3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $md5 = array('x'); for($i=0; $i < 10000; $i++){ $md5[] = md5($md5[count($md5)-1]); }
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0