3v4l.org

run code in 300+ PHP versions simultaneously
<?php function fact($n) { return $n == 0 ? 1 : ($n==1 ? 1 : $n * fact($n - 1)) ; } echo fact(5);
Output for 7.3.0 - 7.3.31, 7.4.0 - 7.4.25, 8.0.0 - 8.0.12, 8.1rc1 - rc3
120

preferences:
29.81 ms | 460 KiB | 5 Q