3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php function &test(){ echo 'hi'; } test();
Output for 4.4.0 - 4.4.9, 5.1.0 - 5.6.21, 7.0.0 - 7.1.0
hi Notice: Only variable references should be returned by reference in /in/u6LrX on line 4
Output for 4.3.0 - 4.3.11, hhvm-3.12.0
hi
Output for hhvm-3.10.0

Process exited with code 153.
Output for 5.0.0 - 5.0.5
hi Strict Standards: Only variable references should be returned by reference in /in/u6LrX on line 4