3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $a = array('a');array_push((array)$a['a'], 'a');print_r($a);
Output for 5.3.0 - 5.4.15
Fatal error: Only variables can be passed by reference in /in/FCKmF on line 2
Process exited with code 255.