3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $c = 'c'; echo $a ?? 'b'."\n"; echo $a ?? $b ?? $c ?? 'd';
based on oRUQV
Output for 7.0.0 - 7.2.0
b c
Output for 5.4.0 - 5.6.28
Parse error: syntax error, unexpected '?' in /in/fv3HC on line 4
Process exited with code 255.