3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $a1=array(); array_push($a1, 1); array_push($a1, 1); array_unique($a1);
based on eNNpU
Output for 5.6.0 - 5.6.30, hhvm-3.15.4, 7.0.0 - 7.2.6