3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $prom = []; if($prom == null) { echo "TRUE"; }
based on k11Is
Output for 5.6.0 - 5.6.30, hhvm-3.18.4 - 3.21.0, 7.0.0 - 7.2.6
TRUE