3v4l.org

run code in 300+ PHP versions simultaneously
<?php (fn(...$x) => var_dump($x))(['a' => 'b']);
Output for 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
array(1) { [0]=> array(1) { ["a"]=> string(1) "b" } }
preferences:
47.9 ms | 843 KiB | 4 Q