3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $value = 5; $false = false; $empty = ''; $null = null; echo $null ?? $value; echo $notSet ?? null ?? $value; echo $null ?? 0 ?? $value; var_dump($false ?? $value); var_dump($empty ?? $value);
based on vCi9L
Output for 7.0.0 - 7.2.0
550bool(false) string(0) ""
Output for 5.3.20 - 5.6.28
Parse error: syntax error, unexpected '?' in /in/pMIdu on line 8
Process exited with code 255.