d8205a107 100644
--- a/reference/constraints/Collection.rst
+++ b/reference/constraints/Collection.rst
@@ -37,10 +37,10 @@ of a collection individually. Take the following example::
 
     class Author
     {
-        protected $profileData = array(
+        protected $profileData = [
             'personal_email' => '...',
             'short_bio' => '...',
-        );
+        ];
 
         public function setProfileData($key, $value)
         {
@@ -79,10 +79,10 @@ following:
              *     allowMissingFields = true
              * )
              */
-             protected $profileData = array(
+             protected $profileData = [
                  'personal_email' => '...',
                  'short_bio' => '...',
-             );
+             ];
         }
 
     .. code-block:: yaml
@@ -140,23 +140,23 @@ following:
 
         class Author
         {
-            private $options = array();
+            private $options = [];
 
             public static function loadValidatorMetadata(ClassMetadata $metadata)
             {
-                $metadata->addPropertyConstraint('profileData', new Assert\Collection(array(
-                    'fields' => array(
+                $metadata->addPropertyConstraint('profileData', new Assert\Collection([
+                    'fields' => [
                         'personal_email' => new Assert\Email(),
-                        'short_bio' => array(
+                        'short_bio' => [
                             new Assert\NotBlank(),
-                            new Assert\Length(array(
+                            new Assert\Length([
                                 'max' => 100,
                                 'maxMessage' => 'Your short bio is too long!',
-                            )),
-                        ),
-                    ),
+                            ]),
+                        ],
+                    ],
                     'allowMissingFields' => true,
-                )));
+                ]));
             }
         }
 
@@ -207,7 +207,7 @@ you can do the following:
              *     }
              * )
              */
-             protected $profileData = array('personal_email');
+             protected $profileData = ['personal_email'];
         }
 
     .. code-block:: yaml
@@ -265,18 +265,18 @@ you can do the following:
 
         class Author
         {
-            protected $profileData = array('personal_email');
+            protected $profileData = ['personal_email'];
 
             public static function loadValidatorMetadata(ClassMetadata $metadata)
             {
-                $metadata->addPropertyConstraint('profileData', new Assert\Collection(array(
-                    'fields' => array(
+                $metadata->addPropertyConstraint('profileData', new Assert\Collection([
+                    'fields' => [
                         'personal_email'  => new Assert\Required(
-                            array(new Assert\NotBlank(), new Assert\Email())
+                            [new Assert\NotBlank(), new Assert\Email()]
                         ),
                         'alternate_email' => new Assert\Optional(new Assert\Email()),
-                    ),
-                )));
+                    ],
+                ]));
             }
         }
 
diff --git a/reference/constraints/Count.rst b/reference/constraints/Count.rst
index f1e2a716935..caa9e2a4103 100644
--- a/reference/constraints/Count.rst
+++ b/reference/constraints/Count.rst
@@ -44,7 +44,7 @@ you might add the following:
              *      maxMessage = "You cannot specify more than {{ limit }} emails"
              * )
              */
-             protected $emails = array();
+             protected $emails = [];
         }
 
     .. code-block:: yaml
@@ -91,12 +91,12 @@ you might add the following:
         {
             public static function loadValidatorMetadata(ClassMetadata $metadata)
             {
-                $metadata->addPropertyConstraint('emails', new Assert\Count(array(
+                $metadata->addPropertyConstraint('emails', new Assert\Count([
                     'min'        => 1,
                     'max'        => 5,
                     'minMessage' => 'You must specify at least one email',
                     'maxMessage' => 'You cannot specify more than {{ limit }} emails',
-                )));
+                ]));
             }
         }
 
diff --git a/reference/constraints/Email.rst b/reference/constraints/Email.rst
index 66a7bac0814..bf54c0d4563 100644
--- a/reference/constraints/Email.rst
+++ b/reference/constraints/Email.rst
@@ -81,10 +81,10 @@ Basic Usage
         {
             public static function loadValidatorMetadata(ClassMetadata $metadata)
             {
-                $metadata->addPropertyConstraint('email', new Assert\Email(array(
+                $metadata->addPropertyConstraint('email', new Assert\Email([
                     'message' => 'The email "{{ value }}" is not a valid email.',
                     'checkMX' => true,
-                )));
+                ]));
             }
         }
 
diff --git a/reference/constraints/EqualTo.rst b/reference/constraints/EqualTo.rst
index 71cf6c052d7..824c57811c1 100644
--- a/reference/constraints/EqualTo.rst
+++ b/reference/constraints/EqualTo.rst
@@ -100,9 +100,9 @@ and that the ``age`` is ``20``, you could do the following:
             {
                 $metadata->addPropertyConstraint('firstName', new Assert\EqualTo('Mary'));
 
-                $metadata->addPropertyConstraint('age', new Assert\EqualTo(array(
+                $metadata->addPropertyConstraint('age', new Assert\EqualTo([
                     'value' => 20,
-                )));
+                ]));
             }
         }
 
diff --git a/reference/constraints/Expression.rst b/reference/constraints/Expression.rst
index 9e591090e92..3f105be7683 100644
--- a/reference/constraints/Expression.rst
+++ b/reference/constraints/Expression.rst
@@ -118,10 +118,10 @@ One way to accomplish this is with the Expression constraint:
         {
             public static function loadValidatorMetadata(ClassMetadata $metadata)
             {
-                $metadata->addConstraint(new Assert\Expression(array(
+                $metadata->addConstraint(new Assert\Expression([
                     'expression' => 'this.getCategory() in ["php", "symfony"] or !this.isTechnicalPost()',
                     'message' => 'If this is a tech post, the category should be either php or symfony!',
-                )));
+                ]));
             }
 
             // ...
@@ -207,10 +207,10 @@ more about the expression language syntax, see
             {
                 public static function loadValidatorMetadata(ClassMetadata $metadata)
                 {
-                    $metadata->addPropertyConstraint('isTechnicalPost', new Assert\Expression(array(
+                    $metadata->addPropertyConstraint('isTechnicalPost', new Assert\Expression([
                         'expression' => 'this.getCategory() in ["php", "symfony"] or value == false',
                         'message' => 'If this is a tech post, the category should be either php or symfony!',
-                    )));
+                    ]));
                 }
 
                 // ...
diff --git a/reference/constraints/File.rst b/reference/constraints/File.rst
index fa81991621e..8d440e3fed2 100644
--- a/reference/constraints/File.rst
+++ b/reference/constraints/File.rst
@@ -140,14 +140,14 @@ below a certain file size and a valid PDF, add the following:
         {
             public static function loadValidatorMetadata(ClassMetadata $metadata)
             {
-                $metadata->addPropertyConstraint('bioFile', new Assert\File(array(
+                $metadata->addPropertyConstraint('bioFile', new Assert\File([
                     'maxSize' => '1024k',
-                    'mimeTypes' => array(
+                    'mimeTypes' => [
                         'application/pdf',
                         'application/x-pdf',
-                    ),
+                    ],
                     'mimeTypesMessage' => 'Please upload a valid PDF',
-                )));
+                ]));
             }
         }
 
diff --git a/reference/constraints/GreaterThan.rst b/reference/constraints/GreaterThan.rst
index 0778b77b49e..ed0d9eded18 100644
--- a/reference/constraints/GreaterThan.rst
+++ b/reference/constraints/GreaterThan.rst
@@ -99,9 +99,9 @@ The following constraints ensure that:
             {
                 $metadata->addPropertyConstraint('siblings', new Assert\GreaterThan(5));
 
-                $metadata->addPropertyConstraint('age', new Assert\GreaterThan(array(
+                $metadata->addPropertyConstraint('age', new Assert\GreaterThan([
                     'value' => 18,
-                )));
+                ]));
             }
         }
 
diff --git a/reference/constraints/GreaterThanOrEqual.rst b/reference/constraints/GreaterThanOrEqual.rst
index b789a67a78f..59c46801812 100644
--- a/reference/constraints/GreaterThanOrEqual.rst
+++ b/reference/constraints/GreaterThanOrEqual.rst
@@ -97,9 +97,9 @@ The following constraints ensure that:
             {
                 $metadata->addPropertyConstraint('siblings', new Assert\GreaterThanOrEqual(5));
 
-                $metadata->addPropertyConstraint('age', new Assert\GreaterThanOrEqual(array(
+                $metadata->addPropertyConstraint('age', new Assert\GreaterThanOrEqual([
                     'value' => 18,
-                )));
+                ]));
             }
         }
 
diff --git a/reference/constraints/Iban.rst b/reference/constraints/Iban.rst
index 84b25ee425a..b4877f6c19f 100644
--- a/reference/constraints/Iban.rst
+++ b/reference/constraints/Iban.rst
@@ -84,9 +84,9 @@ will contain an International Bank Account Number.
 
             public static function loadValidatorMetadata(ClassMetadata $metadata)
             {
-                $metadata->addPropertyConstraint('bankAccountNumber', new Assert\Iban(array(
+                $metadata->addPropertyConstraint('bankAccountNumber', new Assert\Iban([
                     'message' => 'This is not a valid International Bank Account Number (IBAN).',
-                )));
+                ]));
             }
         }
 
diff --git a/reference/constraints/IdenticalTo.rst b/reference/constraints/IdenticalTo.rst
index 81d1aefcc65..3db2cd3b87c 100644
--- a/reference/constraints/IdenticalTo.rst
+++ b/reference/constraints/IdenticalTo.rst
@@ -103,9 +103,9 @@ The following constraints ensure that:
             {
                 $metadata->addPropertyConstraint('firstName', new Assert\IdenticalTo('Mary'));
 
-                $metadata->addPropertyConstraint('age', new Assert\IdenticalTo(array(
+                $metadata->addPropertyConstraint('age', new Assert\IdenticalTo([
                     'value' => 20,
-                )));
+                ]));
             }
         }
 
diff --git a/reference/constraints/Image.rst b/reference/constraints/Image.rst
index e1d1b68b610..9691f59f19c 100644
--- a/reference/constraints/Image.rst
+++ b/reference/constraints/Image.rst
@@ -142,12 +142,12 @@ that it is between a certain size, add the following:
         {
             public static function loadValidatorMetadata(ClassMetadata $metadata)
             {
-                $metadata->addPropertyConstraint('headshot', new Assert\Image(array(
+                $metadata->addPropertyConstraint('headshot', new Assert\Image([
                     'minWidth' => 200,
                     'maxWidth' => 400,
                     'minHeight' => 200,
                     'maxHeight' => 400,
-                )));
+                ]));
             }
         }
 
@@ -214,10 +214,10 @@ following code:
 
             public static function loadValidatorMetadata(ClassMetadata $metadata)
             {
-                $metadata->addPropertyConstraint('headshot', new Assert\Image(array(
+                $metadata->addPropertyConstraint('headshot', new Assert\Image([
                     'allowLandscape'    => false,
                     'allowPortrait'     => false,
-                )));
+                ]));
             }
         }
 
diff --git a/reference/constraints/IsFalse.rst b/reference/constraints/IsFalse.rst
index 093c7fd78df..9562911d2ce 100644
--- a/reference/constraints/IsFalse.rst
+++ b/reference/constraints/IsFalse.rst
@@ -28,7 +28,7 @@ you want to guarantee that some ``state`` property is *not* in a dynamic
 
     protected $state;
 
-    protected $invalidStates = array();
+    protected $invalidStates = [];
 
     public function isStateInvalid()
     {
diff --git a/reference/constraints/IsTrue.rst b/reference/constraints/IsTrue.rst
index 14dc8a05105..7f05b98e66d 100644
--- a/reference/constraints/IsTrue.rst
+++ b/reference/constraints/IsTrue.rst
@@ -103,9 +103,9 @@ Then you can constrain this method with ``IsTrue``.
 
             public static function loadValidatorMetadata(ClassMetadata $metadata)
             {
-                $metadata->addGetterConstraint('tokenValid', new IsTrue(array(
+                $metadata->addGetterConstraint('tokenValid', new IsTrue([
                     'message' => 'The token is invalid.',
-                )));
+                ]));
             }
 
             public function isTokenValid()
diff --git a/reference/constraints/Isbn.rst b/reference/constraints/Isbn.rst
index 95abc23e085..9522f209de5 100644
--- a/reference/constraints/Isbn.rst
+++ b/reference/constraints/Isbn.rst
@@ -87,10 +87,10 @@ on an object that will contain an ISBN.
 
             public static function loadValidatorMetadata(ClassMetadata $metadata)
             {
-                $metadata->addPropertyConstraint('isbn', new Assert\Isbn(array(
+                $metadata->addPropertyConstraint('isbn', new Assert\Isbn([
                     'type'    => 'isbn10',
                     'message' => 'This value is not valid.',
-                )));
+                ]));
             }
         }
 
diff --git a/reference/constraints/Length.rst b/reference/constraints/Length.rst
index 159e048e8ff..f1877ebf391 100644
--- a/reference/constraints/Length.rst
+++ b/reference/constraints/Length.rst
@@ -102,12 +102,12 @@ and "50", you might add the following:
         {
             public static function loadValidatorMetadata(ClassMetadata $metadata)
             {
-                $metadata->addPropertyConstraint('firstName', new Assert\Length(array(
+                $metadata->addPropertyConstraint('firstName', new Assert\Length([
                     'min'        => 2,
                     'max'        => 50,
                     'minMessage' => 'Your first name must be at least {{ limit }} characters long',
                     'maxMessage' => 'Your first name cannot be longer than {{ limit }} characters',
-                )));
+                ]));
             }
         }
 
diff --git a/reference/constraints/LessThan.rst b/reference/constraints/LessThan.rst
index cce8f46e2f2..08f991c2423 100644
--- a/reference/constraints/LessThan.rst
+++ b/reference/constraints/LessThan.rst
@@ -99,9 +99,9 @@ The following constraints ensure that:
             {
                 $metadata->addPropertyConstraint('siblings', new Assert\LessThan(5));
 
-                $metadata->addPropertyConstraint('age', new Assert\LessThan(array(
+                $metadata->addPropertyConstraint('age', new Assert\LessThan([
                     'value' => 80,
-                )));
+                ]));
             }
         }
 
diff --git a/reference/constraints/LessThanOrEqual.rst b/reference/constraints/LessThanOrEqual.rst
index 0d09f90289c..ad0dc025df6 100644
--- a/reference/constraints/LessThanOrEqual.rst
+++ b/reference/constraints/LessThanOrEqual.rst
@@ -97,9 +97,9 @@ The following constraints ensure that:
             {
                 $metadata->addPropertyConstraint('siblings', new Assert\LessThanOrEqual(5));
 
-                $metadata->addPropertyConstraint('age', new Assert\LessThanOrEqual(array(
+                $metadata->addPropertyConstraint('age', new Assert\LessThanOrEqual([
                     'value' => 80,
-                )));
+                ]));
             }
         }
 
diff --git a/reference/constraints/Luhn.rst b/reference/constraints/Luhn.rst
index 78e73f29926..d89c2cc7b58 100644
--- a/reference/constraints/Luhn.rst
+++ b/reference/constraints/Luhn.rst
@@ -79,9 +79,9 @@ will contain a credit card number.
 
             public static function loadValidatorMetadata(ClassMetadata $metadata)
             {
-                $metadata->addPropertyConstraint('cardNumber', new Assert\Luhn(array(
+                $metadata->addPropertyConstraint('cardNumber', new Assert\Luhn([
                     'message' => 'Please check your credit card number',
-                )));
+                ]));
             }
         }
 
diff --git a/reference/constraints/NotEqualTo.rst b/reference/constraints/NotEqualTo.rst
index 499ca0e1e8c..7a2d88cdfa7 100644
--- a/reference/constraints/NotEqualTo.rst
+++ b/reference/constraints/NotEqualTo.rst
@@ -102,9 +102,9 @@ the following:
             {
                 $metadata->addPropertyConstraint('firstName', new Assert\NotEqualTo('Mary'));
 
-                $metadata->addPropertyConstraint('age', new Assert\NotEqualTo(array(
+                $metadata->addPropertyConstraint('age', new Assert\NotEqualTo([
                     'value' => 15,
-                )));
+                ]));
             }
         }
 
diff --git a/reference/constraints/NotIdenticalTo.rst b/reference/constraints/NotIdenticalTo.rst
index b87d9aca433..bbac8b1b1d8 100644
--- a/reference/constraints/NotIdenticalTo.rst
+++ b/reference/constraints/NotIdenticalTo.rst
@@ -103,9 +103,9 @@ The following constraints ensure that:
             {
                 $metadata->addPropertyConstraint('age', new Assert\NotIdenticalTo('Mary'));
 
-                $metadata->addPropertyConstraint('age', new Assert\NotIdenticalTo(array(
+                $metadata->addPropertyConstraint('age', new Assert\NotIdenticalTo([
                     'value' => 15,
-                )));
+                ]));
             }
         }
 
diff --git a/reference/constraints/Range.rst b/reference/constraints/Range.rst
index 9ef728ec8fa..b854af61e46 100644
--- a/reference/constraints/Range.rst
+++ b/reference/constraints/Range.rst
@@ -90,12 +90,12 @@ you might add the following:
         {
             public static function loadValidatorMetadata(ClassMetadata $metadata)
             {
-                $metadata->addPropertyConstraint('height', new Assert\Range(array(
+                $metadata->addPropertyConstraint('height', new Assert\Range([
                     'min'        => 120,
                     'max'        => 180,
                     'minMessage' => 'You must be at least {{ limit }}cm tall to enter',
                     'maxMessage' => 'You cannot be taller than {{ limit }}cm to enter',
-                )));
+                ]));
             }
         }
 
@@ -167,10 +167,10 @@ date must lie within the current year like this:
         {
             public static function loadValidatorMetadata(ClassMetadata $metadata)
             {
-                $metadata->addPropertyConstraint('startDate', new Assert\Range(array(
+                $metadata->addPropertyConstraint('startDate', new Assert\Range([
                     'min' => 'first day of January',
                     'max' => 'first day of January next year',
-                )));
+                ]));
             }
         }
 
@@ -237,10 +237,10 @@ dates. If you want to fix the timezone, append it to the date string:
         {
             public static function loadValidatorMetadata(ClassMetadata $metadata)
             {
-                $metadata->addPropertyConstraint('startDate', new Assert\Range(array(
+                $metadata->addPropertyConstraint('startDate', new Assert\Range([
                     'min' => 'first day of January UTC',
                     'max' => 'first day of January next year UTC',
-                )));
+                ]));
             }
         }
 
@@ -307,10 +307,10 @@ can check that a delivery date starts within the next five hours like this:
         {
             public static function loadValidatorMetadata(ClassMetadata $metadata)
             {
-                $metadata->addPropertyConstraint('deliveryDate', new Assert\Range(array(
+                $metadata->addPropertyConstraint('deliveryDate', new Assert\Range([
                     'min' => 'now',
                     'max' => '+5 hours',
-                )));
+                ]));
             }
         }
 
diff --git a/reference/constraints/Regex.rst b/reference/constraints/Regex.rst
index ee4f114b077..a8ff93bfe4b 100644
--- a/reference/constraints/Regex.rst
+++ b/reference/constraints/Regex.rst
@@ -79,9 +79,9 @@ more word characters at the beginning of your string:
         {
             public static function loadValidatorMetadata(ClassMetadata $metadata)
             {
-                $metadata->addPropertyConstraint('description', new Assert\Regex(array(
+                $metadata->addPropertyConstraint('description', new Assert\Regex([
                     'pattern' => '/^\w+/',
-                )));
+                ]));
             }
         }
 
@@ -153,11 +153,11 @@ it a custom message:
         {
             public static function loadValidatorMetadata(ClassMetadata $metadata)
             {
-                $metadata->addPropertyConstraint('firstName', new Assert\Regex(array(
+                $metadata->addPropertyConstraint('firstName', new Assert\Regex([
                     'pattern' => '/\d/',
                     'match'   => false,
                     'message' => 'Your name cannot contain a number',
-                )));
+                ]));
             }
         }
 
@@ -253,10 +253,10 @@ need to specify the HTML5 compatible pattern in the ``htmlPattern`` option:
         {
             public static function loadValidatorMetadata(ClassMetadata $metadata)
             {
-                $metadata->addPropertyConstraint('name', new Assert\Regex(array(
+                $metadata->addPropertyConstraint('name', new Assert\Regex([
                     'pattern'     => '/^[a-z]+$/i',
                     'htmlPattern' => '^[a-zA-Z]+$',
-                )));
+                ]));
             }
         }
 
diff --git a/reference/constraints/Type.rst b/reference/constraints/Type.rst
index 5a4ec564c32..16bc72bcbc8 100644
--- a/reference/constraints/Type.rst
+++ b/reference/constraints/Type.rst
@@ -98,10 +98,10 @@ This will check if ``firstName`` is of type ``string`` and that ``age`` is an
             {
                 $metadata->addPropertyConstraint('firstName', new Assert\Type('string'));
 
-                $metadata->addPropertyConstraint('age', new Assert\Type(array(
+                $metadata->addPropertyConstraint('age', new Assert\Type([
                     'type'    => 'integer',
                     'message' => 'The value {{ value }} is not a valid {{ type }}.',
-                )));
+                ]));
             }
         }
 
diff --git a/reference/constraints/UniqueEntity.rst b/reference/constraints/UniqueEntity.rst
index 7098fcb75bf..8b1697b07d5 100644
--- a/reference/constraints/UniqueEntity.rst
+++ b/reference/constraints/UniqueEntity.rst
@@ -102,9 +102,9 @@ your user table:
         {
             public static function loadValidatorMetadata(ClassMetadata $metadata)
             {
-                $metadata->addConstraint(new UniqueEntity(array(
+                $metadata->addConstraint(new UniqueEntity([
                     'fields'  => 'email',
-                )));
+                ]));
 
                 $metadata->addPropertyConstraint('email', new Assert\Email());
             }
@@ -279,11 +279,11 @@ Consider this example:
 
             public static function loadValidatorMetadata(ClassMetadata $metadata)
             {
-                $metadata->addConstraint(new UniqueEntity(array(
-                    'fields'    => array('host', 'port'),
+                $metadata->addConstraint(new UniqueEntity([
+                    'fields'    => ['host', 'port'],
                     'errorPath' => 'port',
                     'message'   => 'This port is already in use on that host.',
-                )));
+                ]));
             }
         }
 
diff --git a/reference/constraints/Url.rst b/reference/constraints/Url.rst
index 39aa005a0eb..b3fecab262f 100644
--- a/reference/constraints/Url.rst
+++ b/reference/constraints/Url.rst
@@ -153,16 +153,16 @@ You can use the following parameters in this message:
         {
             public static function loadValidatorMetadata(ClassMetadata $metadata)
             {
-                $metadata->addPropertyConstraint('bioUrl', new Assert\Url(array(
+                $metadata->addPropertyConstraint('bioUrl', new Assert\Url([
                     'message' => 'The url "{{ value }}" is not a valid url.',
-                )));
+                ]));
             }
         }
 
 protocols
 ~~~~~~~~~
 
-**type**: ``array`` **default**: ``array('http', 'https')``
+**type**: ``array`` **default**: ``['http', 'https']``
 
 The protocols considered to be valid for the URL. For example, if you also consider
 the ``ftp://`` type URLs to be valid, redefine the ``protocols`` array, listing
@@ -228,9 +228,9 @@ the ``ftp://`` type URLs to be valid, redefine the ``protocols`` array, listing
         {
             public static function loadValidatorMetadata(ClassMetadata $metadata)
             {
-                $metadata->addPropertyConstraint('bioUrl', new Assert\Url(array(
-                    'protocols' => array('http', 'https', 'ftp'),
-                )));
+                $metadata->addPropertyConstraint('bioUrl', new Assert\Url([
+                    'protocols' => ['http', 'https', 'ftp'],
+                ]));
             }
         }
 
@@ -302,9 +302,9 @@ option to the value of any of the ``CHECK_DNS_TYPE_*`` constants in the
         {
             public static function loadValidatorMetadata(ClassMetadata $metadata)
             {
-                $metadata->addPropertyConstraint('bioUrl', new Assert\Url(array(
+                $metadata->addPropertyConstraint('bioUrl', new Assert\Url([
                     'checkDNS'  => Assert\Url::CHECK_DNS_TYPE_ANY,
-                )));
+                ]));
             }
         }
 
@@ -375,8 +375,8 @@ DNS check failed.
         {
             public static function loadValidatorMetadata(ClassMetadata $metadata)
             {
-                $metadata->addPropertyConstraint('bioUrl', new Assert\Url(array(
+                $metadata->addPropertyConstraint('bioUrl', new Assert\Url([
                      'dnsMessage' => 'The host "{{ value }}" could not be resolved.',
-                )));
+                ]));
             }
         }
diff --git a/reference/constraints/UserPassword.rst b/reference/constraints/UserPassword.rst
index 560a3f51bb8..6140cfdbc91 100644
--- a/reference/constraints/UserPassword.rst
+++ b/reference/constraints/UserPassword.rst
@@ -90,9 +90,9 @@ the user's current password:
             {
                 $metadata->addPropertyConstraint(
                     'oldPassword',
-                    new SecurityAssert\UserPassword(array(
+                    new SecurityAssert\UserPassword([
                         'message' => 'Wrong value for your current password',
-                    ))
+                    ])
                 );
             }
         }
diff --git a/reference/constraints/Valid.rst b/reference/constraints/Valid.rst
index 990b07050c5..72c4fb55792 100644
--- a/reference/constraints/Valid.rst
+++ b/reference/constraints/Valid.rst
@@ -159,7 +159,7 @@ stores an ``Address`` instance in the ``$address`` property::
             {
                 $metadata->addPropertyConstraint('street', new Assert\NotBlank());
                 $metadata->addPropertyConstraint('zipCode', new Assert\NotBlank());
-                $metadata->addPropertyConstraint('zipCode', new Assert\Length(array("max" => 5)));
+                $metadata->addPropertyConstraint('zipCode', new Assert\Length(["max" => 5]));
             }
         }
 
@@ -178,7 +178,7 @@ stores an ``Address`` instance in the ``$address`` property::
             public static function loadValidatorMetadata(ClassMetadata $metadata)
             {
                 $metadata->addPropertyConstraint('firstName', new Assert\NotBlank());
-                $metadata->addPropertyConstraint('firstName', new Assert\Length(array("min" => 4)));
+                $metadata->addPropertyConstraint('firstName', new Assert\Length(["min" => 4]));
                 $metadata->addPropertyConstraint('lastName', new Assert\NotBlank());
             }
         }
diff --git a/reference/dic_tags.rst b/reference/dic_tags.rst
index e34d682288f..082d7d4967f 100644
--- a/reference/dic_tags.rst
+++ b/reference/dic_tags.rst
@@ -172,7 +172,7 @@ Second, define a service:
 
         $container
             ->register(CustomFilter::class)
-            ->addTag('assetic.filter', array('alias' => 'my_filter'))
+            ->addTag('assetic.filter', ['alias' => 'my_filter'])
         ;
 
 Finally, apply the filter:
@@ -335,7 +335,7 @@ the generic ``app.lock`` service can be defined as follows:
         $container->register('app.sqlite_lock', SqliteLock::class)->setPublic(false);
 
         $container->register('app.lock')
-            ->addTag('auto_alias', array('format' => 'app.%database_type%_lock'));
+            ->addTag('auto_alias', ['format' => 'app.%database_type%_lock']);
 
 The ``format`` option defines the expression used to construct the name of the service
 to alias. This expression can use any container parameter (as usual,
@@ -566,7 +566,7 @@ can also register it manually:
 
         $container
             ->register(MyCustomWarmer::class)
-            ->addTag('kernel.cache_warmer', array('priority' => 0))
+            ->addTag('kernel.cache_warmer', ['priority' => 0])
         ;
 
 .. note::
@@ -676,7 +676,7 @@ channel when injecting the logger in a service.
 
         $container->register(CustomLogger::class)
             ->addArgument(new Reference('logger'))
-            ->addTag('monolog.logger', array('channel' => 'app'));
+            ->addTag('monolog.logger', ['channel' => 'app']);
 
 .. tip::
 
@@ -771,7 +771,7 @@ attribute:
 
         $container
             ->register(IntrospectionProcessor::class)
-            ->addTag('monolog.processor', array('handler' => 'firephp'))
+            ->addTag('monolog.processor', ['handler' => 'firephp'])
         ;
 
 You can also add a processor for a specific logging channel by using the
@@ -808,7 +808,7 @@ You can also add a processor for a specific logging channel by using the
 
         $container
             ->register(IntrospectionProcessor::class)
-            ->addTag('monolog.processor', array('channel' => 'security'))
+            ->addTag('monolog.processor', ['channel' => 'security'])
         ;
 
 .. note::
@@ -994,7 +994,7 @@ templates):
         use AppBundle\Templating\AppHelper;
 
         $container->register(AppHelper::class)
-            ->addTag('templating.helper', array('alias' => 'alias_name'))
+            ->addTag('templating.helper', ['alias' => 'alias_name'])
         ;
 
 .. _dic-tags-translation-loader:
@@ -1044,7 +1044,7 @@ Now, register your loader as a service and tag it with ``translation.loader``:
 
         $container
             ->register(MyCustomLoader::class)
-            ->addTag('translation.loader', array('alias' => 'bin'))
+            ->addTag('translation.loader', ['alias' => 'bin'])
         ;
 
 The ``alias`` option is required and very important: it defines the file
@@ -1138,7 +1138,7 @@ required option: ``alias``, which defines the name of the extractor::
         use AppBundle\Translation\CustomExtractor;
 
         $container->register(CustomExtractor::class)
-            ->addTag('translation.extractor', array('alias' => 'foo'));
+            ->addTag('translation.extractor', ['alias' => 'foo']);
 
 translation.dumper
 ------------------
@@ -1195,7 +1195,7 @@ This is the name that's used to determine which dumper should be used.
         use AppBundle\Translation\JsonFileDumper;
 
         $container->register(JsonFileDumper::class)
-            ->addTag('translation.dumper', array('alias' => 'json'));
+            ->addTag('translation.dumper', ['alias' => 'json']);
 
 .. seealso::
 
@@ -1330,7 +1330,7 @@ also register it manually:
 
         $container
             ->register(CustomLoader::class)
-            ->addTag('twig.loader', array('priority' => 0))
+            ->addTag('twig.loader', ['priority' => 0])
         ;
 
 .. note::
diff --git a/reference/forms/types/birthday.rst b/reference/forms/types/birthday.rst
index 056fe21ad3e..04f78c8b88b 100644
--- a/reference/forms/types/birthday.rst
+++ b/reference/forms/types/birthday.rst
@@ -77,18 +77,18 @@ If your widget option is set to ``choice``, then this field will be represented
 as a series of ``select`` boxes. When the placeholder value is a string,
 it will be used as the **blank value** of all select boxes::
 
-    $builder->add('birthdate', BirthdayType::class, array(
+    $builder->add('birthdate', BirthdayType::class, [
         'placeholder' => 'Select a value',
-    ));
+    ]);
 
 Alternatively, you can use an array that configures different placeholder
 values for the year, month and day fields::
 
-    $builder->add('birthdate', BirthdayType::class, array(
-        'placeholder' => array(
+    $builder->add('birthdate', BirthdayType::class, [
+        'placeholder' => [
             'year' => 'Year', 'month' => 'Month', 'day' => 'Day',
-        )
-    ));
+        ]
+    ]);
 
 .. include:: /reference/forms/types/options/date_format.rst.inc
 
diff --git a/reference/forms/types/button.rst b/reference/forms/types/button.rst
index f7586fc7f33..62e76989a80 100644
--- a/reference/forms/types/button.rst
+++ b/reference/forms/types/button.rst
@@ -31,7 +31,7 @@ of the form type tree (i.e. it cannot be used as a form type on its own).
 attr
 ~~~~
 
-**type**: ``array`` **default**: ``array()``
+**type**: ``array`` **default**: ``[]``
 
 If you want to add extra attributes to the HTML representation of the button,
 you can use ``attr`` option. It's an associative array with HTML attribute
@@ -40,9 +40,9 @@ as a key. This can be useful when you need to set a custom class for the button:
     use Symfony\Component\Form\Extension\Core\Type\ButtonType;
     // ...
 
