3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php function num2alpha($n) { for($r = ""; $n >= 0; $n = intval($n / 26) - 1) $r = chr($n%26 + 0x41) . $r; return $r; } echo num2alpha(33);
Output for 4.3.0 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
AH
Output for hhvm-3.10.0

Process exited with code 153.