3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php function rev($str) { if ( ! $str ) { return; } return rev(substr($str,1)) . $str{0}; } function sum($arr) { if ( ! is_array($arr) ) { return; } return $arr[0] + sum(array_shift($arr)); } $a = array(5,4,7,8,9,3); echo sum($a); echo rev('hola mundos ninos');
Output for 5.3.7 - 7.2.0
5sonin sodnum aloh