3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $data = null; $data_set = $data ?? "undefined"; echo $data_set;
Output for 7.0.0 - 7.2.0
undefined
Output for 5.3.19 - 5.6.21
Parse error: syntax error, unexpected '?' in /in/gWDvo on line 5
Process exited with code 255.