add xml and php configuration blocks

Author: stevenmusumeche

cookbook/configuration/mongodb_session_storage.rst

@@ -46,6 +46,90 @@ need to change/add some parameters in the main configuration file:
                 class: Symfony\Component\HttpFoundation\Session\Storage\Handler\MongoDbSessionHandler
                 arguments: [@mongo_client, %mongo.session.options%]
 
+    .. 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"
+            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">
+
+            <framework:config>
+                <!-- ... -->
+
+                <!-- cookie-lifetime and gc-maxlifetime are optional and set to
+                     30 days in this example -->
+                <framework:session handler-id="session.handler.mongo"
+                    cookie-lifetime="2592000"
+                    gc-maxlifetime="2592000"
+                />
+            </framework:config>
+
+            <parameters>
+                <parameter key="mongo.session.options" type="collection">
+                    <!-- your MongoDB database name -->
+                    <parameter key="database">session_db</parameter>
+                    <!-- your MongoDB collection name -->
+                    <parameter key="collection">session</parameter>
+                </parameter>
+                <!-- your MongoDB server's IP -->
+                <parameter key="mongodb_host">1.2.3.4</parameter>
+                <parameter key="mongodb_username">my_username</parameter>
+                <parameter key="mongodb_password">my_password</parameter>
+            </parameters>
+
+            <services>
+                <service id="mongo_client" class="MongoClient">
+                    <!-- if using a username and password -->
+                    <argument>mongodb://%mongodb_username%:%mongodb_password%@%mongodb_host%:27017</argument>
+
+                    <!-- if not using a username and password -->
+                    <argument>mongodb://%mongodb_host%:27017</argument>
+                </service>
+
+                <service id="session.handler.mongo" class="Symfony\Component\HttpFoundation\Session\Storage\Handler\MongoDbSessionHandler">
+                    <argument type="service">mongo_client</argument>
+                    <argument>%mongo.session.options%</argument>
+                </service>
+        </container>
+
+    .. code-block:: php
+
+        use Symfony\Component\DependencyInjection\Reference;
+        use Symfony\Component\DependencyInjection\Definition;
+
+        $container->loadFromExtension('framework', array(
+            'session' => array(
+                // ...
+                '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->setParameter('mongo.session.options', array(
+            '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');
+
+        $container->setDefinition('mongo_client', new Definition('MongoClient', array(
+            // if using a username and password
+            array('mongodb://%mongodb_username%:%mongodb_password%@%mongodb_host%:27017'),
+            // if not using a username and password
+            array('mongodb://%mongodb_host%:27017'),
+        )));
+
+        $container->setDefinition('session.handler.mongo', new Definition(
+            'Symfony\Component\HttpFoundation\Session\Storage\Handler\MongoDbSessionHandler',
+            array(new Reference('mongo_client'), '%mongo.session.options%')
+        ));
+
 Setting Up the MongoDB Collection
 ---------------------------------
 Because MongoDB uses dynamic collection schemas, you do not need to do anything to initialize your