3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $arr = array('root_key' => array(1,2,3); echo key($arr);
Output for 5.3.0 - 5.4.24
Parse error: syntax error, unexpected ';', expecting ')' in /in/Jcu6q on line 2
Process exited with code 255.