3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $exists = 'Muppet'; echo $exists ?? 'nope';
based on 42eFH
Output for 7.0.0 - 7.3.1
Muppet
Output for 5.3.20 - 5.6.28
Parse error: syntax error, unexpected '?' in /in/4P0en on line 3
Process exited with code 255.