3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php function factorial_of_a_number($n) { if($n ==0) { return 1; } else { return $n * factorial_of_a_number($n-1); } } print_r(factorial_of_a_number(4)); ?>
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
24