3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $user = $_GET[‘user’] ?? "nobody"; print $user;
Output for 7.2.0
Warning: Use of undefined constant ‘user’ - assumed '‘user’' (this will throw an Error in a future version of PHP) in /in/Kn4f7 on line 3 nobody
Output for 7.0.0 - 7.1.10
Notice: Use of undefined constant ‘user’ - assumed '‘user’' in /in/Kn4f7 on line 3 nobody
Output for 5.3.18 - 5.6.28
Parse error: syntax error, unexpected '?' in /in/Kn4f7 on line 3
Process exited with code 255.