minor #14777 Add missing configurations in XML and PHP formats (sebpacz)

This PR was merged into the 4.4 branch.

Discussion
----------

Add missing configurations in XML and PHP formats

<!--

If your pull request fixes a BUG, use the oldest maintained branch that contains
the bug (see https://symfony.com/releases for the list of maintained branches).

If your pull request documents a NEW FEATURE, use the same Symfony branch where
the feature was introduced (and `5.x` for features of unreleased versions).

-->

Commits
-------

9eec4af Add missing configurations in XML and PHP formats

Author: OskarStark

configuration/env_var_processors.rst

@@ -279,12 +279,42 @@ Symfony provides the following env var processors:
 ``env(csv:FOO)``
     Decodes the content of ``FOO``, which is a CSV-encoded string:
 
-    .. code-block:: yaml
+    .. configuration-block::
 
-        parameters:
-            env(TRUSTED_HOSTS): "10.0.0.1, 10.0.0.2"
-        framework:
-           trusted_hosts: '%env(csv:TRUSTED_HOSTS)%'
+        .. code-block:: yaml
+
+            # config/packages/framework.yaml
+            parameters:
+                env(TRUSTED_HOSTS): "10.0.0.1, 10.0.0.2"
+            framework:
+               trusted_hosts: '%env(csv:TRUSTED_HOSTS)%'
+
+        .. code-block:: xml
+
+            <!-- config/packages/framework.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
+                    https://symfony.com/schema/dic/services/services-1.0.xsd
+                    http://symfony.com/schema/dic/symfony
+                    https://symfony.com/schema/dic/symfony/symfony-1.0.xsd">
+
+                <parameters>
+                    <parameter key="env(TRUSTED_HOSTS)">["10.0.0.1", "10.0.0.2"]</parameter>
+                </parameters>
+
+                <framework:config trusted-hosts="%env(csv:TRUSTED_HOSTS)%"/>
+            </container>
+
+        .. code-block:: php
+
+            // config/packages/framework.php
+            $container->setParameter('env(TRUSTED_HOSTS)', '["10.0.0.1", "10.0.0.2"]');
+            $container->loadFromExtension('framework', [
+                'trusted_hosts' => '%env(csv:TRUSTED_HOSTS)%',
+            ]);
 
 ``env(file:FOO)``
     Returns the contents of a file whose path is the value of the ``FOO`` env var:
@@ -627,16 +657,54 @@ Symfony provides the following env var processors:
 
 It is also possible to combine any number of processors:
 
-.. code-block:: yaml
+.. configuration-block::
+
+    .. code-block:: yaml
 
-    parameters:
-        env(AUTH_FILE): "%kernel.project_dir%/config/auth.json"
-    google:
-        # 1. gets the value of the AUTH_FILE env var
-        # 2. replaces the values of any config param to get the config path
-        # 3. gets the content of the file stored in that path
-        # 4. JSON-decodes the content of the file and returns it
-        auth: '%env(json:file:resolve:AUTH_FILE)%'
+        # config/packages/framework.yaml
+        parameters:
+            env(AUTH_FILE): "%kernel.project_dir%/config/auth.json"
+        google:
+            # 1. gets the value of the AUTH_FILE env var
+            # 2. replaces the values of any config param to get the config path
+            # 3. gets the content of the file stored in that path
+            # 4. JSON-decodes the content of the file and returns it
+            auth: '%env(json:file:resolve:AUTH_FILE)%'
+
+    .. code-block:: xml
+
+        <!-- config/packages/framework.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
+                https://symfony.com/schema/dic/services/services-1.0.xsd
+                http://symfony.com/schema/dic/symfony
+                https://symfony.com/schema/dic/symfony/symfony-1.0.xsd">
+
+            <parameters>
+                <parameter key="env(AUTH_FILE)">%kernel.project_dir%/config/auth.json</parameter>
+            </parameters>
+
+            <!-- 1. gets the value of the AUTH_FILE env var -->
+            <!-- 2. replaces the values of any config param to get the config path -->
+            <!-- 3. gets the content of the file stored in that path -->
+            <!-- 4. JSON-decodes the content of the file and returns it -->
+            <google auth="%env(json:file:resolve:AUTH_FILE)%"/>
+        </container>
+
+    .. code-block:: php
+
+        // config/packages/framework.php
+        $container->setParameter('env(AUTH_FILE)', '%kernel.project_dir%/config/auth.json');
+        // 1. gets the value of the AUTH_FILE env var
+        // 2. replaces the values of any config param to get the config path
+        // 3. gets the content of the file stored in that path
+        // 4. JSON-decodes the content of the file and returns it
+        $container->loadFromExtension('google', [
+            'auth' => '%env(json:file:resolve:AUTH_FILE)%',
+        ]);
 
 Custom Environment Variable Processors
 --------------------------------------