3v4l.org

run code in 300+ PHP versions simultaneously
<?php class Foo { public function __sleep() { return "Baz"; } } class Bar implements Serializable{ public function serialize() { return "Baz"; } public function unserialize($data) { } } $foo = new Foo; $bar = new Bar; var_dump(serialize($foo)); var_dump(serialize($bar));

preferences:
42.53 ms | 402 KiB | 5 Q