.. _the-__sleep()-serialization-magic-method-has-been-deprecated.:

The __sleep() serialization magic method has been deprecated.
-------------------------------------------------------------
 
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Description
___________
 
Class serialization in PHP has had multiple mechanism introduced to control its behaviour by userland. Initially with the __sleep() and __wakeup() magic methods, then with the Serializable interface and finally with __serialize() and __unserialize(). 

In the end, the ``__serialize`` and ``__unserialize`` methods must be used, instead of ``__sleep`` and ``__wakeup``.

Example
_______

.. code-block:: php

   <?php
   
   class X {
       function __sleep() {}
   }
   
   ?>

Solutions
_________

+ Rename the method to ``__serialize``.

Related Error Messages
______________________

+ :ref:`the-__wakeup()-serialization-magic-method-has-been-deprecated.`

See Also
________

+ `PHP RFC: Deprecations for PHP 8.5 <https://wiki.php.net/rfc/deprecations_php_8_5>`_

Changed Behavior
________________

This error may appear following an evolution in behavior, in previous versions. See ` <https://php-changed-behaviors.readthedocs.io/en/latest/behavior/.html>`_.