Remove Symfony 4.3 features from 4.2 docs

components/console/helpers/progressbar.rst

@@ -95,33 +95,6 @@ that the progress bar display is refreshed with a 100% completion.
     :method:`Symfony\\Component\\Console\\Helper\\ProgressBar::display`
     to show the progress bar again.
 
-If the progress information is stored in an iterable variable (such as an array
-or a PHP generator) you can use the
-:method:`Symfony\\Component\\Console\\Helper\\ProgressBar::iterate` method,
-which starts, advances and finishes the progress bar automatically::
-
-    use Symfony\Component\Console\Helper\ProgressBar;
-
-    $progressBar = new ProgressBar($output);
-
-    // $iterable can be for example an array ([1, 2, 3, ...]) or a generator
-    // $iterable = function () { yield 1; yield 2; ... };
-    foreach ($progressBar->iterate($iterable) as $value) {
-        // ... do some work
-    }
-
-If ``$iterable = [1, 2]``, the previous code will output the following:
-
-.. code-block:: terminal
-
-     0/2 [>---------------------------]   0%
-     1/2 [==============>-------------]  50%
-     2/2 [============================] 100%
-
-.. versionadded:: 4.3
-
-    The ``iterate()`` method was introduced in Symfony 4.3.
-
 Customizing the Progress Bar
 ----------------------------
 

components/dom_crawler.rst

@@ -204,13 +204,6 @@ Access the value of the first node of the current selection::
     // if the node does not exist, calling to text() will result in an exception
     $message = $crawler->filterXPath('//body/p')->text();
 
-    // avoid the exception passing an argument that text() returns when node does not exist
-    $message = $crawler->filterXPath('//body/p')->text('Default text content');
-
-.. versionadded:: 4.3
-
-    The default argument of ``text()`` was introduced in Symfony 4.3.
-
 Access the attribute value of the first node of the current selection::
 
     $class = $crawler->filterXPath('//body/p')->attr('class');
@@ -219,17 +212,12 @@ Extract attribute and/or node values from the list of nodes::
 
     $attributes = $crawler
         ->filterXpath('//body/p')
-        ->extract(['_name', '_text', 'class'])
+        ->extract(['_text', 'class'])
     ;
 
 .. note::
 
-    Special attribute ``_text`` represents a node value, while ``_name``
-    represents the element name (the HTML tag name).
-
-    .. versionadded:: 4.3
-
-        The special attribute ``_name`` was introduced in Symfony 4.3.
+    Special attribute ``_text`` represents a node value.
 
 Call an anonymous function on each node of the list::
 
@@ -309,13 +297,6 @@ and :phpclass:`DOMNode` objects::
         // if the node does not exist, calling to html() will result in an exception
         $html = $crawler->html();
 
