3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php function &bar() { return null; } var_dump(bar());
Output for 4.4.0 - 4.4.9, 5.1.0 - 7.2.0
Notice: Only variable references should be returned by reference in /in/IvRMo on line 4 NULL
Output for 5.0.0 - 5.0.5
Strict Standards: Only variable references should be returned by reference in /in/IvRMo on line 4 NULL
Output for 4.3.0 - 4.3.11
NULL