`__sleep()` is deprecated in PHP 8.5

[swissspidy]

NOTE: Please file security related issues to security@mabe.berlin
to be able to coordinate releases across dependent projects privately.

Detailed description:

PHP 8.5 deprecates the __sleep() and __wakeup() magic methods, see https://wiki.php.net/rfc/deprecations_php_8_5.

The recommendation is to implement __serialize() instead (or in addition, if support for old PHP versions is necessary)

This package uses it here:

php-enum/src/Enum.php

Lines 89 to 97 in 7159809

	/**
	* @throws LogicException Serialization is not supported by default in this pseudo-enum implementation
	*
	* @psalm-return never-return
	*/
	final public function __sleep()
	{
	throw new LogicException('Serialization is not supported by default in this pseudo-enum implementation');
	}

Steps to reproduce:

1. Run on PHP 8.5

Expected behavior:

No deprecation warnings :)

Environment:

Important information of your environment.

• PHP Version: PHP 8.5.0-dev (cli) (built: Sep 10 2025 21:48:22) (NTS)
• PHP Extensions + Versions: ...
• PHP Configuration: ...
• ...

Additional context:

N/A

[marc-mabe]

Hi @swissspidy ,

Thank you for your bug report 👍

I have opened a PR #163 to fix the deprecation message for PHP 8.5.
Please have a look if everything works as expected for you.