Bug #79352 [NEW]: ArrayObject::serialize and ArrayObject::unserialize are no longer overrideable

From: tarasov dot igor at gmail dot com Operating system: Linux PHP version: 7.4.3 Package: SPL related Bug Type: Bug Bug description:ArrayObject::serialize and ArrayObject::unserialize are no longer overrideable Description: ------------ If you inherit from ArrayObject and then try to override serialize and unserialize methods, you'll notice that starting with PHP 7.4 these are not executed at all. There are no mentions in the documentation describing this change. Sure, there are new __serialize and __unserialize, but this backward-incompatible change and is not described anywhere. If you create a custom class implementing Serializable interface, you can still override these methods in child classes, no problem there. Not sure if this change affects only ArrayObject, I suspect there might be other built-in classes that were changed the same way. Test script: --------------- class Foo extends \ArrayObject { public function serialize() { return 'test'; } } echo serialize(new Foo); Expected result: ---------------- C:3:"Foo":4:{test} Actual result: -------------- O:3:"Foo":3:{i:0;i:0;i:1;a:0:{}i:2;a:0:{}} So, Foo::serialize is never executed. And it's not like the results are ignored, you can even change it's body to die statement and it won't stop there. -- Edit bug report at https://bugs.php.net/bug.php?id=79352&edit=1 -- Fix committed: https://bugs.php.net/fix.php?id=79352&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=79352&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=79352&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=79352&r=needscript Try newer version: https://bugs.php.net/fix.php?id=79352&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=79352&r=support Expected behavior: https://bugs.php.net/fix.php?id=79352&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=79352&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=79352&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=79352&r=globals PHP version support discontinued: https://bugs.php.net/fix.php?id=79352&r=phptooold Daylight Savings: https://bugs.php.net/fix.php?id=79352&r=dst IIS Stability: https://bugs.php.net/fix.php?id=79352&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=79352&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=79352&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=79352&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=79352&r=mysqlcfg