3v4l.org

run code in 300+ PHP versions simultaneously
<?php abstract class A{ protected abstract function x(); } abstract class B extends A{ public abstract function x(); }
Output for 7.2.29 - 7.2.33, 7.3.16 - 7.3.33, 7.4.3 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
Output for 7.0.0 - 7.0.18, 7.1.0 - 7.1.4
Fatal error: Can't inherit abstract function A::x() (previously declared abstract in B) in /in/CU0t2 on line 9
Process exited with code 255.

preferences:
97.55 ms | 1392 KiB | 4 Q