3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $string = Null; $alpha = $string ?? 'No Input'; echo $alpha;
based on l9Yk4
Output for 7.0.0 - 7.2.0
No Input
Output for 5.3.20 - 5.6.28
Parse error: syntax error, unexpected '?' in /in/0X0pm on line 3
Process exited with code 255.