-        // avoid the exception passing an argument that html() returns when node does not exist
-        $html = $crawler->html('Default <strong>HTML</strong> content');
-
-    .. versionadded:: 4.3
-
-        The default argument of ``html()`` was introduced in Symfony 4.3.
-
 Expression Evaluation
 ~~~~~~~~~~~~~~~~~~~~~
 

configuration/external_parameters.rst

@@ -446,15 +446,6 @@ Symfony provides the following env var processors:
                 'auth' => '%env(file:AUTH_FILE)%',
             ]);
 
-``env(trim:FOO)``
-    Trims the content of ``FOO`` env var, removing whitespaces from the beginning
-    and end of the string. This is especially useful in combination with the
-    ``file`` processor, as it'll remove newlines at the end of a file.
-
-    .. versionadded:: 4.3
-
-        The ``trim`` processor was introduced in Symfony 4.3.
-
 ``env(key:FOO:BAR)``
     Retrieves the value associated with the key ``FOO`` from the array whose
     contents are stored in the ``BAR`` env var:
@@ -493,51 +484,6 @@ Symfony provides the following env var processors:
             $container->setParameter('env(SECRETS_FILE)', '/opt/application/.secrets.json');
             $container->setParameter('database_password', '%env(key:database_password:json:file:SECRETS_FILE)%');
 
-``env(default:fallback_param:BAR)``
-    Retrieves the value of the parameter ``fallback_param`` when the ``BAR`` env
-    var is not available:
-
-    .. configuration-block::
-
-        .. code-block:: yaml
-
-            # config/services.yaml
-            parameters:
-                # if PRIVATE_KEY is not a valid file path, the content of raw_key is returned
-                private_key: '%env(default:raw_key:file:PRIVATE_KEY)%'
-                raw_key: '%env(PRIVATE_KEY)%'
-
-        .. code-block:: xml
-
-            <!-- config/services.xml -->
-            <?xml version="1.0" encoding="UTF-8" ?>
-            <container xmlns="http://symfony.com/schema/dic/services"
-                xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-                xmlns:framework="http://symfony.com/schema/dic/symfony"
-                xsi:schemaLocation="http://symfony.com/schema/dic/services
-                    http://symfony.com/schema/dic/services/services-1.0.xsd
-                    http://symfony.com/schema/dic/symfony
-                    http://symfony.com/schema/dic/symfony/symfony-1.0.xsd">
-
-                <parameters>
-                    <!-- if PRIVATE_KEY is not a valid file path, the content of raw_key is returned -->
-                    <parameter key="private_key">%env(default:raw_key:file:PRIVATE_KEY)%</parameter>
-                    <parameter key="raw_key">%env(PRIVATE_KEY)%</parameter>
-                </parameters>
-            </container>
-
-        .. code-block:: php
-
-            // config/services.php
-
-            // if PRIVATE_KEY is not a valid file path, the content of raw_key is returned
-            $container->setParameter('private_key', '%env(default:raw_key:file:PRIVATE_KEY)%');
-            $container->setParameter('raw_key', '%env(PRIVATE_KEY)%');
-
-    .. versionadded:: 4.3
-
-        The ``default`` processor was introduced in Symfony 4.3.
-
 It is also possible to combine any number of processors:
 
 .. code-block:: yaml

console/coloring.rst

@@ -74,25 +74,8 @@ You can also set these colors and options directly inside the tag name::
     or use the :method:`Symfony\\Component\\Console\\Formatter\\OutputFormatter::escape`
     method to escape all the tags included in the given string.
 
-Displaying Clickable Links
-~~~~~~~~~~~~~~~~~~~~~~~~~~
-
-.. versionadded:: 4.3
-    The feature to display clickable links was introduced in Symfony 4.3.
-
-Commands can use the special ``<href>`` tag to display links similar to the
-``<a>`` elements of web pages::
-
-    $output->writeln('<href=https://symfony.com>Symfony Homepage</>');
-
-If your terminal belongs to the `list of terminal emulators that support links`_
-you can click on the *"Symfony Homepage"* text to open its URL in your default
-browser. Otherwise, you'll see *"Symfony Homepage"* as regular text and the URL
-will be lost.
-
 .. _Cmder: http://cmder.net/
 .. _ConEmu: https://conemu.github.io/
 .. _ANSICON: https://github.com/adoxa/ansicon/releases
 .. _Mintty: https://mintty.github.io/
 .. _Hyper: https://hyper.is/
-.. _`list of terminal emulators that support links`: https://gist.github.com/egmontkob/eb114294efbcd5adb1944c9f3cb5feda

form/create_custom_field_type.rst

@@ -99,12 +99,6 @@ The goal of this field was to extend the choice type to enable selection of the
 shipping type. This is achieved by fixing the ``choices`` to a list of available
 shipping options.
 
-.. tip::
-
-    If the purpose of this new form type was to customize the rendering of some
-    fields only, skip this step and use ``block_name`` or ``block_prefix`` options
-    instead to :ref:`define a custom form fragment name <form-fragment-custom-naming>`.
-
 .. tip::
 
     Run the following command to verify that the form type was successfully

form/form_themes.rst

