3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $a = NULL; $b = FALSE; $d = 1; $e = $a ?? $b ?? $c ?? $d; var_dump($d);
based on qhAfs
Output for 7.0.0 - 7.2.0
int(1)
Output for 5.3.21 - 5.6.28
Parse error: syntax error, unexpected '?' in /in/TiDkL on line 5
Process exited with code 255.