-    $builder->add('save', ButtonType::class, array(
-        'attr' => array('class' => 'save'),
-    ));
+    $builder->add('save', ButtonType::class, [
+        'attr' => ['class' => 'save'],
+    ]);
 
 .. include:: /reference/forms/types/options/button_disabled.rst.inc
 
diff --git a/reference/forms/types/checkbox.rst b/reference/forms/types/checkbox.rst
index 8f87683f180..fc180ec9175 100644
--- a/reference/forms/types/checkbox.rst
+++ b/reference/forms/types/checkbox.rst
@@ -39,10 +39,10 @@ Example Usage
     use Symfony\Component\Form\Extension\Core\Type\CheckboxType;
     // ...
 
-    $builder->add('public', CheckboxType::class, array(
+    $builder->add('public', CheckboxType::class, [
         'label'    => 'Show this entry publicly?',
         'required' => false,
-    ));
+    ]);
 
 Field Options
 -------------
diff --git a/reference/forms/types/choice.rst b/reference/forms/types/choice.rst
index 032d7425572..b26b6b1ab52 100644
--- a/reference/forms/types/choice.rst
+++ b/reference/forms/types/choice.rst
@@ -58,13 +58,13 @@ the ``choices`` option::
     use Symfony\Component\Form\Extension\Core\Type\ChoiceType;
     // ...
 
-    $builder->add('isAttending', ChoiceType::class, array(
-        'choices'  => array(
+    $builder->add('isAttending', ChoiceType::class, [
+        'choices'  => [
             'Maybe' => null,
             'Yes' => true,
             'No' => false,
-        ),
-    ));
+        ],
+    ]);
 
 This will create a ``select`` drop-down like this:
 
@@ -135,18 +135,18 @@ by passing a multi-dimensional ``choices`` array::
     use Symfony\Component\Form\Extension\Core\Type\ChoiceType;
     // ...
 
-    $builder->add('stockStatus', ChoiceType::class, array(
-        'choices' => array(
-            'Main Statuses' => array(
+    $builder->add('stockStatus', ChoiceType::class, [
+        'choices' => [
+            'Main Statuses' => [
                 'Yes' => 'stock_yes',
                 'No' => 'stock_no',
-            ),
-            'Out of Stock Statuses' => array(
+            ],
+            'Out of Stock Statuses' => [
                 'Backordered' => 'stock_backordered',
                 'Discontinued' => 'stock_discontinued',
-            ),
-        ),
-    ));
+            ],
+        ],
+    ]);
 
 .. image:: /_images/reference/form/choice-example4.png
    :align: center
@@ -159,7 +159,7 @@ Field Options
 choices
 ~~~~~~~
 
-**type**: ``array`` **default**: ``array()``
+**type**: ``array`` **default**: ``[]``
 
 This is the most basic way to specify the choices that should be used
 by this field. The ``choices`` option is an array, where the array key
@@ -168,9 +168,9 @@ is the item's label and the array value is the item's value::
     use Symfony\Component\Form\Extension\Core\Type\ChoiceType;
     // ...
 
-    $builder->add('inStock', ChoiceType::class, array(
-        'choices' => array('In Stock' => true, 'Out of Stock' => false),
-    ));
+    $builder->add('inStock', ChoiceType::class, [
+        'choices' => ['In Stock' => true, 'Out of Stock' => false],
+    ]);
 
 If there are choice values that are not scalar or the stringified
 representation is not unique Symfony will use incrementing integers
@@ -204,11 +204,11 @@ if you want to take advantage of lazy loading::
     use Symfony\Component\Form\Extension\Core\Type\ChoiceType;
     // ...
 
-    $builder->add('constants', ChoiceType::class, array(
+    $builder->add('constants', ChoiceType::class, [
         'choice_loader' => new CallbackChoiceLoader(function() {
             return StaticClass::getConstants();
         }),
-    ));
+    ]);
 
 This will cause the call of ``StaticClass::getConstants()`` to not happen if the
 request is redirected and if there is no pre set or submitted data. Otherwise
@@ -254,7 +254,7 @@ The actual default value of this option depends on other field options:
 
 * If ``multiple`` is ``false`` and ``expanded`` is ``false``, then ``''``
   (empty string);
-* Otherwise ``array()`` (empty array).
+* Otherwise ``[]`` (empty array).
 
 .. include:: /reference/forms/types/options/empty_data.rst.inc
     :start-after: DEFAULT_PLACEHOLDER
diff --git a/reference/forms/types/collection.rst b/reference/forms/types/collection.rst
index 51d2357486f..71865153f57 100644
--- a/reference/forms/types/collection.rst
+++ b/reference/forms/types/collection.rst
@@ -57,14 +57,14 @@ address as its own input text box::
     use Symfony\Component\Form\Extension\Core\Type\EmailType;
     // ...
 
-    $builder->add('emails', CollectionType::class, array(
+    $builder->add('emails', CollectionType::class, [
         // each entry in the array will be an "email" field
         'entry_type' => EmailType::class,
         // these options are passed to each "email" type
-        'entry_options' => array(
-            'attr' => array('class' => 'email-box'),
-        ),
-    ));
+        'entry_options' => [
+            'attr' => ['class' => 'email-box'],
+        ],
+    ]);
 
 The simplest way to render this is all at once:
 
@@ -278,12 +278,12 @@ the value is removed from the collection. For example::
     use Symfony\Component\Form\Extension\Core\Type\CollectionType;
     // ...
 
-    $builder->add('users', CollectionType::class, array(
+    $builder->add('users', CollectionType::class, [
         // ...
         'delete_empty' => function (User $user = null) {
             return null === $user || empty($user->getFirstName());
         },
-    ));
+    ]);
 
 Using a callable is particularly useful in case of compound form types, which
 may define complex conditions for considering them empty.
@@ -296,7 +296,7 @@ may define complex conditions for considering them empty.
 entry_options
 ~~~~~~~~~~~~~
 
-**type**: ``array`` **default**: ``array()``
+**type**: ``array`` **default**: ``[]``
 
 This is the array that's passed to the form type specified in the `entry_type`_
 option. For example, if you used the :doc:`ChoiceType </reference/forms/types/choice>`
@@ -308,17 +308,17 @@ type::
     use Symfony\Component\Form\Extension\Core\Type\ChoiceType;
     // ...
 
-    $builder->add('favorite_cities', CollectionType::class, array(
+    $builder->add('favorite_cities', CollectionType::class, [
         'entry_type'   => ChoiceType::class,
-        'entry_options'  => array(
-            'choices'  => array(
+        'entry_options'  => [
+            'choices'  => [
                 'Nashville' => 'nashville',
                 'Paris'     => 'paris',
                 'Berlin'    => 'berlin',
                 'London'    => 'london',
-            ),
-        ),
-    ));
+            ],
+        ],
+    ]);
 
 entry_type
 ~~~~~~~~~~
@@ -379,12 +379,12 @@ for all entries with the `entry_options`_ option will be used.
     use Symfony\Component\Form\Extension\Core\Type\TextType;
     // ...
 
-    $builder->add('tags', CollectionType::class, array(
+    $builder->add('tags', CollectionType::class, [
         'entry_type' => TextType::class,
         'allow_add' => true,
         'prototype' => true,
         'prototype_data' => 'New Tag Placeholder',
-    ));
+    ]);
 
 prototype_name
 ~~~~~~~~~~~~~~
@@ -408,7 +408,7 @@ Not all options are listed here - only the most applicable to this type:
 .. include:: /reference/forms/types/options/empty_data.rst.inc
     :end-before: DEFAULT_PLACEHOLDER
 
-The default value is ``array()`` (empty array).
+The default value is ``[]`` (empty array).
 
 .. include:: /reference/forms/types/options/empty_data.rst.inc
     :start-after: DEFAULT_PLACEHOLDER
diff --git a/reference/forms/types/country.rst b/reference/forms/types/country.rst
index cb4a11afabc..85c07cb27c7 100644
--- a/reference/forms/types/country.rst
+++ b/reference/forms/types/country.rst
@@ -99,7 +99,7 @@ The actual default value of this option depends on other field options:
 
 * If ``multiple`` is ``false`` and ``expanded`` is ``false``, then ``''``
   (empty string);
-* Otherwise ``array()`` (empty array).
+* Otherwise ``[]`` (empty array).
 
 .. include:: /reference/forms/types/options/empty_data.rst.inc
     :start-after: DEFAULT_PLACEHOLDER
diff --git a/reference/forms/types/currency.rst b/reference/forms/types/currency.rst
index bbe9a4fb01c..249003551d6 100644
--- a/reference/forms/types/currency.rst
+++ b/reference/forms/types/currency.rst
@@ -88,7 +88,7 @@ The actual default value of this option depends on other field options:
 
 * If ``multiple`` is ``false`` and ``expanded`` is ``false``, then ``''``
   (empty string);
-* Otherwise ``array()`` (empty array).
+* Otherwise ``[]`` (empty array).
 
 .. include:: /reference/forms/types/options/empty_data.rst.inc
     :start-after: DEFAULT_PLACEHOLDER
diff --git a/reference/forms/types/date.rst b/reference/forms/types/date.rst
index feca602bac1..373c5e7b7b6 100644
--- a/reference/forms/types/date.rst
+++ b/reference/forms/types/date.rst
@@ -58,9 +58,9 @@ field as **three different choice fields**::
     use Symfony\Component\Form\Extension\Core\Type\DateType;
     // ...
 
-    $builder->add('publishedAt', DateType::class, array(
+    $builder->add('publishedAt', DateType::class, [
         'widget' => 'choice',
-    ));
+    ]);
 
 If your underlying date is *not* a ``DateTime`` object (e.g. it's a unix timestamp),
 configure the `input`_ option.
@@ -75,10 +75,10 @@ use the ``single_text`` widget::
     use Symfony\Component\Form\Extension\Core\Type\DateType;
     // ...
 
-    $builder->add('publishedAt', DateType::class, array(
+    $builder->add('publishedAt', DateType::class, [
         // renders it as a single text box
         'widget' => 'single_text',
-    ));
+    ]);
 
 This will render as an ``input type="date"`` HTML5 field, which means that **some -
 but not all - browsers will add nice date picker functionality to the field**. If you
@@ -91,7 +91,7 @@ make the following changes::
     use Symfony\Component\Form\Extension\Core\Type\DateType;
     // ...
 
-    $builder->add('publishedAt', DateType::class, array(
+    $builder->add('publishedAt', DateType::class, [
         'widget' => 'single_text',
 
         // prevents rendering it as type="date", to avoid HTML5 date pickers
@@ -99,7 +99,7 @@ make the following changes::
 
         // adds a class that can be selected in JavaScript
         'attr' => ['class' => 'js-datepicker'],
-    ));
+    ]);
 
 Then, add the following JavaScript code in your template to initialize the date
 picker:
@@ -143,18 +143,18 @@ If your widget option is set to ``choice``, then this field will be represented
 as a series of ``select`` boxes. When the placeholder value is a string,
 it will be used as the **blank value** of all select boxes::
 
-    $builder->add('dueDate', DateType::class, array(
+    $builder->add('dueDate', DateType::class, [
         'placeholder' => 'Select a value',
-    ));
+    ]);
 
 Alternatively, you can use an array that configures different placeholder
 values for the year, month and day fields::
 
-    $builder->add('dueDate', DateType::class, array(
-        'placeholder' => array(
+    $builder->add('dueDate', DateType::class, [
+        'placeholder' => [
             'year' => 'Year', 'month' => 'Month', 'day' => 'Day',
-        )
-    ));
+        ]
+    ]);
 
 .. _reference-forms-type-date-format:
 
diff --git a/reference/forms/types/dateinterval.rst b/reference/forms/types/dateinterval.rst
index 89602f24796..d37874e8f43 100644
--- a/reference/forms/types/dateinterval.rst
+++ b/reference/forms/types/dateinterval.rst
@@ -62,7 +62,7 @@ options are `input`_ and `widget`_.
 You can configure *a lot* of different options, including exactly *which* range
 options to show (e.g. don't show "months", but *do* show "days")::
 
-    $builder->add('remindEvery', DateIntervalType::class, array(
+    $builder->add('remindEvery', DateIntervalType::class, [
         'widget'      => 'integer', // render a text field for each part
         // 'input'    => 'string',  // if you want the field to return a ISO 8601 string back to you
 
@@ -71,7 +71,7 @@ options to show (e.g. don't show "months", but *do* show "days")::
         'with_months' => false,
         'with_days'   => true,
         'with_hours'  => true,
-    ));
+    ]);
 
 Field Options
 -------------
@@ -95,15 +95,15 @@ If your widget option is set to ``choice``, then this field will be represented
 as a series of ``select`` boxes. The ``placeholder`` option can be used to
 add a "blank" entry to the top of each select box::
 
-    $builder->add('remindEvery', DateIntervalType::class, array(
+    $builder->add('remindEvery', DateIntervalType::class, [
         'placeholder' => '',
-    ));
+    ]);
 
 Alternatively, you can specify a string to be displayed for the "blank" value::
 
-    $builder->add('remindEvery', DateIntervalType::class, array(
-        'placeholder' => array('years' => 'Years', 'months' => 'Months', 'days' => 'Days')
-    ));
+    $builder->add('remindEvery', DateIntervalType::class, [
+        'placeholder' => ['years' => 'Years', 'months' => 'Months', 'days' => 'Days']
+    ]);
 
 hours
 ~~~~~
@@ -125,7 +125,7 @@ your underlying object. Valid values are:
 
 * ``string`` (a string formatted with `ISO 8601`_ standard, e.g. ``P7Y6M5DT12H15M30S``)
 * ``dateinterval`` (a ``DateInterval`` object)
-* ``array`` (e.g. ``array('days' => '1', 'hours' => '12',)``)
+* ``array`` (e.g. ``['days' => '1', 'hours' => '12',]``)
 
 The value that comes back from the form will also be normalized back into
 this format.
@@ -143,7 +143,7 @@ The labels displayed for each of the elements of this type. The default values
 are ``null``, so they display the "humanized version" of the child names (``Invert``,
 ``Years``, etc.)::
 
-    'labels' => array(
+    'labels' => [
         'invert' => null,
         'years' => null,
         'months' => null,
@@ -151,7 +151,7 @@ are ``null``, so they display the "humanized version" of the child names (``Inve
         'hours' => null,
         'minutes' => null,
         'seconds' => null,
-    )
+    ]
 
 minutes
 ~~~~~~~
diff --git a/reference/forms/types/datetime.rst b/reference/forms/types/datetime.rst
index 2ba9eba96e9..3d400ba66cb 100644
--- a/reference/forms/types/datetime.rst
+++ b/reference/forms/types/datetime.rst
@@ -84,21 +84,21 @@ it will be used as the **blank value** of all select boxes::
 
     use Symfony\Component\Form\Extension\Core\Type\DateTimeType;
 
-    $builder->add('startDateTime', DateTimeType::class, array(
+    $builder->add('startDateTime', DateTimeType::class, [
         'placeholder' => 'Select a value',
-    ));
+    ]);
 
 Alternatively, you can use an array that configures different placeholder
 values for the year, month, day, hour, minute and second fields::
 
     use Symfony\Component\Form\Extension\Core\Type\DateTimeType;
 
-    $builder->add('startDateTime', DateTimeType::class, array(
-        'placeholder' => array(
+    $builder->add('startDateTime', DateTimeType::class, [
+        'placeholder' => [
             'year' => 'Year', 'month' => 'Month', 'day' => 'Day',
             'hour' => 'Hour', 'minute' => 'Minute', 'second' => 'Second',
-        )
-    ));
+        ]
+    ]);
 
 format
 ~~~~~~
@@ -126,7 +126,7 @@ on your underlying object. Valid values are:
 
 * ``string`` (e.g. ``2011-06-05 12:15:00``)
 * ``datetime`` (a ``DateTime`` object)
-* ``array`` (e.g. ``array(2011, 06, 05, 12, 15, 0)``)
+* ``array`` (e.g. ``[2011, 06, 05, 12, 15, 0]``)
 * ``timestamp`` (e.g. ``1307276100``)
 
 The value that comes back from the form will also be normalized back into
diff --git a/reference/forms/types/entity.rst b/reference/forms/types/entity.rst
index 95c7f287a2a..20c33be7af2 100644
--- a/reference/forms/types/entity.rst
+++ b/reference/forms/types/entity.rst
@@ -61,7 +61,7 @@ be listed inside the choice field::
     use Symfony\Bridge\Doctrine\Form\Type\EntityType;
     // ...
 
-    $builder->add('users', EntityType::class, array(
+    $builder->add('users', EntityType::class, [
         // looks for choices from this entity
         'class' => 'AppBundle:User',
 
@@ -71,7 +71,7 @@ be listed inside the choice field::
         // used to render a select box, check boxes or radios
         // 'multiple' => true,
         // 'expanded' => true,
-    ));
+    ]);
 
 This will build a ``select`` drop-down containing *all* of the ``User`` objects
 in the database. To render radio buttons or checkboxes instead, change the
@@ -90,14 +90,14 @@ the `query_builder`_ option::
     use Symfony\Bridge\Doctrine\Form\Type\EntityType;
     // ...
 
-    $builder->add('users', EntityType::class, array(
+    $builder->add('users', EntityType::class, [
         'class' => 'AppBundle:User',
         'query_builder' => function (EntityRepository $er) {
             return $er->createQueryBuilder('u')
                 ->orderBy('u.username', 'ASC');
         },
         'choice_label' => 'username',
-    ));
+    ]);
 
 .. _reference-forms-entity-choices:
 
@@ -114,10 +114,10 @@ then you can supply the ``choices`` option directly::
     use Symfony\Bridge\Doctrine\Form\Type\EntityType;
     // ...
 
-    $builder->add('users', EntityType::class, array(
+    $builder->add('users', EntityType::class, [
         'class' => 'AppBundle:User',
         'choices' => $group->getUsers(),
-    ));
+    ]);
 
 .. include:: /reference/forms/types/options/select_how_rendered.rst.inc
 
@@ -135,10 +135,10 @@ the HTML element::
     use Symfony\Bridge\Doctrine\Form\Type\EntityType;
     // ...
 
-    $builder->add('category', EntityType::class, array(
+    $builder->add('category', EntityType::class, [
         'class' => 'AppBundle:Category',
         'choice_label' => 'displayName',
-    ));
+    ]);
 
 If left blank, the entity object will be cast to a string and so must have a ``__toString()``
 method. You can also pass a callback function for more control::
@@ -146,12 +146,12 @@ method. You can also pass a callback function for more control::
     use Symfony\Bridge\Doctrine\Form\Type\EntityType;
     // ...
 
-    $builder->add('category', EntityType::class, array(
+    $builder->add('category', EntityType::class, [
         'class' => 'AppBundle:Category',
         'choice_label' => function ($category) {
             return $category->getDisplayName();
         }
-    ));
+    ]);
 
 The method is called for each entity in the list and passed to the function. For
 more details, see the main :ref:`choice_label <reference-form-choice-label>` documentation.
@@ -168,10 +168,10 @@ more details, see the main :ref:`choice_label <reference-form-choice-label>` doc
         use Symfony\Bridge\Doctrine\Form\Type\EntityType;
         // ...
 
-        $builder->add('genre', EntityType::class, array(
+        $builder->add('genre', EntityType::class, [
            'class' => 'MyBundle:Genre',
            'choice_label' => 'translations[en].name',
-        ));
+        ]);
 
 class
 ~~~~~
@@ -270,7 +270,7 @@ These options inherit from the :doc:`ChoiceType </reference/forms/types/choice>`
 preferred_choices
 ~~~~~~~~~~~~~~~~~
 
-**type**: ``array`` or ``callable`` **default**: ``array()``
+**type**: ``array`` or ``callable`` **default**: ``[]``
 
 This option allows you to move certain choices to the top of your list with a visual
 separator between them and the rest of the options. This option expects an array
@@ -280,11 +280,11 @@ of entity objects::
     use Symfony\Bridge\Doctrine\Form\Type\EntityType;
     // ...
 
-    $builder->add('users', EntityType::class, array(
+    $builder->add('users', EntityType::class, [
         'class' => User::class,
         // this method must return an array of User entities
         'preferred_choices' => $group->getPreferredUsers(),
-    ));
+    ]);
 
 The preferred choices are only meaningful when rendering a ``select`` element
 (i.e. ``expanded`` false). The preferred choices and normal choices are separated
@@ -313,7 +313,7 @@ The actual default value of this option depends on other field options:
 
 * If ``multiple`` is ``false`` and ``expanded`` is ``false``, then ``''``
   (empty string);
-* Otherwise ``array()`` (empty array).
+* Otherwise ``[]`` (empty array).
 
 .. include:: /reference/forms/types/options/empty_data.rst.inc
     :start-after: DEFAULT_PLACEHOLDER
diff --git a/reference/forms/types/form.rst b/reference/forms/types/form.rst
index 648420384e7..b03732aadc4 100644
--- a/reference/forms/types/form.rst
+++ b/reference/forms/types/form.rst
@@ -85,7 +85,7 @@ The actual default value of this option depends on other field options:
 
 * If ``data_class`` is set and ``required`` is ``true``, then ``new $data_class()``;
 * If ``data_class`` is set and ``required`` is ``false``, then ``null``;
-* If ``data_class`` is not set and ``compound`` is ``true``, then ``array()``
+* If ``data_class`` is not set and ``compound`` is ``true``, then ``[]``
   (empty array);
 * If ``data_class`` is not set and ``compound`` is ``false``, then ``''``
   (empty string).
diff --git a/reference/forms/types/language.rst b/reference/forms/types/language.rst
index 11269c6ce2a..2a60be33e9e 100644
--- a/reference/forms/types/language.rst
+++ b/reference/forms/types/language.rst
@@ -101,7 +101,7 @@ The actual default value of this option depends on other field options:
 
 * If ``multiple`` is ``false`` and ``expanded`` is ``false``, then ``''``
   (empty string);
-* Otherwise ``array()`` (empty array).
+* Otherwise ``[]`` (empty array).
 
 .. include:: /reference/forms/types/options/empty_data.rst.inc
     :start-after: DEFAULT_PLACEHOLDER
diff --git a/reference/forms/types/locale.rst b/reference/forms/types/locale.rst
index 8f1a0a56936..99998ec4104 100644
--- a/reference/forms/types/locale.rst
+++ b/reference/forms/types/locale.rst
@@ -102,7 +102,7 @@ The actual default value of this option depends on other field options:
 
 * If ``multiple`` is ``false`` and ``expanded`` is ``false``, then ``''``
   (empty string);
-* Otherwise ``array()`` (empty array).
+* Otherwise ``[]`` (empty array).
 
 .. include:: /reference/forms/types/options/empty_data.rst.inc
     :start-after: DEFAULT_PLACEHOLDER
diff --git a/reference/forms/types/money.rst b/reference/forms/types/money.rst
index 3f6af5941ef..5b706654fbb 100644
--- a/reference/forms/types/money.rst
+++ b/reference/forms/types/money.rst
@@ -68,9 +68,9 @@ For example::
     use Symfony\Component\Form\Extension\Core\Type\MoneyType;
     // ...
 
-    $builder->add('price', MoneyType::class, array(
+    $builder->add('price', MoneyType::class, [
         'divisor' => 100,
-    ));
+    ]);
 
 In this case, if the ``price`` field is set to ``9900``, then the value
 ``99`` will actually be rendered to the user. When the user submits the
diff --git a/reference/forms/types/options/attr.rst.inc b/reference/forms/types/options/attr.rst.inc
index 46238ac023b..d7ecc7e46dd 100644
--- a/reference/forms/types/options/attr.rst.inc
+++ b/reference/forms/types/options/attr.rst.inc
@@ -1,12 +1,12 @@
 attr
 ~~~~
 
-**type**: ``array`` **default**: ``array()``
+**type**: ``array`` **default**: ``[]``
 
 If you want to add extra attributes to an HTML field representation
 you can use the ``attr`` option. It's an associative array with HTML attributes
 as keys. This can be useful when you need to set a custom class for some widget::
 
-    $builder->add('body', TextareaType::class, array(
-        'attr' => array('class' => 'tinymce'),
-    ));
+    $builder->add('body', TextareaType::class, [
+        'attr' => ['class' => 'tinymce'],
+    ]);
diff --git a/reference/forms/types/options/button_label.rst.inc b/reference/forms/types/options/button_label.rst.inc
index 9af1a0fcbcb..28ec3d7edd1 100644
--- a/reference/forms/types/options/button_label.rst.inc
+++ b/reference/forms/types/options/button_label.rst.inc
@@ -14,4 +14,4 @@ be directly set inside the template:
 
