3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php function foo(&$x) {} foo(new StdClass);
Output for 7.0.14 - 7.2.0
Notice: Only variables should be passed by reference in /in/cLpE9 on line 3
Output for 4.3.0 - 7.0.6