3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $purchaseSnapshot = ['ss' => 'rock']; var_dump($purchaseSnapshot['type'] ?? null);
Output for hhvm-3.15.4, 7.0.0 - 7.3.0
NULL
Output for 5.6.0 - 5.6.38
Parse error: syntax error, unexpected '?' in /in/57V4E on line 5
Process exited with code 255.