     .. code-block:: html+php
 
-        <?= $view['form']->widget($form['save'], array('label' => 'Click me')) ?>
+        <?= $view['form']->widget($form['save'], ['label' => 'Click me']) ?>
diff --git a/reference/forms/types/options/by_reference.rst.inc b/reference/forms/types/options/by_reference.rst.inc
index b1c855c28fc..c3921c58a72 100644
--- a/reference/forms/types/options/by_reference.rst.inc
+++ b/reference/forms/types/options/by_reference.rst.inc
@@ -19,7 +19,7 @@ To explain this further, here's a simple example::
     $builder
         ->add('title', TextType::class)
         ->add(
-            $builder->create('author', FormType::class, array('by_reference' => ?))
+            $builder->create('author', FormType::class, ['by_reference' => ?])
                 ->add('name', TextType::class)
                 ->add('email', EmailType::class)
         )
diff --git a/reference/forms/types/options/choice_attr.rst.inc b/reference/forms/types/options/choice_attr.rst.inc
index e185ae1c763..87c467f7773 100644
--- a/reference/forms/types/options/choice_attr.rst.inc
+++ b/reference/forms/types/options/choice_attr.rst.inc
@@ -1,7 +1,7 @@
 choice_attr
 ~~~~~~~~~~~
 
-**type**: ``array``, ``callable`` or ``string`` **default**: ``array()``
+**type**: ``array``, ``callable`` or ``string`` **default**: ``[]``
 
 Use this to add additional HTML attributes to each choice. This can be
 an associative array where the keys match the choice keys and the values
@@ -13,14 +13,14 @@ If an array, the keys of the ``choices`` array must be used as keys::
     use Symfony\Component\Form\Extension\Core\Type\ChoiceType;
     // ...
 
-    $builder->add('attending', ChoiceType::class, array(
-        'choices' => array(
+    $builder->add('attending', ChoiceType::class, [
+        'choices' => [
             'Yes' => true,
             'No' => false,
             'Maybe' => null,
-        ),
+        ],
         'choice_attr' => function($choiceValue, $key, $value) {
             // adds a class like attending_yes, attending_no, etc
             return ['class' => 'attending_'.strtolower($key)];
         },
-    ));
+    ]);
diff --git a/reference/forms/types/options/choice_label.rst.inc b/reference/forms/types/options/choice_label.rst.inc
index bc71a87ea5f..8935757b7e0 100644
--- a/reference/forms/types/options/choice_label.rst.inc
+++ b/reference/forms/types/options/choice_label.rst.inc
@@ -10,12 +10,12 @@ more control::
     use Symfony\Component\Form\Extension\Core\Type\ChoiceType;
     // ...
 
-    $builder->add('attending', ChoiceType::class, array(
-        'choices' => array(
+    $builder->add('attending', ChoiceType::class, [
+        'choices' => [
             'yes' => true,
             'no' => false,
             'maybe' => null,
-        ),
+        ],
         'choice_label' => function ($choiceValue, $key, $value) {
             if ($value == $choiceValue) {
                 return 'Definitely!';
@@ -26,7 +26,7 @@ more control::
             // or if you want to translate some key
             //return 'form.choice.'.$key;
         },
-    ));
+    ]);
 
 This method is called for *each* choice, passing you the choice ``$value`` and the
 ``$key`` from the choices array (``$index`` is related to `choice_value`_). This
@@ -42,14 +42,14 @@ If your choice values are objects, then ``choice_label`` can also be a
     use Symfony\Component\Form\Extension\Core\Type\ChoiceType;
     // ...
 
-    $builder->add('attending', ChoiceType::class, array(
-        'choices' => array(
+    $builder->add('attending', ChoiceType::class, [
+        'choices' => [
             new Status(Status::YES),
             new Status(Status::NO),
             new Status(Status::MAYBE),
-        ),
+        ],
         'choice_label' => 'displayName',
-    ));
+    ]);
 
 If set to ``false``, all the tag labels will be discarded for radio or checkbox
 inputs. You can also return ``false`` from the callable to discard certain labels.
diff --git a/reference/forms/types/options/data.rst.inc b/reference/forms/types/options/data.rst.inc
index 70f3f73365c..9698ff822a6 100644
--- a/reference/forms/types/options/data.rst.inc
+++ b/reference/forms/types/options/data.rst.inc
@@ -12,9 +12,9 @@ an individual field, you can set it in the data option::
     use Symfony\Component\Form\Extension\Core\Type\HiddenType;
     // ...
 
-    $builder->add('token', HiddenType::class, array(
+    $builder->add('token', HiddenType::class, [
         'data' => 'abcdef',
-    ));
+    ]);
 
 .. caution::
 
diff --git a/reference/forms/types/options/data_class.rst.inc b/reference/forms/types/options/data_class.rst.inc
index 3808032e489..10d6b478210 100644
--- a/reference/forms/types/options/data_class.rst.inc
+++ b/reference/forms/types/options/data_class.rst.inc
@@ -10,6 +10,6 @@ form, so you can use it for any form field type which requires an object::
     use AppBundle\Form\MediaType;
     // ...
 
-    $builder->add('media', MediaType::class, array(
+    $builder->add('media', MediaType::class, [
         'data_class' => Media::class,
-    ));
+    ]);
diff --git a/reference/forms/types/options/date_format.rst.inc b/reference/forms/types/options/date_format.rst.inc
index b1ac8498240..961a8ef63ae 100644
--- a/reference/forms/types/options/date_format.rst.inc
+++ b/reference/forms/types/options/date_format.rst.inc
@@ -16,11 +16,11 @@ For more information on valid formats, see `Date/Time Format Syntax`_::
     use Symfony\Component\Form\Extension\Core\Type\DateType;
     // ...
 
-    $builder->add('date_created', DateType::class, array(
+    $builder->add('date_created', DateType::class, [
         'widget' => 'single_text',
         // this is actually the default format for single_text
         'format' => 'yyyy-MM-dd',
-    ));
+    ]);
 
 .. note::
 
diff --git a/reference/forms/types/options/date_input.rst.inc b/reference/forms/types/options/date_input.rst.inc
index e1078d88b6b..4de4643677c 100644
--- a/reference/forms/types/options/date_input.rst.inc
+++ b/reference/forms/types/options/date_input.rst.inc
@@ -8,7 +8,7 @@ on your underlying object. Valid values are:
 
 * ``string`` (e.g. ``2011-06-05``)
 * ``datetime`` (a ``DateTime`` object)
-* ``array`` (e.g. ``array('year' => 2011, 'month' => 06, 'day' => 05)``)
+* ``array`` (e.g. ``['year' => 2011, 'month' => 06, 'day' => 05]``)
 * ``timestamp`` (e.g. ``1307232000``)
 
 The value that comes back from the form will also be normalized back into
diff --git a/reference/forms/types/options/empty_data.rst.inc b/reference/forms/types/options/empty_data.rst.inc
index bec4fdc3cd5..e3df385a3f9 100644
--- a/reference/forms/types/options/empty_data.rst.inc
+++ b/reference/forms/types/options/empty_data.rst.inc
@@ -17,10 +17,10 @@ This means it helps you handling form submission with blank fields. For
 example, if you want the ``name`` field to be explicitly set to ``John Doe``
 when no value is selected, you can do it like this::
 
-    $builder->add('name', null, array(
+    $builder->add('name', null, [
         'required'   => false,
         'empty_data' => 'John Doe',
-    ));
+    ]);
 
 This will still render an empty text box, but upon submission the ``John Doe``
 value will be set. Use the ``data`` or ``placeholder`` options to show this
diff --git a/reference/forms/types/options/error_mapping.rst.inc b/reference/forms/types/options/error_mapping.rst.inc
index dd45aa9c3e1..ce50f2f1126 100644
--- a/reference/forms/types/options/error_mapping.rst.inc
+++ b/reference/forms/types/options/error_mapping.rst.inc
@@ -1,7 +1,7 @@
 error_mapping
 ~~~~~~~~~~~~~
 
-**type**: ``array`` **default**: ``array()``
+**type**: ``array`` **default**: ``[]``
 
 This option allows you to modify the target of a validation error.
 
@@ -15,11 +15,11 @@ field so that it displays above it::
 
     public function configureOptions(OptionsResolver $resolver)
     {
-        $resolver->setDefaults(array(
-            'error_mapping' => array(
+        $resolver->setDefaults([
+            'error_mapping' => [
                 'matchingCityAndZipCode' => 'city',
-            ),
-        ));
+            ],
+        ]);
     }
 
 Here are the rules for the left and the right side of the mapping:
@@ -38,8 +38,8 @@ parent form. You can use the dot (``.``) on the left side to map errors of all
 unmapped properties to a particular field. For instance, to map all these
 errors to the ``city`` field, use::
 
-    $resolver->setDefaults(array(
-        'error_mapping' => array(
+    $resolver->setDefaults([
+        'error_mapping' => [
             '.' => 'city',
-        ),
-    ));
+        ],
+    ]);
diff --git a/reference/forms/types/options/group_by.rst.inc b/reference/forms/types/options/group_by.rst.inc
index 15061135aa9..563ebbfee03 100644
--- a/reference/forms/types/options/group_by.rst.inc
+++ b/reference/forms/types/options/group_by.rst.inc
@@ -15,13 +15,13 @@ Take the following example::
     use Symfony\Component\Form\Extension\Core\Type\ChoiceType;
     // ...
 
-    $builder->add('publishAt', ChoiceType::class, array(
-        'choices' => array(
+    $builder->add('publishAt', ChoiceType::class, [
+        'choices' => [
             'now' => new \DateTime('now'),
             'tomorrow' => new \DateTime('+1 day'),
             '1 week' => new \DateTime('+1 week'),
             '1 month' => new \DateTime('+1 month'),
-        ),
+        ],
         'group_by' => function($choiceValue, $key, $value) {
             if ($choiceValue <= new \DateTime('+3 days')) {
                 return 'Soon';
@@ -29,7 +29,7 @@ Take the following example::
                 return 'Later';
             }
         },
-    ));
+    ]);
 
 This groups the dates that are within 3 days into "Soon" and everything else into
 a "Later" ``<optgroup>``:
diff --git a/reference/forms/types/options/invalid_message_parameters.rst.inc b/reference/forms/types/options/invalid_message_parameters.rst.inc
index b877f04bb72..aadc9817428 100644
--- a/reference/forms/types/options/invalid_message_parameters.rst.inc
+++ b/reference/forms/types/options/invalid_message_parameters.rst.inc
@@ -1,14 +1,14 @@
 invalid_message_parameters
 ~~~~~~~~~~~~~~~~~~~~~~~~~~
 
-**type**: ``array`` **default**: ``array()``
+**type**: ``array`` **default**: ``[]``
 
 When setting the ``invalid_message`` option, you may need to
 include some variables in the string. This can be done by adding placeholders
 to that option and including the variables in this option::
 
-    $builder->add('some_field', SomeFormType::class, array(
+    $builder->add('some_field', SomeFormType::class, [
         // ...
         'invalid_message' => 'You entered an invalid value, it should include %num% letters',
-        'invalid_message_parameters' => array('%num%' => 6),
-    ));
+        'invalid_message_parameters' => ['%num%' => 6],
+    ]);
diff --git a/reference/forms/types/options/label_attr.rst.inc b/reference/forms/types/options/label_attr.rst.inc
index 6817483dcbd..48e0dfa9191 100644
--- a/reference/forms/types/options/label_attr.rst.inc
+++ b/reference/forms/types/options/label_attr.rst.inc
@@ -1,7 +1,7 @@
 label_attr
 ~~~~~~~~~~
 
-**type**: ``array`` **default**: ``array()``
+**type**: ``array`` **default**: ``[]``
 
 Sets the HTML attributes for the ``<label>`` element, which will be used
 when rendering the label for the field. It's an associative array with HTML
@@ -21,5 +21,5 @@ template:
         echo $view['form']->label(
             $form['name'],
             'Your name',
-            array('label_attr' => array('class' => 'CUSTOM_LABEL_CLASS'))
+            ['label_attr' => ['class' => 'CUSTOM_LABEL_CLASS']]
         );
diff --git a/reference/forms/types/options/label_format.rst.inc b/reference/forms/types/options/label_format.rst.inc
index be16617d267..6636a80a825 100644
--- a/reference/forms/types/options/label_format.rst.inc
+++ b/reference/forms/types/options/label_format.rst.inc
@@ -14,13 +14,13 @@ to a field. To avoid duplicated keyword messages, you can configure the label
 format to a static value, like::
 
     // ...
-    $profileFormBuilder->add('address', AddressType::class, array(
+    $profileFormBuilder->add('address', AddressType::class, [
         'label_format' => 'form.address.%name%',
-    ));
+    ]);
 
-    $invoiceFormBuilder->add('invoice', AddressType::class, array(
+    $invoiceFormBuilder->add('invoice', AddressType::class, [
         'label_format' => 'form.address.%name%',
-    ));
+    ]);
 
 This option is inherited by the child types. With the code above, the label of
 the ``street`` field of both forms will use the ``form.address.street`` keyword
diff --git a/reference/forms/types/options/placeholder.rst.inc b/reference/forms/types/options/placeholder.rst.inc
index a486db35639..b5b13f06844 100644
--- a/reference/forms/types/options/placeholder.rst.inc
+++ b/reference/forms/types/options/placeholder.rst.inc
@@ -12,18 +12,18 @@ applies if the ``multiple`` option is set to false.
     use Symfony\Component\Form\Extension\Core\Type\ChoiceType;
     // ...
 
-    $builder->add('states', ChoiceType::class, array(
+    $builder->add('states', ChoiceType::class, [
         'placeholder' => 'Choose an option',
-    ));
+    ]);
 
 * Guarantee that no "empty" value option is displayed::
 
     use Symfony\Component\Form\Extension\Core\Type\ChoiceType;
     // ...
 
-    $builder->add('states', ChoiceType::class, array(
+    $builder->add('states', ChoiceType::class, [
         'placeholder' => false,
-    ));
+    ]);
 
 If you leave the ``placeholder`` option unset, then a blank (with no text)
 option will automatically be added if and only if the ``required`` option
@@ -33,6 +33,6 @@ is false::
     // ...
 
     // a blank (with no text) option will be added
-    $builder->add('states', ChoiceType::class, array(
+    $builder->add('states', ChoiceType::class, [
         'required' => false,
-    ));
+    ]);
diff --git a/reference/forms/types/options/preferred_choices.rst.inc b/reference/forms/types/options/preferred_choices.rst.inc
index 17f60889e9e..2bba5366921 100644
--- a/reference/forms/types/options/preferred_choices.rst.inc
+++ b/reference/forms/types/options/preferred_choices.rst.inc
@@ -1,7 +1,7 @@
 preferred_choices
 ~~~~~~~~~~~~~~~~~
 
-**type**: ``array``, ``callable`` or ``string`` **default**: ``array()``
+**type**: ``array``, ``callable`` or ``string`` **default**: ``[]``
 
 This option allows you to move certain choices to the top of your list with a visual
 separator between them and the rest of the options. If you have a form of languages,
@@ -10,15 +10,15 @@ you can list the most popular on top, like Bork Bork and Pirate::
     use Symfony\Component\Form\Extension\Core\Type\ChoiceType;
     // ...
 
-    $builder->add('language', ChoiceType::class, array(
-        'choices' => array(
+    $builder->add('language', ChoiceType::class, [
+        'choices' => [
             'English' => 'en',
             'Spanish' => 'es',
             'Bork'   => 'muppets',
             'Pirate' => 'arr',
-        ),
-        'preferred_choices' => array('muppets', 'arr'),
-    ));
+        ],
+        'preferred_choices' => ['muppets', 'arr'],
+    ]);
 
 This options can also be a callback function to give you more flexibility. This might
 be especially useful if your values are objects::
@@ -26,18 +26,18 @@ be especially useful if your values are objects::
     use Symfony\Component\Form\Extension\Core\Type\ChoiceType;
     // ...
 
-    $builder->add('publishAt', ChoiceType::class, array(
-        'choices' => array(
+    $builder->add('publishAt', ChoiceType::class, [
+        'choices' => [
             'now' => new \DateTime('now'),
             'tomorrow' => new \DateTime('+1 day'),
             '1 week' => new \DateTime('+1 week'),
             '1 month' => new \DateTime('+1 month'),
-        ),
+        ],
         'preferred_choices' => function ($value, $key) {
             // prefer options within 3 days
             return $value <= new \DateTime('+3 days');
         },
-    ));
+    ]);
 
 This will "prefer" the "now" and "tomorrow" choices only:
 
@@ -60,6 +60,6 @@ when rendering the field:
 
     .. code-block:: php
 
-        <?= $view['form']->widget($form['publishAt'], array(
+        <?= $view['form']->widget($form['publishAt'], [
                   'separator' => '====='
-        )) ?>
+        ]) ?>
diff --git a/reference/forms/types/options/validation_groups.rst.inc b/reference/forms/types/options/validation_groups.rst.inc
index b184c12d069..7dc2d1ca208 100644
--- a/reference/forms/types/options/validation_groups.rst.inc
+++ b/reference/forms/types/options/validation_groups.rst.inc
@@ -13,14 +13,14 @@ validator as they are::
 
     public function configureOptions(OptionsResolver $resolver)
     {
-        $resolver->setDefaults(array(
+        $resolver->setDefaults([
             'validation_groups' => 'Registration',
-        ));
+        ]);
     }
 
 This is equivalent to passing the group as array::
 
-    'validation_groups' => array('Registration'),
+    'validation_groups' => ['Registration'],
 
 The form's data will be :doc:`validated against all given groups </form/validation_groups>`.
 
@@ -33,13 +33,13 @@ the option. Symfony will then pass the form when calling it::
     // ...
     public function configureOptions(OptionsResolver $resolver)
     {
-        $resolver->setDefaults(array(
+        $resolver->setDefaults([
             'validation_groups' => function (FormInterface $form) {
                 $entity = $form->getData();
 
-                return $entity->isUser() ? array('User') : array('Company');
+                return $entity->isUser() ? ['User'] : ['Company'];
             },
-        ));
+        ]);
     }
 
 .. seealso::
diff --git a/reference/forms/types/range.rst b/reference/forms/types/range.rst
index a59082adb78..94bb57dea3c 100644
--- a/reference/forms/types/range.rst
+++ b/reference/forms/types/range.rst
@@ -35,12 +35,12 @@ Basic Usage
     use Symfony\Component\Form\Extension\Core\Type\RangeType;
     // ...
 
-    $builder->add('name', RangeType::class, array(
-        'attr' => array(
+    $builder->add('name', RangeType::class, [
+        'attr' => [
             'min' => 5,
             'max' => 50
-        )
-    ));
+        ]
+    ]);
 
 Inherited Options
 -----------------
diff --git a/reference/forms/types/repeated.rst b/reference/forms/types/repeated.rst
index 17e2c52e994..63d99cff9a9 100644
--- a/reference/forms/types/repeated.rst
+++ b/reference/forms/types/repeated.rst
@@ -42,14 +42,14 @@ Example Usage
     use Symfony\Component\Form\Extension\Core\Type\PasswordType;
     // ...
 
-    $builder->add('password', RepeatedType::class, array(
+    $builder->add('password', RepeatedType::class, [
         'type' => PasswordType::class,
         'invalid_message' => 'The password fields must match.',
-        'options' => array('attr' => array('class' => 'password-field')),
+        'options' => ['attr' => ['class' => 'password-field']],
         'required' => true,
-        'first_options'  => array('label' => 'Password'),
-        'second_options' => array('label' => 'Repeat Password'),
-    ));
+        'first_options'  => ['label' => 'Password'],
+        'second_options' => ['label' => 'Repeat Password'],
+    ]);
 
 Upon a successful form submit, the value entered into both of the "password"
 fields becomes the data of the ``password`` key. In other words, even though
@@ -115,7 +115,7 @@ name is used to "guess" the label for you.
 first_options
 ~~~~~~~~~~~~~
 
-**type**: ``array`` **default**: ``array()``
+**type**: ``array`` **default**: ``[]``
 
 Additional options (will be merged into `options`_ below) that should be
 passed *only* to the first field. This is especially useful for customizing
@@ -124,15 +124,15 @@ the label::
     use Symfony\Component\Form\Extension\Core\Type\RepeatedType;
     // ...
 
-    $builder->add('password', RepeatedType::class, array(
-        'first_options'  => array('label' => 'Password'),
-        'second_options' => array('label' => 'Repeat Password'),
-    ));
+    $builder->add('password', RepeatedType::class, [
+        'first_options'  => ['label' => 'Password'],
+        'second_options' => ['label' => 'Repeat Password'],
+    ]);
 
 options
 ~~~~~~~
 
-**type**: ``array`` **default**: ``array()``
+**type**: ``array`` **default**: ``[]``
 
 This options array will be passed to each of the two underlying fields.
 In other words, these are the options that customize the individual field
@@ -150,7 +150,7 @@ The same as ``first_name``, but for the second field.
 second_options
 ~~~~~~~~~~~~~~
 
-**type**: ``array`` **default**: ``array()``
+**type**: ``array`` **default**: ``[]``
 
 Additional options (will be merged into `options`_ above) that should be
 passed *only* to the second field. This is especially useful for customizing
diff --git a/reference/forms/types/reset.rst b/reference/forms/types/reset.rst
index cc60101d752..4e5053957ef 100644
--- a/reference/forms/types/reset.rst
+++ b/reference/forms/types/reset.rst
@@ -25,7 +25,7 @@ Inherited Options
 attr
 ~~~~
 
-**type**: ``array`` **default**: ``array()``
+**type**: ``array`` **default**: ``[]``
 
 If you want to add extra attributes to the HTML representation of the button,
 you can use ``attr`` option. It's an associative array with HTML attribute
@@ -34,9 +34,9 @@ as a key. This can be useful when you need to set a custom class for the button:
     use Symfony\Component\Form\Extension\Core\Type\ResetType;
     // ...
 
-    $builder->add('save', ResetType::class, array(
-        'attr' => array('class' => 'save'),
-    ));
+    $builder->add('save', ResetType::class, [
+        'attr' => ['class' => 'save'],
+    ]);
 
 .. include:: /reference/forms/types/options/button_disabled.rst.inc
 
diff --git a/reference/forms/types/submit.rst b/reference/forms/types/submit.rst
index 747413f11ba..488224d2309 100644
--- a/reference/forms/types/submit.rst
+++ b/reference/forms/types/submit.rst
@@ -36,7 +36,7 @@ Inherited Options
 attr
 ~~~~
 
-**type**: ``array`` **default**: ``array()``
+**type**: ``array`` **default**: ``[]``
 
 If you want to add extra attributes to the HTML representation of the button,
 you can use ``attr`` option. It's an associative array with HTML attribute
@@ -45,9 +45,9 @@ as a key. This can be useful when you need to set a custom class for the button:
     use Symfony\Component\Form\Extension\Core\Type\SubmitType;
     // ...
 
-    $builder->add('save', SubmitType::class, array(
-        'attr' => array('class' => 'save'),
-    ));
+    $builder->add('save', SubmitType::class, [
+        'attr' => ['class' => 'save'],
+    ]);
 
 .. include:: /reference/forms/types/options/button_disabled.rst.inc
 
@@ -70,12 +70,12 @@ form wizard with buttons to go to the previous or the next step::
     // ...
 
     $form = $this->createFormBuilder($user)
-        ->add('previousStep', SubmitType::class, array(
+        ->add('previousStep', SubmitType::class, [
             'validation_groups' => false,
-        ))
-        ->add('nextStep', SubmitType::class, array(
-            'validation_groups' => array('Registration'),
-        ))
+        ])
+        ->add('nextStep', SubmitType::class, [
+            'validation_groups' => ['Registration'],
+        ])
         ->getForm();
 
 The special ``false`` ensures that no validation is performed when the previous
diff --git a/reference/forms/types/time.rst b/reference/forms/types/time.rst
index a2c539e26bd..9636dc30ba0 100644
--- a/reference/forms/types/time.rst
+++ b/reference/forms/types/time.rst
@@ -59,10 +59,10 @@ field as two different choice fields::
     use Symfony\Component\Form\Extension\Core\Type\TimeType;
     // ...
 
-    $builder->add('startTime', TimeType::class, array(
+    $builder->add('startTime', TimeType::class, [
         'input'  => 'datetime',
         'widget' => 'choice',
-    ));
+    ]);
 
 The ``input`` option *must* be changed to match the type of the underlying
 date data. For example, if the ``startTime`` field's data were a unix timestamp,
@@ -71,10 +71,10 @@ you'd need to set ``input`` to ``timestamp``::
     use Symfony\Component\Form\Extension\Core\Type\TimeType;
     // ...
 
-    $builder->add('startTime', TimeType::class, array(
+    $builder->add('startTime', TimeType::class, [
         'input'  => 'timestamp',
         'widget' => 'choice',
-    ));
+    ]);
 
 The field also supports an ``array`` and ``string`` as valid ``input`` option
 values.
@@ -93,18 +93,18 @@ If your widget option is set to ``choice``, then this field will be represented
 as a series of ``select`` boxes. When the placeholder value is a string,
 it will be used as the **blank value** of all select boxes::
 
-    $builder->add('startTime', 'time', array(
+    $builder->add('startTime', 'time', [
         'placeholder' => 'Select a value',
-    ));
+    ]);
 
 Alternatively, you can use an array that configures different placeholder
 values for the hour, minute and second fields::
 
-    $builder->add('startTime', 'time', array(
-        'placeholder' => array(
+    $builder->add('startTime', 'time', [
+        'placeholder' => [
             'hour' => 'Hour', 'minute' => 'Minute', 'second' => 'Second',
-        )
-    ));
+        ]
+    ]);
 
 .. include:: /reference/forms/types/options/hours.rst.inc
 
@@ -120,7 +120,7 @@ on your underlying object. Valid values are:
 
 * ``string`` (e.g. ``12:17:26``)
 * ``datetime`` (a ``DateTime`` object)
-* ``array`` (e.g. ``array('hour' => 12, 'minute' => 17, 'second' => 26)``)
+* ``array`` (e.g. ``['hour' => 12, 'minute' => 17, 'second' => 26]``)
 * ``timestamp`` (e.g. ``1307232000``)
 
 The value that comes back from the form will also be normalized back into
diff --git a/reference/forms/types/timezone.rst b/reference/forms/types/timezone.rst
index 5c7ff822553..7faba6a26d1 100644
--- a/reference/forms/types/timezone.rst
+++ b/reference/forms/types/timezone.rst
@@ -115,7 +115,7 @@ The actual default value of this option depends on other field options:
 
 * If ``multiple`` is ``false`` and ``expanded`` is ``false``, then ``''``
   (empty string);
-* Otherwise ``array()`` (empty array).
+* Otherwise ``[]`` (empty array).
 
 .. include:: /reference/forms/types/options/empty_data.rst.inc
     :start-after: DEFAULT_PLACEHOLDER
diff --git a/routing.rst b/routing.rst
index 91e8b325938..f1febba9fc5 100644
--- a/routing.rst
+++ b/routing.rst
@@ -104,12 +104,12 @@ The route is simple:
         use Symfony\Component\Routing\Route;
 
         $routes = new RouteCollection();
-        $routes->add('blog_list', new Route('/blog', array(
+        $routes->add('blog_list', new Route('/blog', [
             '_controller' => 'AppBundle:Blog:list',
-        )));
-        $routes->add('blog_show', new Route('/blog/{slug}', array(
+        ]));
+        $routes->add('blog_show', new Route('/blog/{slug}', [
             '_controller' => 'AppBundle:Blog:show',
-        )));
+        ]));
 
         return $routes;
 
@@ -231,11 +231,11 @@ To fix this, add a *requirement* that the ``{page}`` wildcard can *only* match n
         use Symfony\Component\Routing\Route;
 
         $routes = new RouteCollection();
-        $routes->add('blog_list', new Route('/blog/{page}', array(
+        $routes->add('blog_list', new Route('/blog/{page}', [
             '_controller' => 'AppBundle:Blog:list',
-        ), array(
+        ], [
             'page' => '\d+'
-        )));
+        ]));
 
         // ...
 
