3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php namespace websharks\test; $GLOBALS[__NAMESPACE__] = null; $app = $GLOBALS[__NAMESPACE__] ?? 'hello'; echo $app;
based on O7DJR
Output for 7.0.0 - 7.2.0
hello
Output for 5.4.0 - 5.6.28
Parse error: syntax error, unexpected '?' in /in/TI0UP on line 5
Process exited with code 255.