3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $x = "0"; echo $x ?? 1;
based on 2NUUW
Output for hhvm-3.18.5 - 3.22.0, 7.0.0 - 7.3.0beta1
0
Output for 5.6.0 - 5.6.30
Parse error: syntax error, unexpected '?' in /in/g5AIu on line 5
Process exited with code 255.