3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $_GET['user'] = null; $username = $_GET['user'] ?? 'nobody'; $username = isset($_GET['user']) ? $_GET['user'] : 'nobody'; echo $username;
based on WgvM0
Output for 7.0.0 - 7.2.6
nobody
Output for 5.3.19 - 5.6.28
Parse error: syntax error, unexpected '?' in /in/nlqWm on line 3
Process exited with code 255.