3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $x = NULL; $y = NULL; $z = 3; var_dump($x ?? $y ?? $z);
based on 9HrQ8
Output for 7.0.0 - 7.2.0
int(3)
Output for 5.3.18 - 5.6.28
Parse error: syntax error, unexpected '?' in /in/4GEoF on line 5
Process exited with code 255.