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[ExpressionLanguage] Document ExpressionFunction::fromPhp #7517

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Feb 28, 2017
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[ExpressionLanguage] Document ExpressionFunction::fromPhp #7517

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Add fromPhp tip
maidmaid Feb 21, 2017
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Update extending.rst
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15 changes: 15 additions & 0 deletions components/expression_language/extending.rst
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Expand Up @@ -90,6 +90,21 @@ register.
}
}

.. tip::

To create an expression function from a PHP function with the
:method:`Symfony\\Component\\ExpressionLanguage\\ExpressionFunction::fromPhp` static method::

ExpressionFunction::fromPhp('strtoupper');

Namespaced functions are supported, but they require a second argument to
define the name of the expression::

ExpressionFunction::fromPhp('My\strtoupper', 'my_strtoupper');

.. versionadded:: 3.3
The ``ExpressionFunction::fromPhp()`` method was introduced in Symfony 3.3.

You can register providers using
:method:`Symfony\\Component\\ExpressionLanguage\\ExpressionLanguage::registerProvider`
or by using the second argument of the constructor::
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