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[DependencyInjection] Add documentation for the env DI expression function #16518

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Mar 11, 2022
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[DependencyInjection] Add documentation for the env DI expression function #16518

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4 changes: 3 additions & 1 deletion service_container/expression_language.rst
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Expand Up @@ -73,12 +73,14 @@ to another service: ``App\Mailer``. One way to do this is with an expression:

To learn more about the expression language syntax, see :doc:`/components/expression_language/syntax`.

In this context, you have access to 2 functions:
In this context, you have access to 3 functions:

``service``
Returns a given service (see the example above).
``parameter``
Returns a specific parameter value (syntax is like ``service``).
``env``
Returns the value of an env variable.

You also have access to the :class:`Symfony\\Component\\DependencyInjection\\Container`
via a ``container`` variable. Here's another example:
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