3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $a['abba'] = false; var_dump($a['abba'] ?? false);
based on rEbrY
Output for hhvm-3.18.5 - 3.22.0, 7.1.0 - 7.3.0rc3
bool(false)
Output for 5.6.0 - 5.6.30
Parse error: syntax error, unexpected '?' in /in/i4QlT on line 3
Process exited with code 255.