3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $a = '' ?? 'empty'; $b = null ?? 'empty'; var_dump($a, $b);
based on 1E6qu
Output for 7.0.0 - 7.2.0
string(0) "" string(5) "empty"
Output for 5.3.19 - 5.6.28
Parse error: syntax error, unexpected '?' in /in/FUmGn on line 3
Process exited with code 255.