3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php function f1($x) { $sum=1; for ($i=$x;$i>0;$i--){ $sum=$sum*$i; } return $sum; } $a=f1(5); echo $a; ?>
Output for 4.3.0 - 7.1.0
120