3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $foo = NULL; echo $foo ?? "baz";
based on 0I7CS
Output for 7.0.0 - 7.2.0
baz
Output for 5.3.22 - 5.6.28
Parse error: syntax error, unexpected '?' in /in/V9Kmf on line 5
Process exited with code 255.