@@ -325,13 +325,13 @@ So how can you make ``blog_list`` once again match when the user visits
         $routes = new RouteCollection();
         $routes->add('blog_list', new Route(
             '/blog/{page}',
-            array(
+            [
                 '_controller' => 'AppBundle:Blog:list',
                 'page'        => 1,
-            ),
-            array(
+            ],
+            [
                 'page' => '\d+'
-            )
+            ]
         ));
 
         // ...
@@ -418,14 +418,14 @@ With all of this in mind, check out this advanced example:
         $routes = new RouteCollection();
         $routes->add(
             'article_show',
-            new Route('/articles/{_locale}/{year}/{slug}.{_format}', array(
+            new Route('/articles/{_locale}/{year}/{slug}.{_format}', [
                 '_controller' => 'AppBundle:Article:show',
                 '_format'     => 'html',
-            ), array(
+            ], [
                 '_locale' => 'en|fr',
                 '_format' => 'html|rss',
                 'year'    => '\d+',
-            ))
+            ])
         );
 
         return $routes;
@@ -652,7 +652,7 @@ route. With this information, any URL can easily be generated::
             // /blog/my-blog-post
             $url = $this->generateUrl(
                 'blog_show',
-                array('slug' => 'my-blog-post')
+                ['slug' => 'my-blog-post']
             );
         }
     }
@@ -665,7 +665,7 @@ route. With this information, any URL can easily be generated::
 
         $url = $this->container->get('router')->generate(
             'blog_show',
-            array('slug' => 'my-blog-post')
+            ['slug' => 'my-blog-post']
         );
 
 .. index::
@@ -677,10 +677,10 @@ Generating URLs with Query Strings
 The ``generate()`` method takes an array of wildcard values to generate the URI.
 But if you pass extra ones, they will be added to the URI as a query string::
 
-    $this->get('router')->generate('blog', array(
+    $this->get('router')->generate('blog', [
         'page' => 2,
         'category' => 'Symfony',
-    ));
+    ]);
     // /blog/2?category=Symfony
 
 Generating URLs from a Template
@@ -701,7 +701,7 @@ method::
 
     use Symfony\Component\Routing\Generator\UrlGeneratorInterface;
 
-    $this->generateUrl('blog_show', array('slug' => 'my-blog-post'), UrlGeneratorInterface::ABSOLUTE_URL);
+    $this->generateUrl('blog_show', ['slug' => 'my-blog-post'], UrlGeneratorInterface::ABSOLUTE_URL);
     // http://www.example.com/blog/my-blog-post
 
 .. note::
@@ -739,7 +739,7 @@ are *not* passing a ``slug`` value (which is required, because it has a ``{slug}
 wildcard in the route path. To fix this, pass a ``slug`` value when generating the
 route::
 
-    $this->generateUrl('blog_show', array('slug' => 'slug-value'));
+    $this->generateUrl('blog_show', ['slug' => 'slug-value']);
 
     // or, in Twig
     // {{ path('blog_show', {'slug': 'slug-value'}) }}
diff --git a/routing/conditions.rst b/routing/conditions.rst
index 09c494aecdb..d8e3672b38b 100644
--- a/routing/conditions.rst
+++ b/routing/conditions.rst
@@ -64,14 +64,14 @@ define arbitrary matching logic, use the ``conditions`` routing option:
 
         $routes = new RouteCollection();
         $routes->add('contact', new Route(
-            '/contact', array(
+            '/contact', [
                 '_controller' => 'AcmeDemoBundle:Main:contact',
-            ),
-            array(),
-            array(),
+            ],
+            [],
+            [],
             '',
-            array(),
-            array(),
+            [],
+            [],
             'context.getMethod() in ["GET", "HEAD"] and request.headers.get("User-Agent") matches "/firefox/i"'
         ));
 
@@ -102,7 +102,7 @@ variables that are passed into the expression:
     would generate the following PHP in the cache directory::
 
         if (rtrim($pathInfo, '/contact') === '' && (
-            in_array($context->getMethod(), array(0 => "GET", 1 => "HEAD"))
+            in_array($context->getMethod(), [0 => "GET", 1 => "HEAD"])
             && preg_match("/firefox/i", $request->headers->get("User-Agent"))
         )) {
             // ...
diff --git a/routing/custom_route_loader.rst b/routing/custom_route_loader.rst
index 00634835b67..b2620762f89 100644
--- a/routing/custom_route_loader.rst
+++ b/routing/custom_route_loader.rst
@@ -148,12 +148,12 @@ you do. The resource name itself is not actually used in the example::
 
             // prepare a new route
             $path = '/extra/{parameter}';
-            $defaults = array(
+            $defaults = [
                 '_controller' => 'AppBundle:Extra:extra',
-            );
-            $requirements = array(
+            ];
+            $requirements = [
                 'parameter' => '\d+',
-            );
+            ];
             $route = new Route($path, $defaults, $requirements);
 
             // add the new route to the route collection
diff --git a/routing/extra_information.rst b/routing/extra_information.rst
index 89b935785b6..80c5bb5e548 100644
--- a/routing/extra_information.rst
+++ b/routing/extra_information.rst
@@ -44,11 +44,11 @@ to your controller, and as attributes of the ``Request`` object:
         use Symfony\Component\Routing\Route;
 
         $routes = new RouteCollection();
-        $routes->add('blog', new Route('/blog/{page}', array(
+        $routes->add('blog', new Route('/blog/{page}', [
             '_controller' => 'AppBundle:Blog:index',
             'page'        => 1,
             'title'       => 'Hello world!',
-        )));
+        ]));
 
         return $routes;
 
diff --git a/routing/hostname_pattern.rst b/routing/hostname_pattern.rst
index c8c6d0c4bdc..678378bde83 100644
--- a/routing/hostname_pattern.rst
+++ b/routing/hostname_pattern.rst
@@ -69,13 +69,13 @@ You can also match on the HTTP *host* of the incoming request.
         use Symfony\Component\Routing\Route;
 
         $routes = new RouteCollection();
-        $routes->add('mobile_homepage', new Route('/', array(
+        $routes->add('mobile_homepage', new Route('/', [
             '_controller' => 'AppBundle:Main:mobileHomepage',
-        ), array(), array(), 'm.example.com'));
+        ], [], [], 'm.example.com'));
 
-        $routes->add('homepage', new Route('/', array(
+        $routes->add('homepage', new Route('/', [
             '_controller' => 'AppBundle:Main:homepage',
-        )));
+        ]));
 
         return $routes;
 
@@ -151,13 +151,13 @@ you can use placeholders in your hostname:
         use Symfony\Component\Routing\Route;
 
         $routes = new RouteCollection();
-        $routes->add('project_homepage', new Route('/', array(
+        $routes->add('project_homepage', new Route('/', [
             '_controller' => 'AppBundle:Main:projectsHomepage',
-        ), array(), array(), '{project_name}.example.com'));
+        ], [], [], '{project_name}.example.com'));
 
-        $routes->add('homepage', new Route('/', array(
+        $routes->add('homepage', new Route('/', [
             '_controller' => 'AppBundle:Main:homepage',
-        )));
+        ]));
 
         return $routes;
 
@@ -240,16 +240,16 @@ instance, if you want to match both ``m.example.com`` and
         use Symfony\Component\Routing\Route;
 
         $routes = new RouteCollection();
-        $routes->add('mobile_homepage', new Route('/', array(
+        $routes->add('mobile_homepage', new Route('/', [
             '_controller' => 'AppBundle:Main:mobileHomepage',
             'subdomain'   => 'm',
-        ), array(
+        ], [
             'subdomain' => 'm|mobile',
-        ), array(), '{subdomain}.example.com'));
+        ], [], '{subdomain}.example.com'));
 
-        $routes->add('homepage', new Route('/', array(
+        $routes->add('homepage', new Route('/', [
             '_controller' => 'AppBundle:Main:homepage',
-        )));
+        ]));
 
         return $routes;
 
@@ -333,16 +333,16 @@ instance, if you want to match both ``m.example.com`` and
             use Symfony\Component\Routing\Route;
 
             $routes = new RouteCollection();
-            $routes->add('mobile_homepage', new Route('/', array(
+            $routes->add('mobile_homepage', new Route('/', [
                 '_controller' => 'AppBundle:Main:mobileHomepage',
                 'domain' => '%domain%',
-            ), array(
+            ], [
                 'domain' => '%domain%',
-            ), array(), 'm.{domain}'));
+            ], [], 'm.{domain}'));
 
-            $routes->add('homepage', new Route('/', array(
+            $routes->add('homepage', new Route('/', [
                 '_controller' => 'AppBundle:Main:homepage',
-            )));
+            ]));
 
             return $routes;
 
@@ -413,7 +413,7 @@ past url matching in your functional tests::
     $crawler = $client->request(
         'GET',
         '/homepage',
-        array(),
-        array(),
-        array('HTTP_HOST' => 'm.' . $client->getContainer()->getParameter('domain'))
+        [],
+        [],
+        ['HTTP_HOST' => 'm.' . $client->getContainer()->getParameter('domain')]
     );
diff --git a/routing/optional_placeholders.rst b/routing/optional_placeholders.rst
index 94941206a34..5fa7a81d31c 100644
--- a/routing/optional_placeholders.rst
+++ b/routing/optional_placeholders.rst
@@ -55,9 +55,9 @@ the available blog posts for this imaginary blog application:
         use Symfony\Component\Routing\Route;
 
         $routes = new RouteCollection();
-        $routes->add('blog', new Route('/blog', array(
+        $routes->add('blog', new Route('/blog', [
             '_controller' => 'AppBundle:Blog:index',
-        )));
+        ]));
 
         return $routes;
 
@@ -110,9 +110,9 @@ entries? Update the route to have a new ``{page}`` placeholder:
         use Symfony\Component\Routing\Route;
 
         $routes = new RouteCollection();
-        $routes->add('blog', new Route('/blog/{page}', array(
+        $routes->add('blog', new Route('/blog/{page}', [
             '_controller' => 'AppBundle:Blog:index',
-        )));
+        ]));
 
         return $routes;
 
@@ -171,10 +171,10 @@ This is done by including it in the ``defaults`` collection:
         use Symfony\Component\Routing\Route;
 
         $routes = new RouteCollection();
-        $routes->add('blog', new Route('/blog/{page}', array(
+        $routes->add('blog', new Route('/blog/{page}', [
             '_controller' => 'AppBundle:Blog:index',
             'page'        => 1,
-        )));
+        ]));
 
         return $routes;
 
diff --git a/routing/redirect_in_config.rst b/routing/redirect_in_config.rst
index 6d7cf01fd49..07a46605de2 100644
--- a/routing/redirect_in_config.rst
+++ b/routing/redirect_in_config.rst
@@ -78,11 +78,11 @@ action to redirect to this new url:
         $routes->addCollection($appRoutes);
 
         // redirecting the root
-        $routes->add('root', new Route('/', array(
+        $routes->add('root', new Route('/', [
             '_controller' => 'FrameworkBundle:Redirect:urlRedirect',
             'path'        => '/app',
             'permanent'   => true,
-        )));
+        ]));
 
         return $routes;
 
@@ -145,11 +145,11 @@ action:
         // ...
 
         // redirecting the root
-        $routes->add('root', new Route('/wp-admin', array(
+        $routes->add('root', new Route('/wp-admin', [
             '_controller' => 'FrameworkBundle:Redirect:redirect',
             'route'       => 'sonata_admin_dashboard',
             'permanent'   => true,
-        )));
+        ]));
 
         return $routes;
 
diff --git a/routing/redirect_trailing_slash.rst b/routing/redirect_trailing_slash.rst
index 402b676b6f3..0a84b1f1b9b 100644
--- a/routing/redirect_trailing_slash.rst
+++ b/routing/redirect_trailing_slash.rst
@@ -88,12 +88,12 @@ system, as explained below:
             'remove_trailing_slash',
             new Route(
                 '/{url}',
-                array(
+                [
                     '_controller' => 'AppBundle:Redirecting:removeTrailingSlash',
-                ),
-                array(
+                ],
+                [
                     'url' => '.*/$',
-                )
+                ]
             )
         );
 
diff --git a/routing/requirements.rst b/routing/requirements.rst
index 7ba02876492..614d2c95066 100644
--- a/routing/requirements.rst
+++ b/routing/requirements.rst
@@ -62,11 +62,11 @@ a routing ``{wildcard}`` to only match some regular expression:
         use Symfony\Component\Routing\Route;
 
         $routes = new RouteCollection();
-        $routes->add('blog_list', new Route('/blog/{page}', array(
+        $routes->add('blog_list', new Route('/blog/{page}', [
             '_controller' => 'AppBundle:Blog:list',
-        ), array(
+        ], [
             'page' => '\d+',
-        )));
+        ]));
 
         // ...
 
@@ -138,12 +138,12 @@ URL:
         use Symfony\Component\Routing\Route;
 
         $routes = new RouteCollection();
-        $routes->add('homepage', new Route('/{_locale}', array(
+        $routes->add('homepage', new Route('/{_locale}', [
             '_controller' => 'AppBundle:Main:homepage',
             '_locale'     => 'en',
-        ), array(
+        ], [
             '_locale' => 'en|fr',
-        )));
+        ]));
 
         return $routes;
 
@@ -257,13 +257,13 @@ accomplished with the following route configuration:
         use Symfony\Component\Routing\Route;
 
         $routes = new RouteCollection();
-        $routes->add('api_post_show', new Route('/api/posts/{id}', array(
+        $routes->add('api_post_show', new Route('/api/posts/{id}', [
             '_controller' => 'AppBundle:BlogApi:show',
-        ), array(), array(), '', array(), array('GET', 'HEAD')));
+        ], [], [], '', [], ['GET', 'HEAD']));
 
-        $routes->add('api_post_edit', new Route('/api/posts/{id}', array(
+        $routes->add('api_post_edit', new Route('/api/posts/{id}', [
             '_controller' => 'AppBundle:BlogApi:edit',
-        ), array(), array(), '', array(), array('PUT')));
+        ], [], [], '', [], ['PUT']));
 
         return $routes;
 
diff --git a/routing/scheme.rst b/routing/scheme.rst
index b3ceba6cdad..3145112780a 100644
--- a/routing/scheme.rst
+++ b/routing/scheme.rst
@@ -58,9 +58,9 @@ the URI scheme via schemes:
         use Symfony\Component\Routing\Route;
 
         $routes = new RouteCollection();
-        $routes->add('secure', new Route('/secure', array(
+        $routes->add('secure', new Route('/secure', [
             '_controller' => 'AppBundle:Main:secure',
-        ), array(), array(), '', array('https')));
+        ], [], [], '', ['https']));
 
         return $routes;
 
diff --git a/routing/service_container_parameters.rst b/routing/service_container_parameters.rst
index a3561e7ae19..982676ee853 100644
--- a/routing/service_container_parameters.rst
+++ b/routing/service_container_parameters.rst
@@ -47,11 +47,11 @@ inside your routing configuration:
         use Symfony\Component\Routing\Route;
 
         $routes = new RouteCollection();
-        $routes->add('contact', new Route('/{_locale}/contact', array(
+        $routes->add('contact', new Route('/{_locale}/contact', [
             '_controller' => 'AppBundle:Main:contact',
-        ), array(
+        ], [
             '_locale' => '%app.locales%',
-        )));
+        ]));
 
         return $routes;
 
@@ -118,9 +118,9 @@ path):
         use Symfony\Component\Routing\Route;
 
         $routes = new RouteCollection();
-        $routes->add('some_route', new Route('/%app.route_prefix%/contact', array(
+        $routes->add('some_route', new Route('/%app.route_prefix%/contact', [
             '_controller' => 'AppBundle:Main:contact',
-        )));
+        ]));
 
         return $routes;
 
diff --git a/routing/slash_in_parameter.rst b/routing/slash_in_parameter.rst
index e55fb786879..220c38e0083 100644
--- a/routing/slash_in_parameter.rst
+++ b/routing/slash_in_parameter.rst
@@ -67,11 +67,11 @@ a more permissive regular expression for it:
         use Symfony\Component\Routing\Route;
 
         $routes = new RouteCollection();
-        $routes->add('share', new Route('/share/{token}', array(
+        $routes->add('share', new Route('/share/{token}', [
             '_controller' => 'AppBundle:Default:share',
-        ), array(
+        ], [
             'token' => '.+',
-        )));
+        ]));
 
         return $routes;
 
diff --git a/security.rst b/security.rst
index e0139765119..09ec5fca3ac 100644
--- a/security.rst
+++ b/security.rst
@@ -84,22 +84,22 @@ configuration looks like this:
     .. code-block:: php
 
         // app/config/security.php
-        $container->loadFromExtension('security', array(
-            'providers' => array(
-                'in_memory' => array(
+        $container->loadFromExtension('security', [
+            'providers' => [
+                'in_memory' => [
                     'memory' => null,
-                ),
-            ),
-            'firewalls' => array(
-                'dev' => array(
+                ],
+            ],
+            'firewalls' => [
+                'dev' => [
                     'pattern'   => '^/(_(profiler|wdt)|css|images|js)/',
                     'security'  => false,
-                ),
-                'main' => array(
+                ],
+                'main' => [
                     'anonymous' => null,
-                ),
-            ),
-        ));
+                ],
+            ],
+        ]);
 
 The ``firewalls`` key is the *heart* of your security configuration. The
 ``dev`` firewall isn't important, it just makes sure that Symfony's development
@@ -176,16 +176,16 @@ To activate this, add the ``http_basic`` key under your firewall:
     .. code-block:: php
 
         // app/config/security.php
-        $container->loadFromExtension('security', array(
+        $container->loadFromExtension('security', [
             // ...
-            'firewalls' => array(
+            'firewalls' => [
                 // ...
-                'main' => array(
+                'main' => [
                     'anonymous'  => null,
                     'http_basic' => null,
-                ),
-            ),
-        ));
+                ],
+            ],
+        ]);
 
 Simple! To try this, you need to require the user to be logged in to see
 a page. To make things interesting, create a new page at ``/admin``. For
@@ -253,19 +253,19 @@ user to be logged in to access this URL:
     .. code-block:: php
 
         // app/config/security.php
-        $container->loadFromExtension('security', array(
+        $container->loadFromExtension('security', [
             // ...
-            'firewalls' => array(
+            'firewalls' => [
                 // ...
-                'main' => array(
+                'main' => [
                     // ...
-                ),
-            ),
-           'access_control' => array(
+                ],
+            ],
+           'access_control' => [
                // require ROLE_ADMIN for /admin*
-                array('path' => '^/admin', 'roles' => 'ROLE_ADMIN'),
-            ),
-        ));
+                ['path' => '^/admin', 'roles' => 'ROLE_ADMIN'],
+           ],
+        ]);
 
 .. note::
 
@@ -350,25 +350,25 @@ provider, but it's better to think of it as an "in configuration" provider:
     .. code-block:: php
 
         // app/config/security.php
-        $container->loadFromExtension('security', array(
-            'providers' => array(
-                'in_memory' => array(
-                    'memory' => array(
-                        'users' => array(
-                            'ryan' => array(
+        $container->loadFromExtension('security', [
+            'providers' => [
+                'in_memory' => [
+                    'memory' => [
+                        'users' => [
+                            'ryan' => [
                                 'password' => 'ryanpass',
                                 'roles' => 'ROLE_USER',
-                            ),
-                            'admin' => array(
+                            ],
+                            'admin' => [
                                 'password' => 'kitten',
                                 'roles' => 'ROLE_ADMIN',
-                            ),
-                        ),
-                    ),
-                ),
-            ),
+                            ],
+                        ],
+                    ],
+                ],
+            ],
             // ...
-        ));
+        ]);
 
 Like with ``firewalls``, you can have multiple ``providers``, but you'll
 probably only need one. If you *do* have multiple, you can configure which
@@ -421,14 +421,14 @@ To fix this, add an ``encoders`` key:
     .. code-block:: php
 
         // app/config/security.php
-        $container->loadFromExtension('security', array(
+        $container->loadFromExtension('security', [
             // ...
 
-            'encoders' => array(
+            'encoders' => [
                 'Symfony\Component\Security\Core\User\User' => 'plaintext',
-            ),
+            ],
             // ...
-        ));
+        ]);
 
 User providers load user information and put it into a ``User`` object. If
 you :doc:`load users from the database </security/entity_provider>`
@@ -502,17 +502,17 @@ is ``bcrypt``:
     .. code-block:: php
 
         // app/config/security.php
-        $container->loadFromExtension('security', array(
+        $container->loadFromExtension('security', [
             // ...
 
-            'encoders' => array(
-                'Symfony\Component\Security\Core\User\User' => array(
+            'encoders' => [
+                'Symfony\Component\Security\Core\User\User' => [
                     'algorithm' => 'bcrypt',
                     'cost' => 12,
-                )
-            ),
+                ]
+            ],
             // ...
-        ));
+        ]);
 
 Of course, your users' passwords now need to be encoded with this exact algorithm.
 For hardcoded users, you can use the built-in command:
@@ -567,27 +567,27 @@ It will give you something like this:
     .. code-block:: php
 
         // app/config/security.php
-        $container->loadFromExtension('security', array(
+        $container->loadFromExtension('security', [
             // ...
 
-            'providers' => array(
-                'in_memory' => array(
-                    'memory' => array(
-                        'users' => array(
-                            'ryan' => array(
+            'providers' => [
+                'in_memory' => [
+                    'memory' => [
+                        'users' => [
+                            'ryan' => [
                                 'password' => '$2a$12$LCY0MefVIEc3TYPHV9SNnuzOfyr2p/AXIGoQJEDs4am4JwhNz/jli',
                                 'roles' => 'ROLE_USER',
-                            ),
-                            'admin' => array(
+                            ],
+                            'admin' => [
                                 'password' => '$2a$12$cyTWeE9kpq1PjqKFiWUZFuCRPwVyAZwm4XzMZ1qPUFl7/flCM3V0G',
                                 'roles' => 'ROLE_ADMIN',
-                            ),
-                        ),
-                    ),
-                ),
-            ),
+                            ],
+                        ],
+                    ],
+                ],
+            ],
             // ...
-        ));
+        ]);
 
 Everything will now work exactly like before. But if you have dynamic users
 (e.g. from a database), how can you programmatically encode the password
@@ -741,20 +741,20 @@ URL pattern. You saw this earlier, where anything matching the regular expressio
     .. code-block:: php
 
         // app/config/security.php
-        $container->loadFromExtension('security', array(
+        $container->loadFromExtension('security', [
             // ...
 
-            'firewalls' => array(
+            'firewalls' => [
                 // ...
-                'main' => array(
+                'main' => [
                     // ...
-                ),
-            ),
-           'access_control' => array(
+                ],
+            ],
+           'access_control' => [
                // require ROLE_ADMIN for /admin*
-                array('path' => '^/admin', 'role' => 'ROLE_ADMIN'),
-            ),
-        ));
+               ['path' => '^/admin', 'role' => 'ROLE_ADMIN'],
+           ],
+        ]);
 
 This is great for securing entire sections, but you'll also probably want
 to :ref:`secure your individual controllers <security-securing-controller>`
@@ -798,14 +798,14 @@ matches the URL.
     .. code-block:: php
 
         // app/config/security.php
-        $container->loadFromExtension('security', array(
+        $container->loadFromExtension('security', [
             // ...
 
-            'access_control' => array(
-                array('path' => '^/admin/users', 'role' => 'ROLE_SUPER_ADMIN'),
-                array('path' => '^/admin', 'role' => 'ROLE_ADMIN'),
-            ),
-        ));
+            'access_control' => [
+                ['path' => '^/admin/users', 'role' => 'ROLE_SUPER_ADMIN'],
+                ['path' => '^/admin', 'role' => 'ROLE_ADMIN'],
+            ],
+        ]);
 
 Prepending the path with ``^`` means that only URLs *beginning* with the
 pattern are matched. For example, a path of simply ``/admin`` (without
@@ -1135,16 +1135,16 @@ the firewall can handle this automatically for you when you activate the
     .. code-block:: php
 
         // app/config/security.php
-        $container->loadFromExtension('security', array(
+        $container->loadFromExtension('security', [
             // ...
 
-            'firewalls' => array(
-                'secured_area' => array(
+            'firewalls' => [
+                'secured_area' => [
                     // ...
-                    'logout' => array('path' => '/logout', 'target' => '/'),
-                ),
-            ),
-        ));
+                    'logout' => ['path' => '/logout', 'target' => '/'],
+                ],
+            ],
+        ]);
 
 Next, you'll need to create a route for this URL (but not a controller):
 
@@ -1234,17 +1234,17 @@ rules by creating a role hierarchy:
     .. code-block:: php
 
         // app/config/security.php
-        $container->loadFromExtension('security', array(
+        $container->loadFromExtension('security', [
             // ...
 
-            'role_hierarchy' => array(
+            'role_hierarchy' => [
                 'ROLE_ADMIN'       => 'ROLE_USER',
-                'ROLE_SUPER_ADMIN' => array(
+                'ROLE_SUPER_ADMIN' => [
                     'ROLE_ADMIN',
                     'ROLE_ALLOWED_TO_SWITCH',
-                ),
-            ),
-        ));
+                ],
+            ],
+        ]);
 
 In the above configuration, users with ``ROLE_ADMIN`` role will also have the
 ``ROLE_USER`` role. The ``ROLE_SUPER_ADMIN`` role has ``ROLE_ADMIN``, ``ROLE_ALLOWED_TO_SWITCH``
diff --git a/security/access_control.rst b/security/access_control.rst
index 439809cb939..d639e56b611 100644
--- a/security/access_control.rst
+++ b/security/access_control.rst
@@ -64,30 +64,30 @@ Take the following ``access_control`` entries as an example:
     .. code-block:: php
 
         // app/config/security.php
-        $container->loadFromExtension('security', array(
+        $container->loadFromExtension('security', [
             // ...
-            'access_control' => array(
-                array(
+            'access_control' => [
+                [
                     'path' => '^/admin',
                     'role' => 'ROLE_USER_IP',
                     'ip' => '127.0.0.1',
-                ),
-                array(
+                ],
+                [
                     'path' => '^/admin',
                     'role' => 'ROLE_USER_HOST',
                     'host' => 'symfony\.com$',
-                ),
-                array(
+                ],
+                [
                     'path' => '^/admin',
                     'role' => 'ROLE_USER_METHOD',
                     'methods' => 'POST, PUT',
-                ),
-                array(
+                ],
+                [
                     'path' => '^/admin',
                     'role' => 'ROLE_USER',
-                ),
-            ),
-        ));
+                ],
+            ],
+        ]);
 
 For each incoming request, Symfony will decide which ``access_control``
 to use based on the URI, the client's IP address, the incoming host name,
@@ -209,21 +209,21 @@ pattern so that it is only accessible by requests from the local server itself:
     .. code-block:: php
 
         // app/config/security.php
-        $container->loadFromExtension('security', array(
+        $container->loadFromExtension('security', [
             // ...
-            'access_control' => array(
-                array(
+            'access_control' => [
+                [
                     'path' => '^/internal',
                     'role' => 'IS_AUTHENTICATED_ANONYMOUSLY',
                     // the 'ips' option supports IP addresses and subnet masks
-                    'ips' => array('127.0.0.1', '::1'),
-                ),
-                array(
+                    'ips' => ['127.0.0.1', '::1'],
+                ],
+                [
                     'path' => '^/internal',
                     'role' => 'ROLE_NO_ACCESS',
-                ),
-            ),
-        ));
+                ],
+            ],
+        ]);
 
 Here is how it works when the path is ``/internal/something`` coming from
 the external IP address ``10.0.0.1``:
@@ -285,12 +285,12 @@ key:
 
     .. code-block:: php
 
-            'access_control' => array(
-                array(
+            'access_control' => [
+                [
                     'path' => '^/_internal/secure',
                     'allow_if' => '"127.0.0.1" == request.getClientIp() or has_role("ROLE_ADMIN")',
-                ),
-            ),
+                ],
+            ],
 
 In this case, when the user tries to access any URL starting with ``/_internal/secure``,
 they will only be granted access if the IP address is ``127.0.0.1`` or if
@@ -341,12 +341,12 @@ the user will be redirected to ``https``:
     .. code-block:: php
 
         // app/config/security.php
-        $container->loadFromExtension('security', array(
-            'access_control' => array(
-                array(
+        $container->loadFromExtension('security', [
+            'access_control' => [
+                [
                     'path' => '^/cart/checkout',
                     'role' => 'IS_AUTHENTICATED_ANONYMOUSLY',
                     'requires_channel' => 'https',
-                ),
-            ),
-        ));
+                ],
+            ],
+        ]);
diff --git a/security/access_denied_handler.rst b/security/access_denied_handler.rst
index 8ea2b26830f..bb55d4f6c83 100644
--- a/security/access_denied_handler.rst
+++ b/security/access_denied_handler.rst
@@ -59,14 +59,14 @@ configure it under your firewall:
         // app/config/security.php
         use AppBundle\Security\AccessDeniedHandler;
 
-        $container->loadFromExtension('security', array(
-            'firewalls' => array(
-                'main' => array(
+        $container->loadFromExtension('security', [
+            'firewalls' => [
+                'main' => [
                     // ...
                     'access_denied_handler' => AccessDeniedHandler::class,
-                ),
-            ),
-        ));
+                ],
+            ],
+        ]);
 
 That's it! Any ``AccessDeniedException`` thrown by code under the ``main`` firewall
 will now be handled by your service.
diff --git a/security/acl.rst b/security/acl.rst
index c588cab9add..d91ad08544b 100644
--- a/security/acl.rst
+++ b/security/acl.rst
@@ -82,13 +82,13 @@ First, you need to configure the connection the ACL system is supposed to use:
     .. code-block:: php
 
         // app/config/security.php
-        $container->loadFromExtension('security', array(
+        $container->loadFromExtension('security', [
             // ...
 
