3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $a = 1; echo $a; unset($a); echo $a;
based on lcCYJ
Output for 5.6.0 - 5.6.30, hhvm-3.15.4, 7.0.0 - 7.3.0rc3
1 Notice: Undefined variable: a in /in/bRJ3d on line 9