3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php print_r(ksort(array(1=>1, 4=>4, 2=>2, 3=>3)));
Output for hhvm-3.10.0

Process exited with code 153.
Output for 5.3.0 - 5.4.5
Fatal error: Only variables can be passed by reference in /in/CXSrV on line 2
Process exited with code 255.