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State that env var type-processors are nullable #18283

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State that env var type-processors are nullable #18283

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14 changes: 7 additions & 7 deletions configuration/env_var_processors.rst
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Original file line number Diff line number Diff line change
Expand Up @@ -59,7 +59,7 @@ Built-In Environment Variable Processors
Symfony provides the following env var processors:

``env(string:FOO)``
Casts ``FOO`` to a string:
Casts ``FOO`` to a string or null:

.. configuration-block::

Expand Down Expand Up @@ -104,8 +104,8 @@ Symfony provides the following env var processors:
};

``env(bool:FOO)``
Casts ``FOO`` to a bool (``true`` values are ``'true'``, ``'on'``, ``'yes'``
and all numbers except ``0`` and ``0.0``; everything else is ``false``):
Casts ``FOO`` to a bool or null (``true`` values are ``'true'``, ``'on'``, ``'yes'``
and all numbers except ``0`` and ``0.0``; everything else is ``false``; except for ``null``, which stays ``null``):

.. configuration-block::

Expand Down Expand Up @@ -150,8 +150,8 @@ Symfony provides the following env var processors:
};

``env(not:FOO)``
Casts ``FOO`` to a bool (just as ``env(bool:...)`` does) except it returns the inverted value
(falsy values are returned as ``true``, truthy values are returned as ``false``):
Casts ``FOO`` to a bool or null (just as ``env(bool:...)`` does) except it returns the inverted value
(falsy values are returned as ``true``, truthy values are returned as ``false``, ``null`` stays ``null``):

.. configuration-block::

Expand Down Expand Up @@ -185,10 +185,10 @@ Symfony provides the following env var processors:
$container->setParameter('safe_for_production', '%env(not:APP_DEBUG)%');

``env(int:FOO)``
Casts ``FOO`` to an int.
Casts ``FOO`` to an int or null.

``env(float:FOO)``
Casts ``FOO`` to a float.
Casts ``FOO`` to a float or null.

``env(const:FOO)``
Finds the const value named in ``FOO``:
Expand Down