-            'acl' => array(
+            'acl' => [
                 'connection' => 'default',
-            ),
-        ));
+            ],
+        ]);
 
 .. note::
 
diff --git a/security/api_key_authentication.rst b/security/api_key_authentication.rst
index f88f41a2484..b0761402e68 100644
--- a/security/api_key_authentication.rst
+++ b/security/api_key_authentication.rst
@@ -189,7 +189,7 @@ The ``$userProvider`` might look something like this::
                 null,
                 // the roles for the user - you may choose to determine
                 // these dynamically somehow based on the user
-                array('ROLE_API')
+                ['ROLE_API']
             );
         }
 
@@ -340,23 +340,23 @@ and ``provider`` keys:
         use AppBundle\Security\ApiKeyAuthenticator;
         use AppBundle\Security\ApiKeyUserProvider;
 
-        $container->loadFromExtension('security', array(
-            'providers' => array(
-                'api_key_user_provider' => array(
+        $container->loadFromExtension('security', [
+            'providers' => [
+                'api_key_user_provider' => [
                     'id' => ApiKeyUserProvider::class,
-                ),
-            ),
-            'firewalls' => array(
-                'main' => array(
+                ],
+            ],
+            'firewalls' => [
+                'main' => [
                     'pattern'        => '^/api',
                     'stateless'      => true,
-                    'simple_preauth' => array(
+                    'simple_preauth' => [
                         'authenticator'  => ApiKeyAuthenticator::class,
-                    ),
+                    ],
                     'provider' => 'api_key_user_provider',
-                ),
-            ),
-        ));
+                ],
+            ],
+        ]);
 
 If you have defined ``access_control``, make sure to add a new entry:
 
@@ -388,14 +388,14 @@ If you have defined ``access_control``, make sure to add a new entry:
     .. code-block:: php
 
         // app/config/security.php
-        $container->loadFromExtension('security', array(
-            'access_control' => array(
-                array(
+        $container->loadFromExtension('security', [
+            'access_control' => [
+                [
                     'path' => '^/api',
                     'role' => 'ROLE_API',
-                ),
-            ),
-        ));
+                ],
+            ],
+        ]);
 
 That's it! Now, your ``ApiKeyAuthenticator`` should be called at the beginning
 of each request and your authentication process will take place.
@@ -458,15 +458,15 @@ configuration or set it to ``false``:
         // app/config/security.php
 
         // ..
-        $container->loadFromExtension('security', array(
-            'firewalls' => array(
-                'secured_area'       => array(
+        $container->loadFromExtension('security', [
+            'firewalls' => [
+                'secured_area'       => [
                     'pattern'        => '^/api',
                     'stateless'      => false,
                     // ...
-                ),
-            ),
-        ));
+                ],
+            ],
+        ]);
 
 Even though the token is being stored in the session, the credentials - in this
 case the API key (i.e. ``$token->getCredentials()``) - are not stored in the session
diff --git a/security/csrf_in_login_form.rst b/security/csrf_in_login_form.rst
index 919fb137a03..87b4cd30e5a 100644
--- a/security/csrf_in_login_form.rst
+++ b/security/csrf_in_login_form.rst
@@ -48,9 +48,9 @@ file:
     .. code-block:: php
 
         // app/config/config.php
-        $container->loadFromExtension('framework', array(
+        $container->loadFromExtension('framework', [
             'csrf_protection' => null,
-        ));
+        ]);
 
 Then, the security component needs a CSRF token provider. You can set this to
 use the default provider available in the security component:
@@ -93,19 +93,19 @@ use the default provider available in the security component:
     .. code-block:: php
 
         // app/config/security.php
-        $container->loadFromExtension('security', array(
+        $container->loadFromExtension('security', [
             // ...
 
-            'firewalls' => array(
-                'secured_area' => array(
+            'firewalls' => [
+                'secured_area' => [
                     // ...
-                    'form_login' => array(
+                    'form_login' => [
                         // ...
                         'csrf_token_generator' => 'security.csrf.token_manager',
-                    ),
-                ),
-            ),
-        ));
+                    ],
+                ],
+            ],
+        ]);
 
 The Security component can be configured further, but this is all information
 it needs to be able to use CSRF in the login form.
@@ -191,20 +191,20 @@ After this, you have protected your login form against CSRF attacks.
         .. code-block:: php
 
             // app/config/security.php
-            $container->loadFromExtension('security', array(
+            $container->loadFromExtension('security', [
                 // ...
 
-                'firewalls' => array(
-                    'secured_area' => array(
+                'firewalls' => [
+                    'secured_area' => [
                         // ...
-                        'form_login' => array(
+                        'form_login' => [
                             // ...
                             'csrf_parameter' => '_csrf_security_token',
                             'csrf_token_id'  => 'a_private_string',
-                        ),
-                    ),
-                ),
-            ));
+                        ],
+                    ],
+                ],
+            ]);
 
 .. _`Cross-site request forgery`: https://en.wikipedia.org/wiki/Cross-site_request_forgery
 .. _`Forging Login Requests`: https://en.wikipedia.org/wiki/Cross-site_request_forgery#Forging_login_requests
diff --git a/security/custom_authentication_provider.rst b/security/custom_authentication_provider.rst
index 41a02924fd1..b98983d2f52 100644
--- a/security/custom_authentication_provider.rst
+++ b/security/custom_authentication_provider.rst
@@ -72,7 +72,7 @@ provider::
         public $digest;
         public $nonce;
 
-        public function __construct(array $roles = array())
+        public function __construct(array $roles = [])
         {
             parent::__construct($roles);
 
@@ -328,7 +328,7 @@ create a class which implements
             $listenerId = 'security.authentication.listener.wsse.'.$id;
             $container->setDefinition($listenerId, new ChildDefinition(WsseListener::class));
 
-            return array($providerId, $listenerId, $defaultEntryPoint);
+            return [$providerId, $listenerId, $defaultEntryPoint];
         }
 
         public function getPosition()
@@ -448,10 +448,10 @@ to service ids that may not exist yet: ``AppBundle\Security\Authentication\Provi
             ->setPublic(false);
 
         $container->register(WsseListener::class)
-            ->setArguments(array(
+            ->setArguments([
                 new Reference('security.token_storage'),
                 new Reference('security.authentication.manager'),
-            ))
+            ])
             ->setPublic(false);
 
 Now that your services are defined, tell your security context about your
@@ -516,17 +516,17 @@ You are finished! You can now define parts of your app as under WSSE protection.
     .. code-block:: php
 
         // app/config/security.php
-        $container->loadFromExtension('security', array(
+        $container->loadFromExtension('security', [
             // ...
 
-            'firewalls' => array(
-                'wsse_secured' => array(
+            'firewalls' => [
+                'wsse_secured' => [
                     'pattern'   => '^/api/',
                     'stateless' => true,
                     'wsse'      => true,
-                ),
-            ),
-        ));
+                ],
+            ],
+        ]);
 
 Congratulations! You have written your very own custom security authentication
 provider!
@@ -629,19 +629,19 @@ set to any desirable value per firewall.
     .. code-block:: php
 
         // app/config/security.php
-        $container->loadFromExtension('security', array(
+        $container->loadFromExtension('security', [
             // ...
 
-            'firewalls' => array(
-                'wsse_secured' => array(
+            'firewalls' => [
+                'wsse_secured' => [
                     'pattern'   => '^/api/',
                     'stateless' => true,
-                    'wsse'      => array(
+                    'wsse'      => [
                         'lifetime' => 30,
-                    ),
-                ),
-            ),
-        ));
+                    ],
+                ],
+            ],
+        ]);
 
 The rest is up to you! Any relevant configuration items can be defined
 in the factory and consumed or passed to the other classes in the container.
diff --git a/security/custom_password_authenticator.rst b/security/custom_password_authenticator.rst
index 898363523e5..055a7562164 100644
--- a/security/custom_password_authenticator.rst
+++ b/security/custom_password_authenticator.rst
@@ -74,7 +74,7 @@ the user::
                 // (so don't put any un-trusted messages / error strings here)
                 throw new CustomUserMessageAuthenticationException(
                     'You can only log in between 2 and 4!',
-                    array(), // Message Data
+                    [], // Message Data
                     412 // HTTP 412 Precondition Failed
                 );
             }
@@ -205,19 +205,19 @@ using the ``simple_form`` key:
         // ...
         use AppBundle\Security\TimeAuthenticator;
 
-        $container->loadFromExtension('security', array(
-            'firewalls' => array(
-                'secured_area'    => array(
+        $container->loadFromExtension('security', [
+            'firewalls' => [
+                'secured_area'    => [
                     'pattern'     => '^/admin',
-                    'simple_form' => array(
+                    'simple_form' => [
                         'provider'      => ...,
                         'authenticator' => AppBundle\Security\TimeAuthenticator::class,
                         'check_path'    => 'login_check',
                         'login_path'    => 'login',
-                    ),
-                ),
-            ),
-        ));
+                    ],
+                ],
+            ],
+        ]);
 
 The ``simple_form`` key has the same options as the normal ``form_login``
 option, but with the additional ``authenticator`` key that points to the
diff --git a/security/custom_provider.rst b/security/custom_provider.rst
index d55db645f6e..ddc4aa2f13b 100644
--- a/security/custom_provider.rst
+++ b/security/custom_provider.rst
@@ -222,15 +222,15 @@ to the list of providers in the "security" section. Choose a name for the user p
         // app/config/security.php
         use AppBundle\Security\User\WebserviceUserProvider;
 
-        $container->loadFromExtension('security', array(
+        $container->loadFromExtension('security', [
             // ...
 
-            'providers' => array(
-                'webservice' => array(
+            'providers' => [
+                'webservice' => [
                     'id' => WebserviceUserProvider::class,
-                ),
-            ),
-        ));
+                ],
+            ],
+        ]);
 
 Symfony also needs to know how to encode passwords that are supplied by website
 users, e.g. by filling in a login form. You can do this by adding a line to the
@@ -270,14 +270,14 @@ users, e.g. by filling in a login form. You can do this by adding a line to the
         // app/config/security.php
         use AppBundle\Security\User\WebserviceUser;
 
-        $container->loadFromExtension('security', array(
+        $container->loadFromExtension('security', [
             // ...
 
-            'encoders' => array(
+            'encoders' => [
                 WebserviceUser::class => 'bcrypt',
-            ),
+            ],
             // ...
-        ));
+        ]);
 
 The value here should correspond with however the passwords were originally
 encoded when creating your users (however those users were created). When
@@ -341,15 +341,15 @@ is compared to the hashed password returned by your ``getPassword()`` method.
             // app/config/security.php
             use AppBundle\Security\User\WebserviceUser;
 
-            $container->loadFromExtension('security', array(
+            $container->loadFromExtension('security', [
                 // ...
 
-                'encoders' => array(
-                    WebserviceUser::class => array(
+                'encoders' => [
+                    WebserviceUser::class => [
                         'algorithm' => 'bcrypt',
                         'cost' => 12,
-                    ),
-                ),
-            ));
+                    ],
+                ],
+            ]);
 
 .. _MessageDigestPasswordEncoder: https://github.com/symfony/symfony/blob/master/src/Symfony/Component/Security/Core/Encoder/MessageDigestPasswordEncoder.php
diff --git a/security/entity_provider.rst b/security/entity_provider.rst
index 001beb16519..d09f765eaf9 100644
--- a/security/entity_provider.rst
+++ b/security/entity_provider.rst
@@ -105,7 +105,7 @@ For this article, suppose that you already have a ``User`` entity inside an
 
         public function getRoles()
         {
-            return array('ROLE_USER');
+            return ['ROLE_USER'];
         }
 
         public function eraseCredentials()
@@ -115,13 +115,13 @@ For this article, suppose that you already have a ``User`` entity inside an
         /** @see \Serializable::serialize() */
         public function serialize()
         {
-            return serialize(array(
+            return serialize([
                 $this->id,
                 $this->username,
                 $this->password,
                 // see section on salt below
                 // $this->salt,
-            ));
+            ]);
         }
 
         /** @see \Serializable::unserialize() */
@@ -133,7 +133,7 @@ For this article, suppose that you already have a ``User`` entity inside an
                 $this->password,
                 // see section on salt below
                 // $this->salt
-            ) = unserialize($serialized, array('allowed_classes' => false));
+            ) = unserialize($serialized, ['allowed_classes' => false]);
         }
     }
 
@@ -264,33 +264,33 @@ the username and then check the password (more on passwords in a moment):
         // app/config/security.php
         use AppBundle\Entity\User;
 
-        $container->loadFromExtension('security', array(
-            'encoders' => array(
-                User::class => array(
+        $container->loadFromExtension('security', [
+            'encoders' => [
+                User::class => [
                     'algorithm' => 'bcrypt',
-                ),
-            ),
+                ],
+            ],
 
             // ...
 
-            'providers' => array(
-                'our_db_provider' => array(
-                    'entity' => array(
+            'providers' => [
+                'our_db_provider' => [
+                    'entity' => [
                         'class'    => 'AppBundle:User',
                         'property' => 'username',
-                    ),
-                ),
-            ),
-            'firewalls' => array(
-                'main' => array(
+                    ],
+                ],
+            ],
+            'firewalls' => [
+                'main' => [
                     'pattern'    => '^/',
                     'http_basic' => null,
                     'provider'   => 'our_db_provider',
-                ),
-            ),
+                ],
+            ],
 
             // ...
-        ));
+        ]);
 
 First, the ``encoders`` section tells Symfony to expect that the passwords
 in the database will be encoded using ``bcrypt``. Second, the ``providers``
@@ -376,10 +376,10 @@ so you only need the new interface::
         // serialize and unserialize must be updated - see below
         public function serialize()
         {
-            return serialize(array(
+            return serialize([
                 // ...
                 $this->isActive,
-            ));
+            ]);
         }
         public function unserialize($serialized)
         {
@@ -496,17 +496,17 @@ To finish this, just remove the ``property`` key from the user provider in
     .. code-block:: php
 
         // app/config/security.php
-        $container->loadFromExtension('security', array(
+        $container->loadFromExtension('security', [
             // ...
 
-            'providers' => array(
-                'our_db_provider' => array(
-                    'entity' => array(
+            'providers' => [
+                'our_db_provider' => [
+                    'entity' => [
                         'class' => 'AppBundle:User',
-                    ),
-                ),
-            ),
-        ));
+                    ],
+                ],
+            ],
+        ]);
 
 This tells Symfony to *not* query automatically for the User. Instead, when
 someone logs in, the ``loadUserByUsername()`` method on ``UserRepository``
diff --git a/security/firewall_restriction.rst b/security/firewall_restriction.rst
index 96d4a1e37f9..299e457c61b 100644
--- a/security/firewall_restriction.rst
+++ b/security/firewall_restriction.rst
@@ -55,14 +55,14 @@ matches the configured ``pattern``.
         // app/config/security.php
 
         // ...
-        $container->loadFromExtension('security', array(
-            'firewalls' => array(
-                'secured_area' => array(
+        $container->loadFromExtension('security', [
+            'firewalls' => [
+                'secured_area' => [
                     'pattern' => '^/admin',
                     // ...
-                ),
-            ),
-        ));
+                ],
+            ],
+        ]);
 
 The ``pattern`` is a regular expression. In this example, the firewall will only be
 activated if the URL starts (due to the ``^`` regex character) with ``/admin``. If
@@ -112,14 +112,14 @@ only initialize if the host from the request matches against the configuration.
         // app/config/security.php
 
         // ...
-        $container->loadFromExtension('security', array(
-            'firewalls' => array(
-                'secured_area' => array(
+        $container->loadFromExtension('security', [
+            'firewalls' => [
+                'secured_area' => [
                     'host' => '^admin\.example\.com$',
                     // ...
-                ),
-            ),
-        ));
+                ],
+            ],
+        ]);
 
 The ``host`` (like the ``pattern``) is a regular expression. In this example,
 the firewall will only be activated if the host is equal exactly (due to
@@ -170,14 +170,14 @@ the provided HTTP methods.
         // app/config/security.php
 
         // ...
-        $container->loadFromExtension('security', array(
-            'firewalls' => array(
-                'secured_area' => array(
-                    'methods' => array('GET', 'POST'),
+        $container->loadFromExtension('security', [
+            'firewalls' => [
+                'secured_area' => [
+                    'methods' => ['GET', 'POST'],
                     // ...
-                ),
-            ),
-        ));
+                ],
+            ],
+        ]);
 
 In this example, the firewall will only be activated if the HTTP method of the
 request is either ``GET`` or ``POST``. If the method is not in the array of the
diff --git a/security/force_https.rst b/security/force_https.rst
index 286f1ef0b81..dd8e4fc1b3b 100644
--- a/security/force_https.rst
+++ b/security/force_https.rst
@@ -40,17 +40,17 @@ to use HTTPS then you could use the following configuration:
         .. code-block:: php
 
             // app/config/security.php
-            $container->loadFromExtension('security', array(
+            $container->loadFromExtension('security', [
                 // ...
 
-                'access_control' => array(
-                    array(
+                'access_control' => [
+                    [
                         'path'             => '^/secure',
                         'role'             => 'ROLE_ADMIN',
                         'requires_channel' => 'https',
-                    ),
-                ),
-            ));
+                    ],
+                ],
+            ]);
 
 The login form itself needs to allow anonymous access, otherwise users will
 be unable to authenticate. To force it to use HTTPS you can still use
@@ -91,17 +91,17 @@ role:
     .. code-block:: php
 
         // app/config/security.php
-        $container->loadFromExtension('security', array(
+        $container->loadFromExtension('security', [
             // ...
 
-            'access_control' => array(
-                array(
+            'access_control' => [
+                [
                     'path'             => '^/login',
                     'role'             => 'IS_AUTHENTICATED_ANONYMOUSLY',
                     'requires_channel' => 'https',
-                ),
-            ),
-        ));
+                ],
+            ],
+        ]);
 
 It is also possible to specify using HTTPS in the routing configuration,
 see :doc:`/routing/scheme` for more details.
diff --git a/security/form_login.rst b/security/form_login.rst
index f0a42b9dabf..c7ca98270e2 100644
--- a/security/form_login.rst
+++ b/security/form_login.rst
@@ -67,20 +67,20 @@ a relative/absolute URL or a Symfony route name:
     .. code-block:: php
 
         // app/config/security.php
-        $container->loadFromExtension('security', array(
+        $container->loadFromExtension('security', [
             // ...
 
-            'firewalls' => array(
-                'main' => array(
+            'firewalls' => [
+                'main' => [
                     // ...
 
-                    'form_login' => array(
+                    'form_login' => [
                         // ...
                         'default_target_path' => 'after_login_route_name',
-                    ),
-                ),
-            ),
-        ));
+                    ],
+                ],
+            ],
+        ]);
 
 Always Redirect to the default Page
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
@@ -125,20 +125,20 @@ previously requested URL and always redirect to the default page:
     .. code-block:: php
 
         // app/config/security.php
-        $container->loadFromExtension('security', array(
+        $container->loadFromExtension('security', [
             // ...
 
-            'firewalls' => array(
-                'main' => array(
+            'firewalls' => [
+                'main' => [
                     // ...
 
-                    'form_login' => array(
+                    'form_login' => [
                         // ...
                         'always_use_default_target_path' => true,
-                    ),
-                ),
-            ),
-        ));
+                    ],
+                ],
+            ],
+        ]);
 
 .. _control-the-redirect-url-from-inside-the-form:
 
@@ -213,19 +213,19 @@ parameter is included in the request, you may use the value of the
     .. code-block:: php
 
         // app/config/security.php
-        $container->loadFromExtension('security', array(
+        $container->loadFromExtension('security', [
             // ...
 
-            'firewalls' => array(
-                'main' => array(
+            'firewalls' => [
+                'main' => [
                     // ...
-                    'form_login' => array(
+                    'form_login' => [
                         // ...
                         'use_referer' => true,
-                    ),
-                ),
-            ),
-        ));
+                    ],
+                ],
+            ],
+        ]);
 
 .. note::
 
@@ -279,19 +279,19 @@ option to define a new target via a relative/absolute URL or a Symfony route nam
     .. code-block:: php
 
         // app/config/security.php
-        $container->loadFromExtension('security', array(
+        $container->loadFromExtension('security', [
             // ...
 
-            'firewalls' => array(
-                'main' => array(
+            'firewalls' => [
+                'main' => [
                     // ...
-                    'form_login' => array(
+                    'form_login' => [
                         // ...
                         'failure_path' => 'login_failure_route_name',
-                    ),
-                ),
-            ),
-        ));
+                    ],
+                ],
+            ],
+        ]);
 
 This option can also be set via the ``_failure_path`` request parameter:
 
@@ -355,19 +355,19 @@ redirects can be customized using the  ``target_path_parameter`` and
     .. code-block:: php
 
         // app/config/security.php
-        $container->loadFromExtension('security', array(
+        $container->loadFromExtension('security', [
             // ...
 
-            'firewalls' => array(
-                'main' => array(
+            'firewalls' => [
+                'main' => [
                     // ...
-                    'form_login' => array(
+                    'form_login' => [
                         'target_path_parameter' => 'go_to',
                         'failure_path_parameter' => 'back_to',
-                    ),
-                ),
-            ),
-        ));
+                    ],
+                ],
+            ],
+        ]);
 
 Using the above configuration, the query string parameters and hidden form fields
 are now fully customized:
diff --git a/security/form_login_setup.rst b/security/form_login_setup.rst
index f42a041ba16..527ffa120f2 100644
--- a/security/form_login_setup.rst
+++ b/security/form_login_setup.rst
@@ -50,17 +50,17 @@ First, enable form login under your firewall:
     .. code-block:: php
 
         // app/config/security.php
-        $container->loadFromExtension('security', array(
-            'firewalls' => array(
-                'main' => array(
+        $container->loadFromExtension('security', [
+            'firewalls' => [
+                'main' => [
                     'anonymous'  => null,
-                    'form_login' => array(
+                    'form_login' => [
                         'login_path' => 'login',
                         'check_path' => 'login',
-                    ),
-                ),
-            ),
-        ));
+                    ],
+                ],
+            ],
+        ]);
 
 .. tip::
 
@@ -131,9 +131,9 @@ configuration (``login``):
         use Symfony\Component\Routing\Route;
 
         $routes = new RouteCollection();
-        $routes->add('login', new Route('/login', array(
+        $routes->add('login', new Route('/login', [
             '_controller' => 'AppBundle:Security:login',
-        )));
+        ]));
 
         return $routes;
 
@@ -150,10 +150,10 @@ Great! Next, add the logic to ``loginAction()`` that displays the login form::
         // last username entered by the user
         $lastUsername = $authenticationUtils->getLastUsername();
 
-        return $this->render('security/login.html.twig', array(
+        return $this->render('security/login.html.twig', [
             'last_username' => $lastUsername,
             'error'         => $error,
-        ));
+        ]);
     }
 
 .. note::
@@ -306,9 +306,9 @@ all URLs (including the ``/login`` URL), will cause a redirect loop:
         // app/config/security.php
 
         // ...
-        'access_control' => array(
-            array('path' => '^/', 'role' => 'ROLE_ADMIN'),
-        ),
+        'access_control' => [
+            ['path' => '^/', 'role' => 'ROLE_ADMIN'],
+        ],
 
 Adding an access control that matches ``/login/*`` and requires *no* authentication
 fixes the problem:
@@ -346,10 +346,10 @@ fixes the problem:
         // app/config/security.php
 
         // ...
-        'access_control' => array(
-            array('path' => '^/login', 'role' => 'IS_AUTHENTICATED_ANONYMOUSLY'),
-            array('path' => '^/', 'role' => 'ROLE_ADMIN'),
-        ),
+        'access_control' => [
+            ['path' => '^/login', 'role' => 'IS_AUTHENTICATED_ANONYMOUSLY'],
+            ['path' => '^/', 'role' => 'ROLE_ADMIN'],
+        ],
 
 3. Be Sure check_path Is Behind a Firewall
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
diff --git a/security/guard_authentication.rst b/security/guard_authentication.rst
index eb0cd98fdbf..7a8e653644f 100644
--- a/security/guard_authentication.rst
+++ b/security/guard_authentication.rst
@@ -55,7 +55,7 @@ property they use to access their account via the API::
 
         public function getRoles()
         {
-            return array('ROLE_USER');
+            return ['ROLE_USER'];
         }
 
         public function getPassword()
@@ -126,19 +126,19 @@ Next, make sure you've configured a "user provider" for the user:
     .. code-block:: php
 
         // app/config/security.php
-        $container->loadFromExtension('security', array(
+        $container->loadFromExtension('security', [
             // ...
 
-            'providers' => array(
-                'your_db_provider' => array(
-                    'entity' => array(
+            'providers' => [
+                'your_db_provider' => [
+                    'entity' => [
                         'class' => 'AppBundle:User',
-                    ),
-                ),
-            ),
+                    ],
+                ],
+            ],
 
             // ...
-        ));
+        ]);
 
 That's it! Need more information about this step, see:
 
@@ -187,9 +187,9 @@ This requires you to implement several methods::
          */
         public function getCredentials(Request $request)
         {
-            return array(
+            return [
                 'token' => $request->headers->get('X-AUTH-TOKEN'),
-            );
+            ];
         }
 
         public function getUser($credentials, UserProviderInterface $userProvider)
@@ -221,12 +221,12 @@ This requires you to implement several methods::
 
         public function onAuthenticationFailure(Request $request, AuthenticationException $exception)
         {
-            $data = array(
+            $data = [
                 'message' => strtr($exception->getMessageKey(), $exception->getMessageData())
 
                 // or to translate this message
                 // $this->translator->trans($exception->getMessageKey(), $exception->getMessageData())
-            );
+            ];
 
             return new JsonResponse($data, Response::HTTP_FORBIDDEN);
         }
@@ -236,10 +236,10 @@ This requires you to implement several methods::
          */
         public function start(Request $request, AuthenticationException $authException = null)
         {
-            $data = array(
+            $data = [
                 // you might translate this message
                 'message' => 'Authentication Required'
-            );
+            ];
 
             return new JsonResponse($data, Response::HTTP_UNAUTHORIZED);
         }
@@ -325,21 +325,21 @@ Finally, configure your ``firewalls`` key in ``security.yml`` to use this authen
         // ..
         use AppBundle\Security\TokenAuthenticator;
 
-        $container->loadFromExtension('security', array(
-            'firewalls' => array(
-                'main'       => array(
+        $container->loadFromExtension('security', [
+            'firewalls' => [
+                'main'       => [
                     'pattern'        => '^/',
                     'anonymous'      => true,
                     'logout'         => true,
-                    'guard'          => array(
-                        'authenticators'  => array(
+                    'guard'          => [
+                        'authenticators'  => [
                             TokenAuthenticator::class
-                        ),
-                    ),
+                        ],
+                    ],
                     // ...
-                ),
-            ),
-        ));
+                ],
+            ],
+        ]);
 
 You did it! You now have a fully-working API token authentication system. If your
 homepage required ``ROLE_USER``, then you could test it under different conditions:
diff --git a/security/impersonating_user.rst b/security/impersonating_user.rst
index 39d585c9d52..95da6165606 100644
--- a/security/impersonating_user.rst
+++ b/security/impersonating_user.rst
@@ -55,16 +55,16 @@ firewall listener:
     .. code-block:: php
 
         // app/config/security.php
-        $container->loadFromExtension('security', array(
+        $container->loadFromExtension('security', [
             // ...
 
-            'firewalls' => array(
-                'main'=> array(
+            'firewalls' => [
+                'main'=> [
                     // ...
                     'switch_user' => true,
-                ),
-            ),
-        ));
+                ],
+            ],
+        ]);
 
 .. tip::
 
@@ -167,19 +167,19 @@ setting:
     .. code-block:: php
 
         // app/config/security.php
-        $container->loadFromExtension('security', array(
+        $container->loadFromExtension('security', [
             // ...
 
