.. _\__function__-in-closure-changed:

__FUNCTION__ In Closure Changed
===============================
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		__FUNCTION__ In Closure Changed: When using the magic constant ``__FUNCTION__`` inside a closure, the content used to be the ``{closure}`` string only.
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	:og:description: When using the magic constant ``__FUNCTION__`` inside a closure, the content used to be the ``{closure}`` string only
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When using the magic constant ``__FUNCTION__`` inside a closure, the content used to be the ``{closure}`` string only. Since PHP 8.4, it also includes the name of the original file, and the line number, so as to identify the origin source code.

PHP code
________
.. code-block:: php

   <?php
   
   $foo = fn() => __FUNCTION__;
   
   $closure = function() { return __FUNCTION__;};
   
   echo $foo();
   
   echo $closure();
   
   
   ?>

Before
______
.. code-block:: output

   {closure}{closure}

After
______
.. code-block:: output

   {closure:/codes/magicConstantInClosure.php:3}{closure:/codes/magicConstantInClosure.php:5}


PHP version change
__________________
This behavior changed in 8.4