3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $a = "Jackie"; echo $a ?? 'empty';
based on REcO3
Output for 7.0.0 - 7.2.0
Jackie
Output for 5.3.20 - 5.6.28
Parse error: syntax error, unexpected '?' in /in/o90dW on line 4
Process exited with code 255.