-            'firewalls' => array(
-                'main'=> array(
+            'firewalls' => [
+                'main'=> [
                     // ...
-                    'switch_user' => array(
+                    'switch_user' => [
                         'role' => 'ROLE_ADMIN',
                         'parameter' => '_want_to_be_this_user',
-                    ),
-                ),
-            ),
-        ));
+                    ],
+                ],
+            ],
+        ]);
 
 Events
 ------
@@ -212,10 +212,10 @@ you switch users, add an event subscriber on this event::
 
         public static function getSubscribedEvents()
         {
-            return array(
+            return [
                 // constant for security.switch_user
                 SecurityEvents::SWITCH_USER => 'onSwitchUser',
-            );
+            ];
         }
     }
 
diff --git a/security/json_login_setup.rst b/security/json_login_setup.rst
index e8a038f2fcc..d29ce1cb812 100644
--- a/security/json_login_setup.rst
+++ b/security/json_login_setup.rst
@@ -42,16 +42,16 @@ First, enable the JSON login under your firewall:
     .. code-block:: php
 
         // app/config/security.php
-        $container->loadFromExtension('security', array(
-            'firewalls' => array(
-                'main' => array(
+        $container->loadFromExtension('security', [
+            'firewalls' => [
+                'main' => [
                     'anonymous'  => null,
-                    'json_login' => array(
+                    'json_login' => [
                         'check_path' => '/login',
-                    ),
-                ),
-            ),
-        ));
+                    ],
+                ],
+            ],
+        ]);
 
 .. tip::
 
@@ -80,10 +80,10 @@ The next step is to configure a route in your app matching this path:
             {
                 $user = $this->getUser();
 
-                return $this->json(array(
+                return $this->json([
                     'username' => $user->getUsername(),
                     'roles' => $user->getRoles(),
-                ));
+                ]);
             }
         }
 
@@ -115,9 +115,9 @@ The next step is to configure a route in your app matching this path:
         use Symfony\Component\Routing\Route;
 
         $routes = new RouteCollection();
-        $routes->add('login', new Route('/login', array(
+        $routes->add('login', new Route('/login', [
             '_controller' => 'AppBundle:Security:login',
-        )));
+        ]));
 
         return $routes;
 
@@ -193,15 +193,15 @@ The security configuration should be:
     .. code-block:: php
 
         // app/config/security.php
-        $container->loadFromExtension('security', array(
-            'firewalls' => array(
-                'main' => array(
+        $container->loadFromExtension('security', [
+            'firewalls' => [
+                'main' => [
                     'anonymous'  => null,
-                    'json_login' => array(
+                    'json_login' => [
                         'check_path' => 'login',
                         'username_path' => 'security.credentials.login',
                         'password_path' => 'security.credentials.password',
-                    ),
-                ),
-            ),
-        ));
+                    ],
+                ],
+            ],
+        ]);
diff --git a/security/ldap.rst b/security/ldap.rst
index b22645914fc..949e55e1bf1 100644
--- a/security/ldap.rst
+++ b/security/ldap.rst
@@ -106,15 +106,15 @@ An LDAP client can be simply configured using the built-in
 
         $container
             ->register(Adapter::class)
-            ->setArguments(array(
+            ->setArguments([
                 'host' => 'my-server',
                 'port' => 389,
                 'encryption' => 'tls',
-                'options' => array(
+                'options' => [
                     'protocol_version' => 3,
                     'referrals' => false
-                ),
-            ));
+                ],
+            ]);
 
 Fetching Users Using the LDAP User Provider
 -------------------------------------------
@@ -168,20 +168,20 @@ use the ``ldap`` user provider.
 
         use Symfony\Component\Ldap\Ldap;
 
-        $container->loadFromExtension('security', array(
-            'providers' => array(
-                'ldap_users' => array(
-                    'ldap' => array(
+        $container->loadFromExtension('security', [
+            'providers' => [
+                'ldap_users' => [
+                    'ldap' => [
                         'service' => Ldap::class,
                         'base_dn' => 'dc=example,dc=com',
                         'search_dn' => 'cn=read-only-admin,dc=example,dc=com',
                         'search_password' => 'password',
                         'default_roles' => 'ROLE_USER',
                         'uid_key' => 'uid',
-                    ),
-                ),
-            ),
-        );
+                    ],
+                ],
+            ],
+        ];
 
 .. caution::
 
@@ -369,17 +369,17 @@ Configuration example for form login
 
         use Symfony\Component\Ldap\Ldap;
 
-        $container->loadFromExtension('security', array(
-            'firewalls' => array(
-                'main' => array(
-                    'form_login_ldap' => array(
+        $container->loadFromExtension('security', [
+            'firewalls' => [
+                'main' => [
+                    'form_login_ldap' => [
                         'service' => Ldap::class,
                         'dn_string' => 'uid={username},dc=example,dc=com',
                         // ...
-                    ),
-                ),
-            )
-        );
+                    ],
+                ],
+            ]
+        ];
 
 Configuration example for HTTP Basic
 ....................................
@@ -421,18 +421,18 @@ Configuration example for HTTP Basic
 
         use Symfony\Component\Ldap\Ldap;
 
-        $container->loadFromExtension('security', array(
-            'firewalls' => array(
-                'main' => array(
-                    'http_basic_ldap' => array(
+        $container->loadFromExtension('security', [
+            'firewalls' => [
+                'main' => [
+                    'http_basic_ldap' => [
                         'service' => Ldap::class,
                         'dn_string' => 'uid={username},dc=example,dc=com',
                         // ...
-                    ),
+                    ],
                     'stateless' => true,
-                ),
-            ),
-        );
+                ],
+            ],
+        ];
 
 Configuration example for form login and query_string
 .....................................................
@@ -479,18 +479,18 @@ Configuration example for form login and query_string
         // app/config/security.php
         use Symfony\Component\Ldap\Ldap;
 
-        $container->loadFromExtension('security', array(
-            'firewalls' => array(
-                'main' => array(
-                    'form_login_ldap' => array(
+        $container->loadFromExtension('security', [
+            'firewalls' => [
+                'main' => [
+                    'form_login_ldap' => [
                         'service' => Ldap::class,
                         'dn_string' => 'dc=example,dc=com',
                         'query_string' => '(&(uid={username})(memberOf=cn=users,ou=Services,dc=example,dc=com))',
                         // ...
-                    ),
-                ),
-            )
-        );
+                    ],
+                ],
+            ]
+        ];
 
 .. _`LDAP PHP extension`: http://www.php.net/manual/en/intro.ldap.php
 .. _`RFC4515`: http://www.faqs.org/rfcs/rfc4515.html
diff --git a/security/multiple_guard_authenticators.rst b/security/multiple_guard_authenticators.rst
index d7664cf2fb3..7816f6030d3 100644
--- a/security/multiple_guard_authenticators.rst
+++ b/security/multiple_guard_authenticators.rst
@@ -62,21 +62,21 @@ This is how your security configuration can look in action:
         use AppBundle\Security\LoginFormAuthenticator;
         use AppBundle\Security\FacebookConnectAuthenticator;
 
-        $container->loadFromExtension('security', array(
+        $container->loadFromExtension('security', [
             // ...
-            'firewalls' => array(
-                'default' => array(
+            'firewalls' => [
+                'default' => [
                     'anonymous' => null,
-                    'guard' => array(
+                    'guard' => [
                         'entry_point' => '',
-                        'authenticators' => array(
+                        'authenticators' => [
                             LoginFormAuthenticator::class,
                             FacebookConnectAuthenticator::class'
-                        ),
-                    ),
-                ),
-            ),
-        ));
+                        ],
+                    ],
+                ],
+            ],
+        ]);
 
 There is one limitation with this approach - you have to use exactly one entry point.
 
@@ -147,29 +147,29 @@ the solution is to split the configuration into two separate firewalls:
         use AppBundle\Security\ApiTokenAuthenticator;
         use AppBundle\Security\LoginFormAuthenticator;
 
-        $container->loadFromExtension('security', array(
+        $container->loadFromExtension('security', [
             // ...
-            'firewalls' => array(
-                'api' => array(
+            'firewalls' => [
+                'api' => [
                     'pattern' => '^/api',
-                    'guard' => array(
-                        'authenticators' => array(
+                    'guard' => [
+                        'authenticators' => [
                             ApiTokenAuthenticator::class,
-                        ),
-                    ),
-                ),
-                'default' => array(
+                        ],
+                    ],
+                ],
+                'default' => [
                     'anonymous' => null,
-                    'guard' => array(
-                        'authenticators' => array(
+                    'guard' => [
+                        'authenticators' => [
                             LoginFormAuthenticator::class,
-                        ),
-                    ),
-                ),
-            ),
-            'access_control' => array(
-                array('path' => '^/login', 'role' => 'IS_AUTHENTICATED_ANONYMOUSLY'),
-                array('path' => '^/api', 'role' => 'ROLE_API_USER'),
-                array('path' => '^/', 'role' => 'ROLE_USER'),
-            ),
-        ));
+                        ],
+                    ],
+                ],
+            ],
+            'access_control' => [
+                ['path' => '^/login', 'role' => 'IS_AUTHENTICATED_ANONYMOUSLY'],
+                ['path' => '^/api', 'role' => 'ROLE_API_USER'],
+                ['path' => '^/', 'role' => 'ROLE_USER'],
+            ],
+        ]);
diff --git a/security/multiple_user_providers.rst b/security/multiple_user_providers.rst
index f0c1e5a0fd0..dd0e79f8b3c 100644
--- a/security/multiple_user_providers.rst
+++ b/security/multiple_user_providers.rst
@@ -65,28 +65,28 @@ a new provider that chains the two together:
         // app/config/security.php
         use AppBundle\Entity\User;
 
-        $container->loadFromExtension('security', array(
-            'providers' => array(
-                'chain_provider' => array(
-                    'chain' => array(
-                        'providers' => array('in_memory', 'user_db'),
-                    ),
-                ),
-                'in_memory' => array(
-                    'memory' => array(
-                       'users' => array(
-                           'foo' => array('password' => 'test'),
-                       ),
-                    ),
-                ),
-                'user_db' => array(
-                    'entity' => array(
+        $container->loadFromExtension('security', [
+            'providers' => [
+                'chain_provider' => [
+                    'chain' => [
+                        'providers' => ['in_memory', 'user_db'],
+                    ],
+                ],
+                'in_memory' => [
+                    'memory' => [
+                        'users' => [
+                            'foo' => ['password' => 'test'],
+                        ],
+                    ],
+                ],
+                'user_db' => [
+                    'entity' => [
                         'class'    => User::class,
                         'property' => 'username',
-                    ),
-                ),
-            ),
-        ));
+                    ],
+                ],
+            ],
+        ]);
 
 Now, all firewalls that explicitly define ``chain_provider`` as their user
 provider will, in turn, try to load the user from both the ``in_memory`` and
@@ -142,21 +142,21 @@ the first provider is always used:
     .. code-block:: php
 
         // app/config/security.php
-        $container->loadFromExtension('security', array(
-            'firewalls' => array(
-                'secured_area' => array(
+        $container->loadFromExtension('security', [
+            'firewalls' => [
+                'secured_area' => [
                     // ...
                     'pattern' => '^/',
                     'provider' => 'user_db',
-                    'http_basic' => array(
+                    'http_basic' => [
                         // ...
                         'realm' => 'Secured Demo Area',
                         'provider' => 'in_memory',
-                    ),
-                    'form_login' => array(),
-                ),
-            ),
-        ));
+                    ],
+                    'form_login' => [],
+                ],
+            ],
+        ]);
 
 In this example, if a user tries to log in via HTTP authentication, the authentication
 system will use the ``in_memory`` user provider. But if the user tries to
diff --git a/security/named_encoders.rst b/security/named_encoders.rst
index 9b7d505b787..e875a9e13f5 100644
--- a/security/named_encoders.rst
+++ b/security/named_encoders.rst
@@ -40,14 +40,14 @@ to apply to all instances of a specific class:
         // app/config/security.php
         use Symfony\Component\Security\Core\User\User;
 
-        $container->loadFromExtension('security', array(
+        $container->loadFromExtension('security', [
             // ...
-            'encoders' => array(
-                User::class => array(
+            'encoders' => [
+                User::class => [
                     'algorithm' => 'sha512',
-                ),
-            ),
-        ));
+                ],
+            ],
+        ]);
 
 Another option is to use a "named" encoder and then select which encoder
 you want to use dynamically.
@@ -91,15 +91,15 @@ named encoders:
     .. code-block:: php
 
         // app/config/security.php
-        $container->loadFromExtension('security', array(
+        $container->loadFromExtension('security', [
             // ...
-            'encoders' => array(
-                'harsh' => array(
+            'encoders' => [
+                'harsh' => [
                     'algorithm' => 'bcrypt',
                     'cost'      => '15',
-                ),
-            ),
-        ));
+                ],
+            ],
+        ]);
 
 .. note::
 
@@ -167,14 +167,14 @@ you must register a service for it in order to use it as a named encoder:
     .. code-block:: php
 
         // app/config/security.php
-        $container->loadFromExtension('security', array(
+        $container->loadFromExtension('security', [
             // ...
-            'encoders' => array(
-                'app_encoder' => array(
+            'encoders' => [
+                'app_encoder' => [
                     'id' => 'app.password_encoder_service',
-                ),
-            ),
-        ));
+                ],
+            ],
+        ]);
 
 This creates an encoder named ``app_encoder`` from a service named
 ``app.password_encoder_service``.
diff --git a/security/pre_authenticated.rst b/security/pre_authenticated.rst
index 966b657d52d..5f3914de69e 100644
--- a/security/pre_authenticated.rst
+++ b/security/pre_authenticated.rst
@@ -64,18 +64,18 @@ Enable the x509 authentication for a particular firewall in the security configu
     .. code-block:: php
 
         // app/config/security.php
-        $container->loadFromExtension('security', array(
+        $container->loadFromExtension('security', [
             // ...
 
-            'firewalls' => array(
-                'secured_area' => array(
+            'firewalls' => [
+                'secured_area' => [
                     'pattern' => '^/',
-                    'x509'    => array(
+                    'x509'    => [
                         'provider' => 'your_user_provider',
-                    ),
-                ),
-            ),
-        ));
+                    ],
+                ],
+            ],
+        ]);
 
 By default, the firewall provides the ``SSL_CLIENT_S_DN_Email`` variable to
 the user provider, and sets the ``SSL_CLIENT_S_DN`` as credentials in the
@@ -136,16 +136,16 @@ corresponding firewall in your security configuration:
     .. code-block:: php
 
         // app/config/security.php
-        $container->loadFromExtension('security', array(
-            'firewalls' => array(
-                'secured_area' => array(
+        $container->loadFromExtension('security', [
+            'firewalls' => [
+                'secured_area' => [
                     'pattern'     => '^/',
-                    'remote_user' => array(
+                    'remote_user' => [
                         'provider' => 'your_user_provider',
-                    ),
-                ),
-            ),
-        ));
+                    ],
+                ],
+            ],
+        ]);
 
 The firewall will then provide the ``REMOTE_USER`` environment variable to
 your user provider. You can change the variable name used by setting the ``user``
diff --git a/security/remember_me.rst b/security/remember_me.rst
index 015d48ad9de..3524ac8f69c 100644
--- a/security/remember_me.rst
+++ b/security/remember_me.rst
@@ -61,13 +61,13 @@ the session lasts using a cookie with the ``remember_me`` firewall option:
     .. code-block:: php
 
         // app/config/security.php
-        $container->loadFromExtension('security', array(
+        $container->loadFromExtension('security', [
             // ...
 
-            'firewalls' => array(
-                'main' => array(
+            'firewalls' => [
+                'main' => [
                     // ...
-                    'remember_me' => array(
+                    'remember_me' => [
                         'secret'   => '%secret%',
                         'lifetime' => 604800, // 1 week in seconds
                         'path'     => '/',
@@ -75,10 +75,10 @@ the session lasts using a cookie with the ``remember_me`` firewall option:
                         // checkbox in the login form (see below), uncomment
                         // the following line to always enable it.
                         //'always_remember_me' => true,
-                    ),
-                ),
-            ),
-        ));
+                    ],
+                ],
+            ],
+        ]);
 
 The ``remember_me`` firewall defines the following configuration options:
 
diff --git a/security/user_checkers.rst b/security/user_checkers.rst
index 85d9d2e3ebb..8bdca4a144e 100644
--- a/security/user_checkers.rst
+++ b/security/user_checkers.rst
@@ -105,15 +105,15 @@ is the service id of your user checker:
         // ...
         use AppBundle\Security\UserChecker;
 
-        $container->loadFromExtension('security', array(
-            'firewalls' => array(
-                'main' => array(
+        $container->loadFromExtension('security', [
+            'firewalls' => [
+                'main' => [
                     'pattern' => '^/',
                     'user_checker' => UserChecker::class,
                     // ...
-                ),
-            ),
-        ));
+                ],
+            ],
+        ]);
 
 .. tip::
 
diff --git a/security/voters.rst b/security/voters.rst
index 8ee1a1441da..f557ef07bd4 100644
--- a/security/voters.rst
+++ b/security/voters.rst
@@ -118,7 +118,7 @@ would look like this::
         protected function supports($attribute, $subject)
         {
             // if the attribute isn't one we support, return false
-            if (!in_array($attribute, array(self::VIEW, self::EDIT))) {
+            if (!in_array($attribute, [self::VIEW, self::EDIT])) {
                 return false;
             }
 
@@ -235,7 +235,7 @@ with ``ROLE_SUPER_ADMIN``::
             // ...
 
             // ROLE_SUPER_ADMIN can do anything! The power!
-            if ($this->decisionManager->decide($token, array('ROLE_SUPER_ADMIN'))) {
+            if ($this->decisionManager->decide($token, ['ROLE_SUPER_ADMIN'])) {
                 return true;
             }
 
@@ -317,9 +317,9 @@ security configuration:
     .. code-block:: php
 
         // app/config/security.php
-        $container->loadFromExtension('security', array(
-            'access_decision_manager' => array(
+        $container->loadFromExtension('security', [
+            'access_decision_manager' => [
                 'strategy' => 'unanimous',
                 'allow_if_all_abstain' => false,
-            ),
-        ));
+            ],
+        ]);
diff --git a/serializer.rst b/serializer.rst
index f747f945664..462c1c06e04 100644
--- a/serializer.rst
+++ b/serializer.rst
@@ -53,14 +53,14 @@ it in your configuration:
     .. code-block:: php
 
         // app/config/config.php
-        $container->loadFromExtension('framework', array(
+        $container->loadFromExtension('framework', [
             // ...
-            'serializer' => array(
+            'serializer' => [
                 'enable_annotations' => true,
                 // Alternatively, if you don't want to use annotations
                 //'enabled' => true,
-            ),
-        ));
+            ],
+        ]);
 
 Using the Serializer Service
 ----------------------------
@@ -202,19 +202,19 @@ with the following configuration:
     .. code-block:: php
 
         // app/config/config.php
-        $container->loadFromExtension('framework', array(
+        $container->loadFromExtension('framework', [
             // ...
-            'serializer' => array(
+            'serializer' => [
                 'enable_annotations' => true,
-            ),
-        ));
+            ],
+        ]);
 
 Next, add the :ref:`@Groups annotations <component-serializer-attributes-groups-annotations>`
 to your class and choose which groups to use when serializing::
 
     $json = $serializer->serialize(
         $someObject,
-        'json', array('groups' => array('group1'))
+        'json', ['groups' => ['group1']]
     );
 
 In addition to the ``@Groups`` annotation, the Serializer component also
@@ -268,12 +268,12 @@ value:
     .. code-block:: php
 
         // app/config/config.php
-        $container->loadFromExtension('framework', array(
+        $container->loadFromExtension('framework', [
             // ...
-            'serializer' => array(
+            'serializer' => [
                 'name_converter' => 'serializer.name_converter.camel_case_to_snake_case',
-            ),
-        ));
+            ],
+        ]);
 
 Going Further with the Serializer
 ---------------------------------
diff --git a/serializer/custom_encoders.rst b/serializer/custom_encoders.rst
index 9403ee7f265..e3436c9cdec 100644
--- a/serializer/custom_encoders.rst
+++ b/serializer/custom_encoders.rst
@@ -27,7 +27,7 @@ create your own encoder that uses the
 
     class YamlEncoder implements EncoderInterface, DecoderInterface
     {
-        public function encode($data, $format, array $context = array())
+        public function encode($data, $format, array $context = [])
         {
             return Yaml::dump($data);
         }
@@ -37,7 +37,7 @@ create your own encoder that uses the
             return 'yaml' === $format;
         }
 
-        public function decode($data, $format, array $context = array())
+        public function decode($data, $format, array $context = [])
         {
             return Yaml::parse($data);
         }
diff --git a/serializer/custom_normalizer.rst b/serializer/custom_normalizer.rst
index 4a0cd137f03..b82b61e8e07 100644
--- a/serializer/custom_normalizer.rst
+++ b/serializer/custom_normalizer.rst
@@ -35,14 +35,14 @@ to customize the normalized data. To do that, leverage the ``ObjectNormalizer``:
             $this->normalizer = $normalizer;
         }
 
-        public function normalize($topic, $format = null, array $context = array())
+        public function normalize($topic, $format = null, array $context = [])
         {
             $data = $this->normalizer->normalize($topic, $format, $context);
 
             // Here, add, edit, or delete some data:
-            $data['href']['self'] = $this->router->generate('topic_show', array(
+            $data['href']['self'] = $this->router->generate('topic_show', [
                 'id' => $topic->getId(),
-            ), UrlGeneratorInterface::ABSOLUTE_URL);
+            ], UrlGeneratorInterface::ABSOLUTE_URL);
 
             return $data;
         }
diff --git a/serializer/encoders.rst b/serializer/encoders.rst
index 4f996055db5..5499394e31f 100644
--- a/serializer/encoders.rst
+++ b/serializer/encoders.rst
@@ -17,8 +17,8 @@ You can add new encoders to a Serializer instance by using its second constructo
     use Symfony\Component\Serializer\Encoder\XmlEncoder;
     use Symfony\Component\Serializer\Encoder\JsonEncoder;
 
-    $encoders = array(new XmlEncoder(), new JsonEncoder());
-    $serializer = new Serializer(array(), $encoders);
+    $encoders = [new XmlEncoder(), new JsonEncoder()];
+    $serializer = new Serializer([], $encoders);
 
 Built-in Encoders
 -----------------
@@ -49,7 +49,7 @@ This encoder transforms arrays into XML and vice versa.
 
 For example, take an object normalized as following::
 
-    array('foo' => array(1, 2), 'bar' => true);
+    ['foo' => [1, 2], 'bar' => true];
 
 The ``XmlEncoder`` will encode this object like that::
 
@@ -63,7 +63,7 @@ The ``XmlEncoder`` will encode this object like that::
 Be aware that this encoder will consider keys beginning with ``@`` as attributes::
 
     $encoder = new XmlEncoder();
-    $encoder->encode(array('foo' => array('@bar' => 'value')));
+    $encoder->encode(['foo' => ['@bar' => 'value']]);
     // will return:
     // <?xml version="1.0"?>
     // <response>
diff --git a/serializer/normalizers.rst b/serializer/normalizers.rst
index 958cc449087..e38d29578ae 100644
--- a/serializer/normalizers.rst
+++ b/serializer/normalizers.rst
@@ -15,7 +15,7 @@ Normalizers are enabled in the serializer passing them as its first argument::
     use Symfony\Component\Serializer\Serializer;
     use Symfony\Component\Serializer\Normalizer\ObjectNormalizer;
 
-    $normalizers = array(new ObjectNormalizer());
+    $normalizers = [new ObjectNormalizer()];
     $serializer = new Serializer($normalizers);
 
 Built-in Normalizers
diff --git a/service_container.rst b/service_container.rst
index a80dc386094..393816c9e33 100644
--- a/service_container.rst
+++ b/service_container.rst
@@ -760,11 +760,11 @@ You can also use the ``bind`` keyword to bind specific arguments by name or type
 
         $container->register(LuckyController::class)
             ->setPublic(true)
-            ->setBindings(array(
+            ->setBindings([
                 '$adminEmail' => 'manager@example.com',
                 '$requestLogger' => new Reference('monolog.logger.request'),
                 LoggerInterface::class => new Reference('monolog.logger.request'),
-            ))
+            ])
         ;
 
 By putting the ``bind`` key under ``_defaults``, you can specify the value of *any*
@@ -1150,19 +1150,19 @@ admin email. In this case, each needs to have a unique service id:
 
         $container->register('site_update_manager.superadmin', SiteUpdateManager::class)
             ->setAutowired(false)
-            ->setArguments(array(
+            ->setArguments([
                 new Reference(MessageGenerator::class),
                 new Reference('mailer'),
                 'superadmin@example.com'
-            ));
+            ]);
 
         $container->register('site_update_manager.normal_users', SiteUpdateManager::class)
             ->setAutowired(false)
-            ->setArguments(array(
+            ->setArguments([
                 new Reference(MessageGenerator::class),
                 new Reference('mailer'),
                 'contact@example.com'
-            ));
+            ]);
 
         $container->setAlias(SiteUpdateManager::class, 'site_update_manager.superadmin')
 
diff --git a/service_container/3.3-di-changes.rst b/service_container/3.3-di-changes.rst
index 7adac95fccc..a31e4e4e340 100644
--- a/service_container/3.3-di-changes.rst
+++ b/service_container/3.3-di-changes.rst
@@ -221,7 +221,7 @@ service as an argument to another with the following config:
 
         $container->register('app.invoice_generator', InvoiceGenerator::class);
         $container->register('app.invoice_mailer', InvoiceMailer::class)
-            ->setArguments(array(new Reference('app.invoice_generator')));
+            ->setArguments([new Reference('app.invoice_generator')]);
 
 To pass the ``InvoiceGenerator`` as an argument to ``InvoiceMailer``, you needed
 to specify the service's *id* as an argument: ``app.invoice_generator``. Service
diff --git a/service_container/calls.rst b/service_container/calls.rst
index 85fc04571d3..36160a263d2 100644
--- a/service_container/calls.rst
+++ b/service_container/calls.rst
@@ -70,4 +70,4 @@ To configure the container to call the ``setLogger`` method, use the ``calls`` k
         use Symfony\Component\DependencyInjection\Reference;
 
         $container->register(MessageGenerator::class)
-            ->addMethodCall('setLogger', array(new Reference('logger')));
+            ->addMethodCall('setLogger', [new Reference('logger')]);
diff --git a/service_container/configurators.rst b/service_container/configurators.rst
index acbdfc56636..c45269ebe64 100644
--- a/service_container/configurators.rst
+++ b/service_container/configurators.rst
@@ -68,7 +68,7 @@ in the application::
         public function getEnabledFormatters()
         {
             // code to configure which formatters to use
-            $enabledFormatters = array(...);
+            $enabledFormatters = [...];
 
             // ...
 
