3v4l.org

run code in 300+ PHP versions simultaneously
<?php abstract class A { abstract public function t(A $a); } final class B extends A { public function t($a){ echo $a; } } $b = new B; $b->t(5);
Output for 7.3.0 - 7.3.33, 7.4.0 - 7.4.27, 8.0.0 - 8.0.15, 8.1.0 - 8.1.2
5

preferences:
92.27 ms | 460 KiB | 5 Q