3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $foo = $_GET['bar'] ?? 'hello'; echo $foo;
based on gt3fm
Output for 7.0.0 - 7.2.0
hello
Output for 5.3.19 - 5.6.28
Parse error: syntax error, unexpected '?' in /in/OOYl1 on line 2
Process exited with code 255.