3v4l.org

run code in 300+ PHP versions simultaneously
<?php namespace Foo; class Foo {} class Bar extends Foo { function f(parent $x) {} } (new Bar)->f(new Foo());
Output for 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.30, 8.2.0 - 8.2.24, 8.3.0 - 8.3.12
preferences:
76.38 ms | 407 KiB | 5 Q