3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $a = []; var_dump((bool) $a['t'] ?? null);
based on C35Aa
Output for hhvm-3.15.4, 7.0.0 - 7.2.6
Notice: Undefined index: t in /in/IVJ8C on line 5 bool(false)
Output for 5.6.0 - 5.6.30
Parse error: syntax error, unexpected '?' in /in/IVJ8C on line 5
Process exited with code 255.