3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $y = NULL; $x = $y ?? 1;
based on e5F7P
Output for 7.0.0 - 7.3.0alpha1
Output for 5.3.20 - 5.6.28
Parse error: syntax error, unexpected '?' in /in/hKpb0 on line 3
Process exited with code 255.