3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $queue = array("Pop","Hon"); array_unshift("Bob",$queue ,"Van"); print_r($queue); ?>
based on WGFrS
Output for 4.3.2 - 5.4.32
Fatal error: Only variables can be passed by reference in /in/tqXPr on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Fatal error: Only variables can be passed by reference in /in/tqXPr on line 3