3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $a = 1; $b = 2; $c = 3; $d = 4; $a ?? $b ?? $c ?? $d;
based on Fa9eK
Output for 7.0.0 - 7.3.1
Output for 5.3.20 - 5.6.28
Parse error: syntax error, unexpected '?' in /in/QS17d on line 8
Process exited with code 255.