@@ -275,32 +275,6 @@ form. You can also define this value explicitly with the ``block_name`` option::
 In this example, the fragment name will be ``_product_custom_name_widget``
 instead of the default ``_product_name_widget``.
 
-.. _form-fragment-custom-naming:
-
-Custom Fragment Naming for Individual Fields
-............................................
-
-The ``block_prefix`` option allows form fields to define their own custom
-fragment name. This is mostly useful to customize some instances of the same
-field without having to :doc:`create a custom form type </form/create_custom_field_type>`::
-
-    use Symfony\Component\Form\Extension\Core\Type\TextType;
-    use Symfony\Component\Form\FormBuilderInterface;
-
-    public function buildForm(FormBuilderInterface $builder, array $options)
-    {
-        $builder->add('name', TextType::class, array(
-            'block_prefix' => 'wrapped_text',
-        ));
-    }
-
-.. versionadded:: 4.3
-
-    The ``block_prefix`` option was introduced in Symfony 4.3.
-
-Now you can use ``wrapped_text_row``, ``wrapped_text_widget``, etc. as the block
-names.
-
 .. _form-custom-prototype:
 
 Fragment Naming for Collections

routing.rst

@@ -511,14 +511,6 @@ So how can you make ``blog_list`` once again match when the user visits
 Now, when the user visits ``/blog``, the ``blog_list`` route will match and
 ``$page`` will default to a value of ``1``.
 
-If you want to always include some default value in the generated URL (for
-example to force the generation of ``/blog/1`` instead of ``/blog`` in the
-previous example) add the ``!`` character before the placeholder name: ``/blog/{!page}``
-
-.. versionadded:: 4.3
-    The feature to force the inclusion of default values in generated URLs was
-    introduced in Symfony 4.3.
-
 As it happens with requirements, default values can also be inlined in each
 placeholder using the syntax ``{placeholder_name?default_value}``. This feature
 is compatible with inlined requirements, so you can inline both in a single

security/csrf.rst

@@ -108,15 +108,6 @@ this can be customized on a form-by-form basis::
         // ...
     }
 
-You can also customize the rendering of the CSRF form field creating a custom
-:doc:`form theme </form/form_themes>` and using ``csrf_token`` as the prefix of
-the field (e.g. define ``{% block csrf_token_widget %} ... {% endblock %}`` to
-customize the entire form field contents).
-
-.. versionadded:: 4.3
-
-    The ``csrf_token`` form field prefix was introduced in Symfony 4.3.
-
 CSRF Protection in Login Forms
 ------------------------------
 

service_container/alias_private.rst

@@ -146,69 +146,6 @@ This means that when using the container directly, you can access the
             # ...
             app.mailer: '@App\Mail\PhpMailer'
 
-Deprecating Service Aliases
-~~~~~~~~~~~~~~~~~~~~~~~~~~~
-
-If you decide to deprecate the use of a service alias (because it is outdated
-or you decided not to maintain it anymore), you can deprecate its definition:
-
-.. configuration-block::
-
-    .. code-block:: yaml
-
-        app.mailer:
-            alias: '@AppBundle\Mail\PhpMailer'
-
-            # this will display a generic deprecation message...
-            deprecated: true
-
-            # ...but you can also define a custom deprecation message
-            deprecated: 'The "%alias_id%" alias is deprecated. Don\'t use it anymore.'
-
-    .. code-block:: xml
-
-        <?xml version="1.0" encoding="UTF-8" ?>
-        <container xmlns="http://symfony.com/schema/dic/services"
-            xmlns:xsi="http://www.w3.org/2001/XMLSchema-Instance"
-            xsi:schemaLocation="http://symfony.com/schema/dic/services http://symfony.com/schema/dic/services/services-1.0.xsd">
-
-            <services>
-                <service id="app.mailer" alias="App\Mail\PhpMailer">
-                    <!-- this will display a generic deprecation message... -->
-                    <deprecated />
-
-                    <!-- ...but you can also define a custom deprecation message -->
-                    <deprecated>The "%alias_id%" service alias is deprecated. Don't use it anymore.</deprecated>
-                </service>
-            </services>
-        </container>
-
-    .. code-block:: php
-
-        $container
-            ->setAlias('app.mailer', 'App\Mail\PhpMailer')
-
-            // this will display a generic deprecation message...
-            ->setDeprecated(true)
-
-            // ...but you can also define a custom deprecation message
-            ->setDeprecated(
-                true,
-                'The "%alias_id%" service alias is deprecated. Don\'t use it anymore.'
-            )
-        ;
-
-Now, every time this service alias is used, a deprecation warning is triggered,
-advising you to stop or to change your uses of that alias.
-
-The message is actually a message template, which replaces occurrences of the
-``%alias_id%`` placeholder by the service alias id. You **must** have at least
-one occurrence of the ``%alias_id%`` placeholder in your template.
-
-.. versionadded:: 4.3
-
-    The ``deprecated`` option for service aliases was introduced in Symfony 4.3.
-
 Anonymous Services
 ------------------