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[DependencyInjection] Add defined prefix for env var processor #18464

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Jun 29, 2023
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[DependencyInjection] Add defined prefix for env var processor #18464

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37 changes: 37 additions & 0 deletions configuration/env_var_processors.rst
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Expand Up @@ -786,6 +786,43 @@ Symfony provides the following env var processors:

The ``env(enum:...)`` env var processor was introduced in Symfony 6.2.

``env(defined:NO_FOO)``
Evaluates to ``true`` if the env var is defined (ie: different from ``''`` or ``null``), ``false`` otherwise.

.. configuration-block::

.. code-block:: yaml

# config/services.yaml
parameters:
typed_env: '%env(defined:NO_FOO)%'

.. 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
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="typed_env"'%env(defined:NO_FOO)%</parameter>
</parameters>
</container>

.. code-block:: php

// config/services.php
$container->setParameter('typed_env', '%env(defined:NO_FOO)%');

.. versionadded:: 6.4

The ``env(defined:...)`` env var processor was introduced in Symfony 6.4.

It is also possible to combine any number of processors:

.. configuration-block::
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