@@ -179,10 +179,10 @@ all the classes are already loaded as services. All you need to do is specify th
         $this->registerClasses($definition, 'AppBundle\\', '../../src/AppBundle/*');
 
         $container->getDefinition(NewsletterManager::class)
-            ->setConfigurator(array(new Reference(EmailConfigurator::class), 'configure'));
+            ->setConfigurator([new Reference(EmailConfigurator::class), 'configure']);
 
         $container->getDefinition(GreetingCardManager::class)
-            ->setConfigurator(array(new Reference(EmailConfigurator::class), 'configure'));
+            ->setConfigurator([new Reference(EmailConfigurator::class), 'configure']);
 
 .. versionadded:: 3.2
 
diff --git a/service_container/definitions.rst b/service_container/definitions.rst
index 94c747d5cf4..f2987a3e054 100644
--- a/service_container/definitions.rst
+++ b/service_container/definitions.rst
@@ -79,10 +79,10 @@ fetched from the container::
     use Symfony\Component\DependencyInjection\Definition;
     use Symfony\Component\DependencyInjection\Reference;
 
-    $definition = new Definition(DoctrineConfigManager::class, array(
+    $definition = new Definition(DoctrineConfigManager::class, [
         new Reference('doctrine'), // a reference to another service
         '%app.config_table_name%',  // will be resolved to the value of a container parameter
-    ));
+    ]);
 
     // gets all arguments configured for this definition
     $constructorArguments = $definition->getArguments();
@@ -115,7 +115,7 @@ any method calls in the definitions as well::
     $methodCalls = $definition->getMethodCalls();
 
     // configures a new method call
-    $definition->addMethodCall('setLogger', array(new Reference('logger')));
+    $definition->addMethodCall('setLogger', [new Reference('logger')]);
 
     // replaces all previously configured method calls with the passed array
     $definition->setMethodCalls($methodCalls);
diff --git a/service_container/factories.rst b/service_container/factories.rst
index ecff68e9229..4a0dd0439a4 100644
--- a/service_container/factories.rst
+++ b/service_container/factories.rst
@@ -80,7 +80,7 @@ configure the service container to use the
 
         $container->register(NewsletterManager::class, NewsletterManager::class)
             // call the static method
-            ->setFactory(array(NewsletterManagerStaticFactory::class, 'createNewsletterManager'));
+            ->setFactory([NewsletterManagerStaticFactory::class, 'createNewsletterManager']);
 
 .. note::
 
@@ -149,10 +149,10 @@ Configuration of the service container then looks like this:
 
         $container->register(NewsletterManager::class, NewsletterManager::class)
             // call a method on the specified factory service
-            ->setFactory(array(
+            ->setFactory([
                 new Reference(NewsletterManagerFactory::class),
                 'createNewsletterManager',
-            ));
+            ]);
 
 .. note::
 
@@ -230,7 +230,7 @@ example takes the ``templating`` service as an argument:
         // ...
         $container->register(NewsletterManager::class, NewsletterManager::class)
             ->addArgument(new Reference('templating'))
-            ->setFactory(array(
+            ->setFactory([
                 new Reference(NewsletterManagerFactory::class),
                 'createNewsletterManager',
-            ));
+            ]);
diff --git a/service_container/injection_types.rst b/service_container/injection_types.rst
index d2afc93b044..e51d7a09230 100644
--- a/service_container/injection_types.rst
+++ b/service_container/injection_types.rst
@@ -154,7 +154,7 @@ that accepts the dependency::
 
         // ...
         $container->register('app.newsletter_manager', NewsletterManager::class)
-            ->addMethodCall('setMailer', array(new Reference('mailer')));
+            ->addMethodCall('setMailer', [new Reference('mailer')]);
 
 This time the advantages are:
 
diff --git a/service_container/optional_dependencies.rst b/service_container/optional_dependencies.rst
index 3148bd30c47..2e56afccc29 100644
--- a/service_container/optional_dependencies.rst
+++ b/service_container/optional_dependencies.rst
@@ -102,12 +102,12 @@ call if the service exists and remove the method call if it does not:
 
         $container
             ->register(NewsletterManager::class)
-            ->addMethodCall('setLogger', array(
+            ->addMethodCall('setLogger', [
                 new Reference(
                     'logger',
                     ContainerInterface::IGNORE_ON_INVALID_REFERENCE
                 ),
-            ))
+            ])
         ;
 
 .. note::
diff --git a/service_container/parameters.rst b/service_container/parameters.rst
index 363418f0f22..24186127219 100644
--- a/service_container/parameters.rst
+++ b/service_container/parameters.rst
@@ -231,11 +231,11 @@ for all parameters that are arrays.
 
     .. code-block:: php
 
-        $container->setParameter('my_mailer.gateways', array('mail1', 'mail2', 'mail3'));
-        $container->setParameter('my_multilang.language_fallback', array(
-            'en' => array('en', 'fr'),
-            'fr' => array('fr', 'en'),
-        ));
+        $container->setParameter('my_mailer.gateways', ['mail1', 'mail2', 'mail3']);
+        $container->setParameter('my_multilang.language_fallback', [
+            'en' => ['en', 'fr'],
+            'fr' => ['fr', 'en'],
+        ]);
 
 Environment Variables and Dynamic Values
 ----------------------------------------
diff --git a/service_container/parent_services.rst b/service_container/parent_services.rst
index fa8894d263f..b0172da052a 100644
--- a/service_container/parent_services.rst
+++ b/service_container/parent_services.rst
@@ -123,7 +123,7 @@ duplicated service definitions:
         $container->register(BaseDoctrineRepository::class)
             ->setAbstract(true)
             ->addArgument(new Reference('doctrine.orm.entity_manager'))
-            ->addMethodCall('setLogger', array(new Reference('logger')))
+            ->addMethodCall('setLogger', [new Reference('logger')])
         ;
 
         // extend the AppBundle\Repository\BaseDoctrineRepository service
diff --git a/service_container/service_subscribers_locators.rst b/service_container/service_subscribers_locators.rst
index a170c08bf54..546a87c7989 100644
--- a/service_container/service_subscribers_locators.rst
+++ b/service_container/service_subscribers_locators.rst
@@ -235,7 +235,7 @@ service type to a service.
 
         $container
             ->register(CommandBus::class)
-            ->addTag('container.service_subscriber', array('key' => 'logger', 'id' => 'monolog.logger.event'))
+            ->addTag('container.service_subscriber', ['key' => 'logger', 'id' => 'monolog.logger.event'])
         ;
 
 .. tip::
@@ -296,10 +296,10 @@ include as many services as needed in it.
         $container
             ->register('app.command_handler_locator', ServiceLocator::class)
             ->addTag('container.service_locator')
-            ->setArguments(array(array(
+            ->setArguments([[
                 'AppBundle\FooCommand' => new Reference('app.command_handler.foo'),
                 'AppBundle\BarCommand' => new Reference('app.command_handler.bar'),
-            )))
+            ]])
         ;
 
 .. note::
@@ -343,7 +343,7 @@ Now you can use the service locator by injecting it in any other service:
 
         $container
             ->register(CommandBus::class)
-            ->setArguments(array(new Reference('app.command_handler_locator')))
+            ->setArguments([new Reference('app.command_handler_locator')])
         ;
 
 In :doc:`compiler passes </service_container/compiler_passes>` it's recommended
@@ -358,10 +358,10 @@ will share identical locators amongst all the services referencing them::
     {
         //...
 
-        $locateableServices = array(
+        $locateableServices = [
             //...
             'logger' => new Reference('logger'),
-        );
+        ];
 
         $myService->addArgument(ServiceLocatorTagPass::register($container, $locateableServices));
     }
diff --git a/service_container/tags.rst b/service_container/tags.rst
index 480b1ce6cd7..82fb4960076 100644
--- a/service_container/tags.rst
+++ b/service_container/tags.rst
@@ -144,7 +144,7 @@ To begin with, define the ``TransportChain`` class::
 
         public function __construct()
         {
-            $this->transports = array();
+            $this->transports = [];
         }
 
         public function addTransport(\Swift_Transport $transport)
@@ -266,7 +266,7 @@ container for any services with the ``app.mail_transport`` tag::
 
             foreach ($taggedServices as $id => $tags) {
                 // add the transport service to the TransportChain service
-                $definition->addMethodCall('addTransport', array(new Reference($id)));
+                $definition->addMethodCall('addTransport', [new Reference($id)]);
             }
         }
     }
@@ -314,7 +314,7 @@ To begin with, change the ``TransportChain`` class::
 
         public function __construct()
         {
-            $this->transports = array();
+            $this->transports = [];
         }
 
         public function addTransport(\Swift_Transport $transport, $alias)
@@ -375,10 +375,10 @@ To answer this, change the service declaration:
 
         $container->register(\Swift_SmtpTransport::class)
             ->addArgument('%mailer_host%')
-            ->addTag('app.mail_transport', array('alias' => 'foo'));
+            ->addTag('app.mail_transport', ['alias' => 'foo']);
 
         $container->register(\Swift_SendmailTransport::class)
-            ->addTag('app.mail_transport', array('alias' => 'bar'));
+            ->addTag('app.mail_transport', ['alias' => 'bar']);
 
 .. tip::
 
@@ -423,10 +423,10 @@ use this, update the compiler::
 
                 // a service could have the same tag twice
                 foreach ($tags as $attributes) {
-                    $definition->addMethodCall('addTransport', array(
+                    $definition->addMethodCall('addTransport', [
                         new Reference($id),
                         $attributes["alias"]
-                    ));
+                    ]);
                 }
             }
         }
@@ -557,6 +557,6 @@ application handlers.
 
             // app/config/services.php
             $container->register(AppBundle\Handler\One::class)
-                ->addTag('app.handler', array('priority' => 20));
+                ->addTag('app.handler', ['priority' => 20]);
 
     Note that any other custom attributes will be ignored by this feature.
diff --git a/session/locale_sticky_session.rst b/session/locale_sticky_session.rst
index 60e8cce8e39..9e207531467 100644
--- a/session/locale_sticky_session.rst
+++ b/session/locale_sticky_session.rst
@@ -51,10 +51,10 @@ correct locale however you want::
 
         public static function getSubscribedEvents()
         {
-            return array(
+            return [
                 // must be registered before (i.e. with a higher priority than) the default Locale listener
-                KernelEvents::REQUEST => array(array('onKernelRequest', 20)),
-            );
+                KernelEvents::REQUEST => [['onKernelRequest', 20]],
+            ];
         }
     }
 
@@ -172,9 +172,9 @@ event::
 
         public static function getSubscribedEvents()
         {
-            return array(
+            return [
                 SecurityEvents::INTERACTIVE_LOGIN => 'onInteractiveLogin',
-            );
+            ];
         }
     }
 
diff --git a/session/php_bridge.rst b/session/php_bridge.rst
index 3ebc74461ae..a52d5ca4779 100644
--- a/session/php_bridge.rst
+++ b/session/php_bridge.rst
@@ -38,12 +38,12 @@ for the ``handler_id``:
 
     .. code-block:: php
 
-        $container->loadFromExtension('framework', array(
-            'session' => array(
+        $container->loadFromExtension('framework', [
+            'session' => [
                 'storage_id' => 'session.storage.php_bridge',
                 'handler_id' => null,
-            ),
-        ));
+            ],
+        ]);
 
 Otherwise, if the problem is simply that you cannot avoid the application
 starting the session with ``session_start()``, you can still make use of
@@ -77,12 +77,12 @@ the example below:
 
     .. code-block:: php
 
-        $container->loadFromExtension('framework', array(
-            'session' => array(
+        $container->loadFromExtension('framework', [
+            'session' => [
                 'storage_id' => 'session.storage.php_bridge',
                 'handler_id' => 'session.storage.native_file',
-            ),
-        ));
+            ],
+        ]);
 
 .. note::
 
diff --git a/session/proxy_examples.rst b/session/proxy_examples.rst
index 4016c359c84..ee768161e7f 100644
--- a/session/proxy_examples.rst
+++ b/session/proxy_examples.rst
@@ -46,13 +46,13 @@ Symfony to use your session handler instead of the default one:
 
         // app/config/config.php
         use AppBundle\Session\CustomSessionHandler;
-        $container->loadFromExtension('framework', array(
+        $container->loadFromExtension('framework', [
             // ...
-            'session' => array(
+            'session' => [
                 // ...
                 'handler_id' => CustomSessionHandler::class,
-            ),
-        ));
+            ],
+        ]);
 
 Keep reading the next sections to learn how to use the session handlers in practice
 to solve two common use cases: encrypt session information and define readonly
diff --git a/session/sessions_directory.rst b/session/sessions_directory.rst
index c1b91f5472f..53cc77cd0be 100644
--- a/session/sessions_directory.rst
+++ b/session/sessions_directory.rst
@@ -37,12 +37,12 @@ this path, update the ``framework.session.save_path`` configuration key:
     .. code-block:: php
 
         // app/config/config.php
-        $container->loadFromExtension('framework', array(
-            'session' => array(
+        $container->loadFromExtension('framework', [
+            'session' => [
                 'handler_id' => 'session.handler.native_file',
                 'save_path' => '%kernel.project_dir%/var/sessions/%kernel.environment%'
-            ),
-        ));
+            ],
+        ]);
 
 Storing Sessions Elsewhere (e.g. database)
 ------------------------------------------
diff --git a/setup/built_in_web_server.rst b/setup/built_in_web_server.rst
index 40763e1ed4f..73fcd7ac4b6 100644
--- a/setup/built_in_web_server.rst
+++ b/setup/built_in_web_server.rst
@@ -36,9 +36,9 @@ Then, enable the bundle in the kernel of the application::
     {
         public function registerBundles()
         {
-            $bundles = array(
+            $bundles = [
                 // ...
-            );
+            ];
 
             if ('dev' === $this->getEnvironment()) {
                 // ...
diff --git a/templating.rst b/templating.rst
index 0b4261a9b44..795eef4439f 100644
--- a/templating.rst
+++ b/templating.rst
@@ -533,9 +533,9 @@ configuration:
         use Symfony\Component\Routing\RouteCollection;
 
         $routes = new RouteCollection();
-        $routes->add('welcome', new Route('/', array(
+        $routes->add('welcome', new Route('/', [
             '_controller' => 'AppBundle:Welcome:index',
-        )));
+        ]));
 
         return $routes;
 
@@ -596,9 +596,9 @@ route:
         use Symfony\Component\Routing\RouteCollection;
 
         $routes = new RouteCollection();
-        $routes->add('article_show', new Route('/article/{slug}', array(
+        $routes->add('article_show', new Route('/article/{slug}', [
             '_controller' => 'AppBundle:Article:show',
-        )));
+        ]));
 
         return $routes;
 
diff --git a/templating/PHP.rst b/templating/PHP.rst
index dbcd62d547f..7b6291a6026 100644
--- a/templating/PHP.rst
+++ b/templating/PHP.rst
@@ -53,12 +53,12 @@ your application configuration file:
 
     .. code-block:: php
 
-        $container->loadFromExtension('framework', array(
+        $container->loadFromExtension('framework', [
             // ...
-            'templating' => array(
-                'engines' => array('twig', 'php'),
-            ),
-        ));
+            'templating' => [
+                'engines' => ['twig', 'php'],
+            ],
+        ]);
 
 You can now render a PHP template instead of a Twig one simply by using the
 ``.php`` extension in the template name instead of ``.twig``. The controller
@@ -71,7 +71,7 @@ below renders the ``index.html.php`` template::
     {
         return $this->render(
             'AppBundle:Hello:index.html.php',
-            array('name' => $name)
+            ['name' => $name]
         );
     }
 
@@ -88,7 +88,7 @@ You can also use the `@Template`_ shortcut to render the default
      */
     public function indexAction($name)
     {
-        return array('name' => $name);
+        return ['name' => $name];
     }
 
 .. caution::
@@ -247,7 +247,7 @@ And change the ``index.html.php`` template to include it:
     <!-- app/Resources/views/Hello/index.html.php -->
     <?php $view->extend('AppBundle::layout.html.php') ?>
 
-    <?= $view->render('AppBundle:Hello:hello.html.php', array('name' => $name)) ?>
+    <?= $view->render('AppBundle:Hello:hello.html.php', ['name' => $name]) ?>
 
 The ``render()`` method evaluates and returns the content of another template
 (this is the exact same method as the one used in the controller).
@@ -269,10 +269,10 @@ If you create a ``fancy`` action, and want to include it into the
 
     <!-- app/Resources/views/Hello/index.html.php -->
     <?= $view['actions']->render(
-        new \Symfony\Component\HttpKernel\Controller\ControllerReference('AppBundle:Hello:fancy', array(
+        new \Symfony\Component\HttpKernel\Controller\ControllerReference('AppBundle:Hello:fancy', [
             'name'  => $name,
             'color' => 'green',
-        ))
+        ])
     ) ?>
 
 Here, the ``AppBundle:Hello:fancy`` string refers to the ``fancy`` action of the
@@ -287,10 +287,10 @@ Here, the ``AppBundle:Hello:fancy`` string refers to the ``fancy`` action of the
             // create some object, based on the $color variable
             $object = ...;
 
-            return $this->render('AppBundle:Hello:fancy.html.php', array(
+            return $this->render('AppBundle:Hello:fancy.html.php', [
                 'name'   => $name,
                 'object' => $object,
-            ));
+            ]);
         }
 
         // ...
@@ -320,7 +320,7 @@ updated by changing the configuration:
 
 .. code-block:: html+php
 
-    <a href="<?= $view['router']->path('hello', array('name' => 'Thomas')) ?>">
+    <a href="<?= $view['router']->path('hello', ['name' => 'Thomas']) ?>">
         Greet Thomas!
     </a>
 
@@ -399,7 +399,7 @@ file in order to customize the ``integer_widget`` fragment.
         <?= $view['form']->block(
             $form,
             'form_widget_simple',
-            array('type' => isset($type) ? $type : "number")
+            ['type' => isset($type) ? $type : "number"]
         ) ?>
     </div>
 
@@ -407,7 +407,7 @@ Now that you've created the customized form template, you need to tell Symfony
 to use it. Inside the template where you're actually rendering your form,
 tell Symfony to use the theme via the ``setTheme()`` helper method::
 
-    <?php $view['form']->setTheme($form, array(':form')) ?>
+    <?php $view['form']->setTheme($form, [':form']) ?>
 
     <?php $view['form']->widget($form['age']) ?>
 
@@ -476,17 +476,17 @@ form is rendered.
 
         // app/config/config.php
         // PHP
-        $container->loadFromExtension('framework', array(
-            'templating' => array(
-                'form' => array(
-                    'resources' => array(
+        $container->loadFromExtension('framework', [
+            'templating' => [
+                'form' => [
+                    'resources' => [
                         'AppBundle:Form',
-                    ),
-                ),
-             ),
+                    ],
+                ],
+             ],
 
              // ...
-        ));
+        ]);
 
 By default, the PHP engine uses a *div* layout when rendering forms. Some people,
 however, may prefer to render forms in a *table* layout. Use the ``FrameworkBundle:FormTable``
@@ -528,24 +528,24 @@ resource to use such a layout:
     .. code-block:: php
 
         // app/config/config.php
-        $container->loadFromExtension('framework', array(
-            'templating' => array(
-                'form' => array(
-                    'resources' => array(
+        $container->loadFromExtension('framework', [
+            'templating' => [
+                'form' => [
+                    'resources' => [
                         'FrameworkBundle:FormTable',
-                    ),
-                ),
-            ),
+                    ],
+                ],
+            ],
 
              // ...
-        ));
+        ]);
 
 If you only want to make the change in one template, add the following line to
 your template file rather than adding the template as a resource:
 
 .. code-block:: html+php
 
-    <?php $view['form']->setTheme($form, array('FrameworkBundle:FormTable')) ?>
+    <?php $view['form']->setTheme($form, ['FrameworkBundle:FormTable']) ?>
 
 Note that the ``$form`` variable in the above code is the form view variable
 that you passed to your template.
@@ -567,7 +567,7 @@ original template:
     <?php if ($required) { $label_attr['class'] = trim((isset($label_attr['class']) ? $label_attr['class'] : '').' required'); } ?>
     <?php if (!$compound) { $label_attr['for'] = $id; } ?>
     <?php if (!$label) { $label = $view['form']->humanize($name); } ?>
-    <label <?php foreach ($label_attr as $k => $v) { printf('%s="%s" ', $view->escape($k), $view->escape($v)); } ?>><?= $view->escape($view['translator']->trans($label, array(), $translation_domain)) ?></label>
+    <label <?php foreach ($label_attr as $k => $v) { printf('%s="%s" ', $view->escape($k), $view->escape($v)); } ?>><?= $view->escape($view['translator']->trans($label, [], $translation_domain)) ?></label>
 
     <!-- customization -->
     <?php if ($required) : ?>
diff --git a/templating/embedding_controllers.rst b/templating/embedding_controllers.rst
index f5af066556d..9f4207dc2c1 100644
--- a/templating/embedding_controllers.rst
+++ b/templating/embedding_controllers.rst
@@ -41,7 +41,7 @@ First, create a controller that renders a certain number of recent articles::
 
             return $this->render(
                 'article/recent_list.html.twig',
-                array('articles' => $articles)
+                ['articles' => $articles]
             );
         }
     }
diff --git a/templating/formats.rst b/templating/formats.rst
index ec2d378fbc9..aab13d049f4 100644
--- a/templating/formats.rst
+++ b/templating/formats.rst
@@ -37,9 +37,9 @@ pattern is to do the following::
 
             $format = $request->getRequestFormat();
 
-            return $this->render('article/show.'.$format.'.twig', array(
+            return $this->render('article/show.'.$format.'.twig', [
                 'article' => $article,
-            ));
+            ]);
         }
     }
 
diff --git a/templating/global_variables.rst b/templating/global_variables.rst
index bb7985c714c..03cfe2f7fd0 100644
--- a/templating/global_variables.rst
+++ b/templating/global_variables.rst
@@ -38,12 +38,12 @@ This is possible inside your ``app/config/config.yml`` file:
     .. code-block:: php
 
         // app/config/config.php
-        $container->loadFromExtension('twig', array(
+        $container->loadFromExtension('twig', [
              // ...
-             'globals' => array(
+             'globals' => [
                  'ga_tracking' => 'UA-xxxxx-x',
-             ),
-        ));
+             ],
+        ]);
 
 Now, the variable ``ga_tracking`` is available in all Twig templates:
 
@@ -94,11 +94,11 @@ system, which lets you isolate or reuse the value:
     .. code-block:: php
 
         // app/config/config.php
-        $container->loadFromExtension('twig', array(
-             'globals' => array(
+        $container->loadFromExtension('twig', [
+             'globals' => [
                  'ga_tracking' => '%ga_tracking%',
-             ),
-        ));
+             ],
+        ]);
 
 The same variable is available exactly as before.
 
@@ -150,9 +150,9 @@ This should feel familiar, as it's the same syntax you use in service configurat
     .. code-block:: php
 
         // app/config/config.php
-        $container->loadFromExtension('twig', array(
+        $container->loadFromExtension('twig', [
              // ...
-             'globals' => array(
+             'globals' => [
                  'user_management' => '@AppBundle\Service\UserManagement',
-             ),
-        ));
+             ],
+        ]);
diff --git a/templating/hinclude.rst b/templating/hinclude.rst
index d9a77e2c8eb..8bdd0bbef65 100644
--- a/templating/hinclude.rst
+++ b/templating/hinclude.rst
@@ -52,10 +52,10 @@ tags:
         .. code-block:: php
 
             // app/config/config.php
-            $container->loadFromExtension('framework', array(
+            $container->loadFromExtension('framework', [
                 // ...
-                'fragments' => array('path' => '/_fragment'),
-            ));
+                'fragments' => ['path' => '/_fragment'],
+            ]);
 
 Default content (while loading or if JavaScript is disabled) can be set globally
 in your application configuration:
@@ -90,14 +90,14 @@ in your application configuration:
     .. code-block:: php
 
         // app/config/config.php
-        $container->loadFromExtension('framework', array(
+        $container->loadFromExtension('framework', [
             // ...
-            'templating' => array(
-                'hinclude_default_template' => array(
+            'templating' => [
+                'hinclude_default_template' => [
                     'hinclude.html.twig',
-                ),
-            ),
-        ));
+                ],
+            ],
+        ]);
 
 You can define default templates per ``render()`` function (which will override
 any global default template that is defined):
diff --git a/templating/namespaced_paths.rst b/templating/namespaced_paths.rst
index 8c191ad4b2e..cf464a11fa4 100644
--- a/templating/namespaced_paths.rst
+++ b/templating/namespaced_paths.rst
@@ -61,11 +61,11 @@ directory:
     .. code-block:: php
 
         // app/config/config.php
-        $container->loadFromExtension('twig', array(
-            'paths' => array(
+        $container->loadFromExtension('twig', [
+            'paths' => [
                 '%kernel.project_dir%/vendor/acme/foo-bar/templates' => 'foo_bar',
-            ),
-        ));
+            ],
+        ]);
 
 The registered namespace is called ``foo_bar``, which refers to the
 ``vendor/acme/foo-bar/templates`` directory. Assuming there's a file
@@ -116,13 +116,13 @@ specific template doesn't exist.
     .. code-block:: php
 
         // app/config/config.php
-        $container->loadFromExtension('twig', array(
-            'paths' => array(
+        $container->loadFromExtension('twig', [
+            'paths' => [
                 '%kernel.project_dir%/vendor/acme/themes/theme1' => 'theme',
                 '%kernel.project_dir%/vendor/acme/themes/theme2' => 'theme',
                 '%kernel.project_dir%/vendor/acme/themes/common' => 'theme',
-            ),
-        ));
+            ],
+        ]);
 
 Now, you can use the same ``@theme`` namespace to refer to any template located
 in the previous three directories:
diff --git a/templating/render_without_controller.rst b/templating/render_without_controller.rst
index 37c7967b4d0..ac0dedd6ad0 100644
--- a/templating/render_without_controller.rst
+++ b/templating/render_without_controller.rst
@@ -43,10 +43,10 @@ can do this without creating a controller:
         use Symfony\Component\Routing\Route;
 
         $routes = new RouteCollection();
-        $routes->add('acme_privacy', new Route('/privacy', array(
+        $routes->add('acme_privacy', new Route('/privacy', [
             '_controller' => 'FrameworkBundle:Template:template',
             'template'    => 'static/privacy.html.twig',
-        )));
+        ]));
 
         return $routes;
 
@@ -105,12 +105,12 @@ other variables in your route, you can control exactly how your page is cached:
         use Symfony\Component\Routing\Route;
 
         $routes = new RouteCollection();
-        $routes->add('acme_privacy', new Route('/privacy', array(
+        $routes->add('acme_privacy', new Route('/privacy', [
             '_controller' => 'FrameworkBundle:Template:template',
             'template'    => 'static/privacy.html.twig',
             'maxAge'      => 86400,
             'sharedAge'   => 86400,
-        )));
+        ]));
 
         return $routes;
 
diff --git a/templating/twig_extension.rst b/templating/twig_extension.rst
index 0d553982d8a..0ae7b8fcf83 100644
--- a/templating/twig_extension.rst
+++ b/templating/twig_extension.rst
@@ -33,9 +33,9 @@ Create a class that extends ``AbstractExtension`` and fill in the logic::
     {
         public function getFilters()
         {
-            return array(
-                new TwigFilter('price', array($this, 'formatPrice')),
-            );
+            return [
+                new TwigFilter('price', [$this, 'formatPrice']),
+            ];
         }
 
         public function formatPrice($number, $decimals = 0, $decPoint = '.', $thousandsSep = ',')
@@ -67,9 +67,9 @@ Here's how to create a custom **function**::
     {
         public function getFunctions()
         {
-            return array(
-                new TwigFunction('area', array($this, 'calculateArea')),
-            );
+            return [
+                new TwigFunction('area', [$this, 'calculateArea']),
+            ];
         }
 
         public function calculateArea(int $width, int $length)
@@ -125,10 +125,10 @@ callable defined in ``getFilters()``::
     {
         public function getFilters()
         {
-            return array(
+            return [
                 // the logic of this filter is now implemented in a different class
-                new TwigFilter('price', array(AppRuntime::class, 'priceFilter')),
-            );
+                new TwigFilter('price', [AppRuntime::class, 'priceFilter']),
+            ];
         }
     }
 
diff --git a/testing.rst b/testing.rst
index 065cf9fe4bc..078315b0229 100644
--- a/testing.rst
+++ b/testing.rst
@@ -327,12 +327,12 @@ to associate both methods::
 
     public function provideUrls()
     {
-        return array(
-            array('/'),
-            array('/blog'),
-            array('/contact'),
+        return [
+            ['/'],
+            ['/blog'],
+            ['/contact'],
             // ...
-        );
+        ];
     }
 
 .. index::
@@ -364,9 +364,9 @@ returns a ``Crawler`` instance.
         request(
             $method,
             $uri,
-            array $parameters = array(),
-            array $files = array(),
-            array $server = array(),
+            array $parameters = [],
+            array $files = [],
+            array $server = [],
             $content = null,
             $changeHistory = true
         )
@@ -379,13 +379,13 @@ returns a ``Crawler`` instance.
         $client->request(
             'GET',
             '/post/hello-world',
-            array(),
-            array(),
-            array(
+            [],
+            [],
+            [
                 'CONTENT_TYPE'          => 'application/json',
                 'HTTP_REFERER'          => '/foo/bar',
                 'HTTP_X-Requested-With' => 'XMLHttpRequest',
-            )
+            ]
         );
 
 Use the crawler to find DOM elements in the response. These elements can then
@@ -395,7 +395,7 @@ be used to click on links and submit forms::
     $crawler = $client->click($link);
 
     $form = $crawler->selectButton('validate')->form();
-    $crawler = $client->submit($form, array('name' => 'Fabien'));
+    $crawler = $client->submit($form, ['name' => 'Fabien']);
 
