3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $value = 5; $zero = 0; $null = null; echo $null ?? $value; echo null ?? $value ?? $null; echo null ?? $zero ?? $value;
based on 47gXM
Output for 7.0.0 - 7.2.0
550
Output for 5.3.20 - 5.6.28
Parse error: syntax error, unexpected '?' in /in/8J7AD on line 7
Process exited with code 255.