3v4l.org

run code in 500+ PHP versions simultaneously
<?php class A{}; class B{}; /* @var A $a */ $a = unserialize(serialize(new A())); assert($a instanceof A); var_dump($a);
Output for 8.1.12 - 8.1.34, 8.2.10 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
object(A)#1 (0) { }
preferences:
78.91 ms | 845 KiB | 4 Q