3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $x = NULL; $y = 7; $z = 3; $x = $x ?? $y ?? $z; var_dump($x);
based on Luh4n
Output for 7.0.0 - 7.3.0alpha1
int(7)
Output for 5.3.20 - 5.6.28
Parse error: syntax error, unexpected '?' in /in/NKkeV on line 6
Process exited with code 255.