3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $nonexistent= []; $value = $nonexistent ?? 'default'; var_dump($value);
based on 9pZ2L
Output for 7.0.0 - 7.2.0
array(0) { }
Output for 5.4.2 - 5.6.28
Parse error: syntax error, unexpected '?' in /in/27f7r on line 4
Process exited with code 255.
Output for 5.3.18 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/27f7r on line 2
Process exited with code 255.