3v4l.org

run code in 300+ PHP versions simultaneously
<?php class C implements Serializable{ public function serialize() { return serialize( [] ); } public function unserialize( $serialized ) { $data = unserialize( $serialized ); } } var_dump(serialize(new C));
Output for 8.1.0 - 8.1.26, 8.2.0 - 8.2.13, 8.3.0
Deprecated: C implements the Serializable interface, which is deprecated. Implement __serialize() and __unserialize() instead (or in addition, if support for old PHP versions is necessary) in /in/dGViF on line 3 string(18) "C:1:"C":6:{a:0:{}}"
Output for 7.4.0 - 7.4.33, 8.0.1 - 8.0.30
string(18) "C:1:"C":6:{a:0:{}}"
preferences:
79.38 ms | 402 KiB | 108 Q