3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php array_walk(array(1,2,3), function($x){ echo $x;});
based on ul8Qm
Output for 4.3.2 - 5.4.32
Fatal error: Only variables can be passed by reference in /in/LQdkN 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/LQdkN on line 3