3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $obj = null; echo $obj->prop ?? 'Hello World';
Output for 7.0.0 - 7.2.0
Hello World
Output for 5.3.19 - 5.6.28
Parse error: syntax error, unexpected '?' in /in/ALnk2 on line 5
Process exited with code 255.