3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $a = 12; $b = ''; $c = $x ?? $b ?? $a; echo $c;
based on ZYdQV
Output for 7.0.0 - 7.2.0
Output for 5.3.19 - 5.6.28
Parse error: syntax error, unexpected '?' in /in/tX5sh on line 5
Process exited with code 255.