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[DependencyInjection][Improve] Constant YAML with expression language #7395

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[DependencyInjection][Improve] Constant YAML with expression language #7395

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36d0902
YAML with expression language
20uf Jan 21, 2017
a4d11b9
[#7395] Improve example for 2.7 & 2.8
20uf Feb 22, 2017
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17 changes: 17 additions & 0 deletions service_container/parameters.rst
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Expand Up @@ -225,6 +225,12 @@ key and define the type as ``constant``.

.. configuration-block::

.. code-block:: yaml

parameters:
global.constant.value: "@=constant('GLOBAL_CONSTANT')"
my_class.constant.value: "@=constant('My_Class::CONSTANT_NAME')"

.. code-block:: xml

<?xml version="1.0" encoding="UTF-8" ?>
Expand All @@ -243,6 +249,12 @@ key and define the type as ``constant``.
$container->setParameter('global.constant.value', GLOBAL_CONSTANT);
$container->setParameter('my_class.constant.value', My_Class::CONSTANT_NAME);

.. caution::

It's also possible to use PHP constants in YAML files using expression language.
You must have :doc:`/components/expression_language` installed.
To learn more about the expression language syntax, see :doc:`/components/expression_language/syntax`.

.. tip::

If you're using YAML, you can :doc:`import an XML file </service_container/import>`
Expand All @@ -253,6 +265,11 @@ key and define the type as ``constant``.
imports:
- { resource: parameters.xml }

.. note::

In Symfony 3.2 YAML support PHP constants.


PHP Keywords in XML
-------------------

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