3v4l.org

run code in 300+ PHP versions simultaneously
<?php declare(strict_types=1); class Example { public function foo(?int $f) { } } $e = new Example; $e->foo(null); //$e->foo(9); //$e->foo('string');
Output for 7.1.7, 7.3.24 - 7.3.33, 7.4.12 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4

preferences:
144.22 ms | 402 KiB | 115 Q