[#8003] add XML and PHP config examples

Author: xabbuh

security/csrf_in_login_form.rst

@@ -19,12 +19,38 @@ Configuring CSRF Protection
 First, make sure that the CSRF protection is enabled in the main cofiguration
 file:
 
-.. code-block:: yaml
+.. configuration-block::
+
+    .. code-block:: yaml
+
+        # app/config/config.yml
+        framework:
+            # ...
+            csrf_protection: ~
+
+    .. code-block:: xml
 
-    # app/config/config.yml
-    framework:
-        # ...
-        csrf_protection: ~
+        <!-- app/config/config.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>
+                <framework:csrf-protection enabled="true" />
+            </framework:config>
+        </container>
+
+    .. code-block:: php
+
+        // app/config/config.php
+        $container->loadFromExtension('framework', array(
+            '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: