3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $arr = array(1,1,2,2,3,3,4,4,5,5,6,6,7,7,8); for ($c = count($arr), $i = 1; $i < $c; $i++) { $arr[0] ^= $arr[$i]; } echo $arr[0];
Output for 4.3.0 - 7.1.0
8