 The ``click()`` and ``submit()`` methods both return a ``Crawler`` object.
 These methods are the best way to browse your application as it takes care
@@ -411,15 +411,15 @@ The ``request()`` method can also be used to simulate form submissions directly
 or perform more complex requests. Some useful examples::
 
     // submits a form directly (but using the Crawler is easier!)
-    $client->request('POST', '/submit', array('name' => 'Fabien'));
+    $client->request('POST', '/submit', ['name' => 'Fabien']);
 
     // submits a raw JSON string in the request body
     $client->request(
         'POST',
         '/submit',
-        array(),
-        array(),
-        array('CONTENT_TYPE' => 'application/json'),
+        [],
+        [],
+        ['CONTENT_TYPE' => 'application/json'],
         '{"name":"Fabien"}'
     );
 
@@ -435,17 +435,17 @@ or perform more complex requests. Some useful examples::
     $client->request(
         'POST',
         '/submit',
-        array('name' => 'Fabien'),
-        array('photo' => $photo)
+        ['name' => 'Fabien'],
+        ['photo' => $photo]
     );
 
     // Perform a DELETE request and pass HTTP headers
     $client->request(
         'DELETE',
         '/post/12',
-        array(),
-        array(),
-        array('PHP_AUTH_USER' => 'username', 'PHP_AUTH_PW' => 'pa$$word')
+        [],
+        [],
+        ['PHP_AUTH_USER' => 'username', 'PHP_AUTH_PW' => 'pa$$word']
     );
 
 Last but not least, you can force each request to be executed in its own PHP
@@ -653,7 +653,7 @@ The Crawler can extract information from the nodes::
     // (_text returns the node value)
     // returns an array for each element in crawler,
     // each with the value and href
-    $info = $crawler->extract(array('_text', 'href'));
+    $info = $crawler->extract(['_text', 'href']);
 
     // executes a lambda for each node and return an array of results
     $data = $crawler->each(function ($node, $i) {
@@ -710,15 +710,15 @@ to get a ``Form`` instance for the form wrapping the button node::
 When calling the ``form()`` method, you can also pass an array of field values
 that overrides the default ones::
 
-    $form = $buttonCrawlerNode->form(array(
+    $form = $buttonCrawlerNode->form([
         'my_form[name]'    => 'Fabien',
         'my_form[subject]' => 'Symfony rocks!',
-    ));
+    ]);
 
 And if you want to simulate a specific HTTP method for the form, pass it as a
 second argument::
 
-    $form = $buttonCrawlerNode->form(array(), 'DELETE');
+    $form = $buttonCrawlerNode->form([], 'DELETE');
 
 The Client can submit ``Form`` instances::
 
@@ -727,10 +727,10 @@ The Client can submit ``Form`` instances::
 The field values can also be passed as a second argument of the ``submit()``
 method::
 
-    $client->submit($form, array(
+    $client->submit($form, [
         'my_form[name]'    => 'Fabien',
         'my_form[subject]' => 'Symfony rocks!',
-    ));
+    ]);
 
 For more complex situations, use the ``Form`` instance as an array to set the
 value of each field individually::
@@ -860,33 +860,33 @@ configuration option:
         // app/config/config_test.php
 
         // ...
-        $container->loadFromExtension('swiftmailer', array(
+        $container->loadFromExtension('swiftmailer', [
             'disable_delivery' => true,
-        ));
+        ]);
 
 You can also use a different environment entirely, or override the default
 debug mode (``true``) by passing each as options to the ``createClient()``
 method::
 
-    $client = static::createClient(array(
+    $client = static::createClient([
         'environment' => 'my_test_env',
         'debug'       => false,
-    ));
+    ]);
 
 If your application behaves according to some HTTP headers, pass them as the
 second argument of ``createClient()``::
 
-    $client = static::createClient(array(), array(
+    $client = static::createClient([], [
         'HTTP_HOST'       => 'en.example.com',
         'HTTP_USER_AGENT' => 'MySuperBrowser/1.0',
-    ));
+    ]);
 
 You can also override HTTP headers on a per request basis::
 
-    $client->request('GET', '/', array(), array(), array(
+    $client->request('GET', '/', [], [], [
         'HTTP_HOST'       => 'en.example.com',
         'HTTP_USER_AGENT' => 'MySuperBrowser/1.0',
-    ));
+    ]);
 
 .. tip::
 
diff --git a/testing/database.rst b/testing/database.rst
index cf7dd32c435..4425ad4c3d7 100644
--- a/testing/database.rst
+++ b/testing/database.rst
@@ -151,14 +151,14 @@ configuration:
     .. code-block:: php
 
         // app/config/config_test.php
-        $container->loadFromExtension('doctrine', array(
-            'dbal' => array(
+        $container->loadFromExtension('doctrine', [
+            'dbal' => [
                 'host'     => 'localhost',
                 'dbname'   => 'testdb',
                 'user'     => 'testdb',
                 'password' => 'testdb',
-            ),
-        ));
+            ],
+        ]);
 
 Make sure that your database runs on localhost and has the defined database and
 user credentials set up.
diff --git a/testing/http_authentication.rst b/testing/http_authentication.rst
index 151b00ef212..8a932153ac8 100644
--- a/testing/http_authentication.rst
+++ b/testing/http_authentication.rst
@@ -47,29 +47,29 @@ firewall, but only in the configuration file used by tests:
     .. code-block:: php
 
         // app/config/config_test.php
-        $container->loadFromExtension('security', array(
-            'firewalls' => array(
+        $container->loadFromExtension('security', [
+            'firewalls' => [
                 // replace 'main' by the name of your own firewall
-                'main' => array(
-                    'http_basic' => array(),
-                ),
-            ),
-        ));
+                'main' => [
+                    'http_basic' => [],
+                ],
+            ],
+        ]);
 
 Tests can now authenticate via HTTP passing the username and password as server
 variables using the second argument of ``createClient()``::
 
-    $client = static::createClient(array(), array(
+    $client = static::createClient([], [
         'PHP_AUTH_USER' => 'username',
         'PHP_AUTH_PW'   => 'pa$$word',
-    ));
+    ]);
 
 The username and password can also be passed on a per request basis::
 
-    $client->request('DELETE', '/post/12', array(), array(), array(
+    $client->request('DELETE', '/post/12', [], [], [
         'PHP_AUTH_USER' => 'username',
         'PHP_AUTH_PW'   => 'pa$$word',
-    ));
+    ]);
 
 Creating the Authentication Token
 ---------------------------------
@@ -120,7 +120,7 @@ needs::
 
             // you may need to use a different token class depending on your application.
             // for example, when using Guard authentication you must instantiate PostAuthenticationGuardToken
-            $token = new UsernamePasswordToken('admin', null, $firewallName, array('ROLE_ADMIN'));
+            $token = new UsernamePasswordToken('admin', null, $firewallName, ['ROLE_ADMIN']);
             $session->set('_security_'.$firewallContext, serialize($token));
             $session->save();
 
diff --git a/testing/profiling.rst b/testing/profiling.rst
index 77e90e8939e..7f2b815af97 100644
--- a/testing/profiling.rst
+++ b/testing/profiling.rst
@@ -112,11 +112,11 @@ to false:
         // app/config/config.php
 
         // ...
-        $container->loadFromExtension('framework', array(
-            'profiler' => array(
+        $container->loadFromExtension('framework', [
+            'profiler' => [
                 'enabled' => true,
                 'collect' => false,
-            ),
-        ));
+            ],
+        ]);
 
 In this way only tests that call ``$client->enableProfiler()`` will collect data.
diff --git a/translation.rst b/translation.rst
index 8dc6a41edf1..f47572faa1d 100644
--- a/translation.rst
+++ b/translation.rst
@@ -85,9 +85,9 @@ locale to lookup and return translated messages. Before using it, enable the
     .. code-block:: php
 
         // app/config/config.php
-        $container->loadFromExtension('framework', array(
-            'translator' => array('fallbacks' => array('en')),
-        ));
+        $container->loadFromExtension('framework', [
+            'translator' => ['fallbacks' => ['en']],
+        ]);
 
 See :ref:`translation-fallback` for details on the ``fallbacks`` key
 and what Symfony does when it doesn't find a translation.
@@ -149,9 +149,9 @@ different formats, XLIFF being the recommended format:
     .. code-block:: php
 
         // messages.fr.php
-        return array(
+        return [
             'Symfony is great' => 'J\'aime Symfony',
-        );
+        ];
 
 For information on where these files should be located, see
 :ref:`translation-resource-locations`.
@@ -323,7 +323,7 @@ The translator service is accessible in PHP templates through the
     <?= $view['translator']->transChoice(
         '{0} There are no apples|{1} There is one apple|]1,Inf[ There are %count% apples',
         10,
-        array('%count%' => 10)
+        ['%count%' => 10]
     ) ?>
 
 Extracting Translation Contents and Updating Catalogs Automatically
@@ -436,13 +436,13 @@ For more options, see :ref:`component-translator-message-catalogs`.
         .. code-block:: php
 
             // app/config/config.php
-            $container->loadFromExtension('framework', array(
-                'translator' => array(
-                    'paths' => array(
+            $container->loadFromExtension('framework', [
+                'translator' => [
+                    'paths' => [
                         '%kernel.project_dir%/translations',
-                    ),
-                ),
-            ));
+                    ],
+                ],
+            ]);
 
 .. note::
 
diff --git a/translation/debug.rst b/translation/debug.rst
index 1f1d040197f..b11b81559b3 100644
--- a/translation/debug.rst
+++ b/translation/debug.rst
@@ -72,9 +72,9 @@ you've already setup some translations for the ``fr`` locale inside an AcmeDemoB
     .. code-block:: php
 
         // src/Acme/AcmeDemoBundle/Resources/translations/messages.fr.php
-        return array(
+        return [
             'Symfony is great' => 'J\'aime Symfony',
-        );
+        ];
 
 and for the ``en`` locale:
 
@@ -103,9 +103,9 @@ and for the ``en`` locale:
     .. code-block:: php
 
         // src/Acme/AcmeDemoBundle/Resources/translations/messages.en.php
-        return array(
+        return [
             'Symfony is great' => 'Symfony is great',
-        );
+        ];
 
 To inspect all messages in the ``fr`` locale for the AcmeDemoBundle, run:
 
diff --git a/translation/locale.rst b/translation/locale.rst
index 0ad08b8fd4a..ffc790d6f51 100644
--- a/translation/locale.rst
+++ b/translation/locale.rst
@@ -97,12 +97,12 @@ by the routing system using the special ``_locale`` parameter:
         $routes = new RouteCollection();
         $routes->add('contact', new Route(
             '/{_locale}/contact',
-            array(
+            [
                 '_controller' => 'AppBundle:Contact:index',
-            ),
-            array(
+            ],
+            [
                 '_locale' => 'en|fr|de',
-            )
+            ]
         ));
 
         return $routes;
@@ -159,6 +159,6 @@ the framework:
     .. code-block:: php
 
         // app/config/config.php
-        $container->loadFromExtension('framework', array(
+        $container->loadFromExtension('framework', [
             'default_locale' => 'en',
-        ));
+        ]);
diff --git a/validation.rst b/validation.rst
index a59d3693a7a..d9c479b19aa 100644
--- a/validation.rst
+++ b/validation.rst
@@ -167,9 +167,9 @@ will appear.
 You could also pass the collection of errors into a template::
 
     if (count($errors) > 0) {
-        return $this->render('author/validation.html.twig', array(
+        return $this->render('author/validation.html.twig', [
             'errors' => $errors,
-        ));
+        ]);
     }
 
 Inside the template, you can output the list of errors exactly as needed:
@@ -225,11 +225,11 @@ file:
     .. code-block:: php
 
         // app/config/config.php
-        $container->loadFromExtension('framework', array(
-            'validation' => array(
+        $container->loadFromExtension('framework', [
+            'validation' => [
                 'enabled' => true,
-            ),
-        ));
+            ],
+        ]);
 
 Besides, if you plan to use annotations to configure validation, replace the
 previous configuration by the following:
@@ -261,11 +261,11 @@ previous configuration by the following:
     .. code-block:: php
 
         // app/config/config.php
-        $container->loadFromExtension('framework', array(
-            'validation' => array(
+        $container->loadFromExtension('framework', [
+            'validation' => [
                 'enable_annotations' => true,
-            ),
-        ));
+            ],
+        ]);
 
 .. index::
    single: Validation; Constraints
@@ -383,10 +383,10 @@ literature genre mostly associated with the author, which can be set to either
             {
                 // ...
 
-                $metadata->addPropertyConstraint('genre', new Assert\Choice(array(
-                    'choices' => array('fiction', 'non-fiction'),
+                $metadata->addPropertyConstraint('genre', new Assert\Choice([
+                    'choices' => ['fiction', 'non-fiction'],
                     'message' => 'Choose a valid genre.',
-                )));
+                ]));
             }
         }
 
@@ -464,7 +464,7 @@ options can be specified in this way.
 
                 $metadata->addPropertyConstraint(
                     'genre',
-                    new Assert\Choice(array('fiction', 'non-fiction'))
+                    new Assert\Choice(['fiction', 'non-fiction'])
                 );
             }
         }
@@ -485,9 +485,9 @@ of the form fields::
     public function buildForm(FormBuilderInterface $builder, array $options)
     {
         $builder
-            ->add('myField', TextType::class, array(
+            ->add('myField', TextType::class, [
                 'required' => true,
-                'constraints' => array(new Length(array('min' => 3)))
+                'constraints' => [new Length(['min' => 3])]
             ))
         ;
     }
@@ -583,7 +583,7 @@ class to have at least 3 characters.
                 $metadata->addPropertyConstraint('firstName', new Assert\NotBlank());
                 $metadata->addPropertyConstraint(
                     'firstName',
-                    new Assert\Length(array("min" => 3))
+                    new Assert\Length(["min" => 3])
                 );
             }
         }
@@ -663,9 +663,9 @@ this method must return ``true``:
         {
             public static function loadValidatorMetadata(ClassMetadata $metadata)
             {
-                $metadata->addGetterConstraint('passwordSafe', new Assert\IsTrue(array(
+                $metadata->addGetterConstraint('passwordSafe', new Assert\IsTrue([
                     'message' => 'The password cannot match your first name',
-                )));
+                ]));
             }
         }
 
diff --git a/validation/groups.rst b/validation/groups.rst
index 4424b072e67..4cee68956cc 100644
--- a/validation/groups.rst
+++ b/validation/groups.rst
@@ -110,21 +110,21 @@ user registers and when a user updates their contact information later:
         {
             public static function loadValidatorMetadata(ClassMetadata $metadata)
             {
-                $metadata->addPropertyConstraint('email', new Assert\Email(array(
-                    'groups' => array('registration'),
-                )));
-
-                $metadata->addPropertyConstraint('password', new Assert\NotBlank(array(
-                    'groups' => array('registration'),
-                )));
-                $metadata->addPropertyConstraint('password', new Assert\Length(array(
+                $metadata->addPropertyConstraint('email', new Assert\Email([
+                    'groups' => ['registration'],
+                ]));
+
+                $metadata->addPropertyConstraint('password', new Assert\NotBlank([
+                    'groups' => ['registration'],
+                ]));
+                $metadata->addPropertyConstraint('password', new Assert\Length([
                     'min'    => 7,
-                    'groups' => array('registration'),
-                )));
+                    'groups' => ['registration'],
+                ]));
 
-                $metadata->addPropertyConstraint('city', new Assert\Length(array(
+                $metadata->addPropertyConstraint('city', new Assert\Length([
                     "min" => 3,
-                )));
+                ]));
             }
         }
 
@@ -174,7 +174,7 @@ the class name or the string ``Default``.
 To tell the validator to use a specific group, pass one or more group names
 as the third argument to the ``validate()`` method::
 
-    $errors = $validator->validate($author, null, array('registration'));
+    $errors = $validator->validate($author, null, ['registration']);
 
 If no groups are specified, all constraints that belong to the group ``Default``
 will be applied.
diff --git a/validation/raw_values.rst b/validation/raw_values.rst
index eafa71e7929..330cc302327 100644
--- a/validation/raw_values.rst
+++ b/validation/raw_values.rst
@@ -51,54 +51,54 @@ Validation of arrays is possible using the ``Collection`` constraint::
 
     $validator = Validation::createValidator();
 
-    $input = array(
-        'name' => array(
-          'first_name' => 'Fabien',
-          'last_name' => 'Potencier',
-        ),
+    $input = [
+        'name' => [
+            'first_name' => 'Fabien',
+            'last_name' => 'Potencier',
+        ],
         'email' => 'test@email.tld',
         'simple' => 'hello',
         'gender' => 3,
         'file' => null,
         'password' => 'test',
-        'tags' => array(
-            array(
+        'tags' => [
+            [
                 'slug' => 'symfony_doc',
                 'label' => 'symfony doc',
-            ),
-        ),
-    );
+            ],
+        ],
+    ];
 
-    $groups = new Assert\GroupSequence(array('Default', 'custom'));
+    $groups = new Assert\GroupSequence(['Default', 'custom']);
 
-    $constraint = new Assert\Collection(array(
+    $constraint = new Assert\Collection([
         // the keys correspond to the keys in the input array
-        'name' => new Assert\Collection(array(
-          'first_name' => new Assert\Length(array('min' => 101)),
-          'last_name' => new Assert\Length(array('min' => 1)),
-        )),
+        'name' => new Assert\Collection([
+            'first_name' => new Assert\Length(['min' => 101]),
+            'last_name' => new Assert\Length(['min' => 1]),
+        ]),
         'email' => new Assert\Email(),
-        'simple' => new Assert\Length(array('min' => 102)),
-        'gender' => new Assert\Choice(array(3, 4)),
+        'simple' => new Assert\Length(['min' => 102]),
+        'gender' => new Assert\Choice([3, 4]),
         'file' => new Assert\File(),
-        'password' => new Assert\Length(array('min' => 60)),
-        'tags' => new Assert\Optional(array(
+        'password' => new Assert\Length(['min' => 60]),
+        'tags' => new Assert\Optional([
             new Assert\Type('array'),
-            new Assert\Count(array('min' => 1)),
-            new Assert\All(array(
-                new Assert\Collection(array(
-                    'slug' => array(
+            new Assert\Count(['min' => 1]),
+            new Assert\All([
+                new Assert\Collection([
+                    'slug' => [
                         new Assert\NotBlank(),
-                        new Assert\Type(array('type' => 'string'))
-                    ),
-                    'label' => array(
+                        new Assert\Type(['type' => 'string'])
+                    ],
+                    'label' => [
                         new Assert\NotBlank(),
-                    ),
-                )),
-                new CustomUniqueTagValidator(array('groups' => 'custom')),
-            )),
-        )),
-    ));
+                    ],
+                ]),
+                new CustomUniqueTagValidator(['groups' => 'custom']),
+            ]),
+        ]),
+    ]);
 
     $violations = $validator->validate($input, $constraint, $groups);
 
diff --git a/validation/sequence_provider.rst b/validation/sequence_provider.rst
index 56ddd811a3b..8648259c03d 100644
--- a/validation/sequence_provider.rst
+++ b/validation/sequence_provider.rst
@@ -113,12 +113,12 @@ username and the password are different only if all other validation passes
                 $metadata->addPropertyConstraint('username', new Assert\NotBlank());
                 $metadata->addPropertyConstraint('password', new Assert\NotBlank());
 
-                $metadata->addGetterConstraint('passwordSafe', new Assert\IsTrue(array(
+                $metadata->addGetterConstraint('passwordSafe', new Assert\IsTrue([
                     'message' => 'The password cannot match your first name',
-                    'groups'  => array('Strict'),
-                )));
+                    'groups'  => ['Strict'],
+                ]));
 
-                $metadata->setGroupSequence(array('User', 'Strict'));
+                $metadata->setGroupSequence(['User', 'Strict']);
             }
         }
 
@@ -252,10 +252,10 @@ entity and a new constraint group called ``Premium``:
             public static function loadValidatorMetadata(ClassMetadata $metadata)
             {
                 $metadata->addPropertyConstraint('name', new Assert\NotBlank());
-                $metadata->addPropertyConstraint('creditCard', new Assert\CardScheme(array(
-                    'schemes' => array('VISA'),
-                    'groups'  => array('Premium'),
-                )));
+                $metadata->addPropertyConstraint('creditCard', new Assert\CardScheme([
+                    'schemes' => ['VISA'],
+                    'groups'  => ['Premium'],
+                ]));
             }
         }
 
@@ -280,12 +280,12 @@ method, which should return an array of groups to use::
             // when returning a simple array, if there's a violation in any group
             // the rest of groups are not validated. E.g. if 'User' fails,
             // 'Premium' and 'Api' are not validated:
-            return array('User', 'Premium', 'Api');
+            return ['User', 'Premium', 'Api'];
 
             // when returning a nested array, all the groups included in each array
             // are validated. E.g. if 'User' fails, 'Premium' is also validated
             // (and you'll get its violations too) but 'Api' won't be validated:
-            return array(array('User', 'Premium'), 'Api');
+            return [['User', 'Premium'], 'Api'];
         }
     }
 
diff --git a/validation/severity.rst b/validation/severity.rst
index 17dbb4eb69c..773f60df02e 100644
--- a/validation/severity.rst
+++ b/validation/severity.rst
@@ -113,15 +113,15 @@ Use the ``payload`` option to configure the error level for each constraint:
         {
             public static function loadValidatorMetadata(ClassMetadata $metadata)
             {
-                $metadata->addPropertyConstraint('username', new Assert\NotBlank(array(
-                    'payload' => array('severity' => 'error'),
-                )));
-                $metadata->addPropertyConstraint('password', new Assert\NotBlank(array(
-                    'payload' => array('severity' => 'error'),
-                )));
-                $metadata->addPropertyConstraint('bankAccountNumber', new Assert\Iban(array(
-                    'payload' => array('severity' => 'warning'),
-                )));
+                $metadata->addPropertyConstraint('username', new Assert\NotBlank([
+                    'payload' => ['severity' => 'error'],
+                ]));
+                $metadata->addPropertyConstraint('password', new Assert\NotBlank([
+                    'payload' => ['severity' => 'error'],
+                ]));
+                $metadata->addPropertyConstraint('bankAccountNumber', new Assert\Iban([
+                    'payload' => ['severity' => 'warning'],
+                ]));
             }
         }
 
diff --git a/validation/translations.rst b/validation/translations.rst
index c720945ef37..c3fa2aee3b6 100644
--- a/validation/translations.rst
+++ b/validation/translations.rst
@@ -78,9 +78,9 @@ property is not empty, add the following:
 
             public static function loadValidatorMetadata(ClassMetadata $metadata)
             {
-                $metadata->addPropertyConstraint('name', new NotBlank(array(
+                $metadata->addPropertyConstraint('name', new NotBlank([
                     'message' => 'author.name.not_blank',
-                )));
+                ]));
             }
         }
 
@@ -111,9 +111,9 @@ Now, create a ``validators`` catalog file in the ``app/Resources/translations``
     .. code-block:: php
 
         // app/Resources/translations/validators.en.php
-        return array(
+        return [
             'author.name.not_blank' => 'Please enter an author name.',
-        );
+        ];
 
 You may need to clear your cache (even in the dev environment) after creating this
 file for the first time.
diff --git a/workflow/state-machines.rst b/workflow/state-machines.rst
index 0cbcba302c3..c60d4304973 100644
--- a/workflow/state-machines.rst
+++ b/workflow/state-machines.rst
@@ -143,53 +143,53 @@ Below is the configuration for the pull request state machine.
 
         // app/config/config.php
 
-        $container->loadFromExtension('framework', array(
+        $container->loadFromExtension('framework', [
             // ...
-            'workflows' => array(
-                'pull_request' => array(
-                  'type' => 'state_machine',
-                  'supports' => array('AppBundle\Entity\PullRequest'),
-                  'places' => array(
-                    'start',
-                    'coding',
-                    'travis',
-                    'review',
-                    'merged',
-                    'closed',
-                  ),
-                  'transitions' => array(
-                    'submit'=> array(
-                      'from' => 'start',
-                      'to' => 'travis',
-                    ),
-                    'update'=> array(
-                      'from' => array('coding','travis','review'),
-                      'to' => 'travis',
-                    ),
-                    'wait_for_review'=> array(
-                      'from' => 'travis',
-                      'to' => 'review',
-                    ),
-                    'request_change'=> array(
-                      'from' => 'review',
-                      'to' => 'coding',
-                    ),
-                    'accept'=> array(
-                      'from' => 'review',
-                      'to' => 'merged',
-                    ),
-                    'reject'=> array(
-                      'from' => 'review',
-                      'to' => 'closed',
-                    ),
-                    'reopen'=> array(
-                      'from' => 'start',
-                      'to' => 'review',
-                    ),
-                  ),
-                ),
-            ),
-        ));
+            'workflows' => [
+                'pull_request' => [
+                    'type' => 'state_machine',
+                    'supports' => ['AppBundle\Entity\PullRequest'],
+                    'places' => [
+                        'start',
+                        'coding',
+                        'travis',
+                        'review',
+                        'merged',
+                        'closed',
+                    ],
+                    'transitions' => [
+                        'submit'=> [
+                            'from' => 'start',
+                            'to' => 'travis',
+                        ],
+                        'update'=> [
+                            'from' => ['coding','travis','review'],
+                            'to' => 'travis',
+                        ],
+                        'wait_for_review'=> [
+                            'from' => 'travis',
+                            'to' => 'review',
+                        ],
+                        'request_change'=> [
+                            'from' => 'review',
+                            'to' => 'coding',
+                        ],
+                        'accept'=> [
+                            'from' => 'review',
+                            'to' => 'merged',
+                        ],
+                        'reject'=> [
+                            'from' => 'review',
+                            'to' => 'closed',
+                        ],
+                        'reopen'=> [
+                            'from' => 'start',
+                            'to' => 'review',
+                        ],
+                    ],
+                ],
+            ],
+        ]);
 
 You can now use this state machine by getting the ``state_machine.pull_request`` service::
 
diff --git a/workflow/usage.rst b/workflow/usage.rst
index ea3b3169173..4f640dcd7c1 100644
--- a/workflow/usage.rst
+++ b/workflow/usage.rst
@@ -105,42 +105,42 @@ like this:
 
         // app/config/config.php
 
-        $container->loadFromExtension('framework', array(
+        $container->loadFromExtension('framework', [
             // ...
-            'workflows' => array(
-                'blog_publishing' => array(
+            'workflows' => [
+                'blog_publishing' => [
                     'type' => 'workflow', // or 'state_machine'
-                    'audit_trail' => array(
+                    'audit_trail' => [
                         'enabled' => true
-                    ),
-                    'marking_store' => array(
+                    ],
+                    'marking_store' => [
                         'type' => 'multiple_state', // or 'single_state'
-                        'arguments' => array('currentPlace')
-                    ),
-                    'supports' => array('AppBundle\Entity\BlogPost'),
-                    'places' => array(
+                        'arguments' => ['currentPlace']
+                    ],
+                    'supports' => ['AppBundle\Entity\BlogPost'],
+                    'places' => [
                         'draft',
                         'review',
                         'rejected',
                         'published',
-                    ),
-                    'transitions' => array(
-                        'to_review' => array(
+                    ],
+                    'transitions' => [
+                        'to_review' => [
                             'from' => 'draft',
                             'to' => 'review',
-                         ),
-                         'publish' => array(
-                             'from' => 'review',
-                             'to' => 'published',
-                         ),
-                         'reject' => array(
-                             'from' => 'review',
-                             'to' => 'rejected',
-                         ),
-                     ),
-                 ),
-             ),
-         ));
+                        ],
+                        'publish' => [
+                            'from' => 'review',
+                            'to' => 'published',
+                        ],
+                        'reject' => [
+                            'from' => 'review',
+                            'to' => 'rejected',
+                        ],
+                    ],
+                ],
+            ],
+        ]);
 
 .. code-block:: php
 
@@ -309,9 +309,9 @@ workflow leaves a place::
 
         public static function getSubscribedEvents()
         {
-            return array(
+            return [
                 'workflow.blog_publishing.leave' => 'onLeave',
-            );
+            ];
         }
     }
 
@@ -351,9 +351,9 @@ See example to make sure no blog post without title is moved to "review"::
 
         public static function getSubscribedEvents()
         {
-            return array(
-                'workflow.blogpost.guard.to_review' => array('guardReview'),
-            );
+            return [
+                'workflow.blogpost.guard.to_review' => ['guardReview'],
+            ];
         }
     }