3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $value = 5; $false = false; $empty = ''; $null = null; echo $null ?? $value; echo $null ?? null ?? $value; echo $null ?? $zero ?? $value; echo $false ?? $value; echo $empty ?? $value;
based on 8J7AD
Output for 7.0.0 - 7.2.0
555
Output for 5.3.20 - 5.6.28
Parse error: syntax error, unexpected '?' in /in/3OUeI on line 8
Process exited with code 255.