3v4l.org

run code in 300+ PHP versions simultaneously
<?php class A extends stdClass {}; class B extends A {}; $b = new B(); $b->foo = 'bar';
Output for 8.1.23 - 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
preferences:
78 ms | 842 KiB | 4 Q