3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $x=null; if(!$x) echo 1; else echo 0;
based on D8fZf
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.13.2, 7.0.0 - 7.1.0
1