3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php var_dump($_GET); var_dump(&$_GET['undefined_index']);
Output for 5.4.0 - 5.4.31
Fatal error: Call-time pass-by-reference has been removed in /in/Suv2n on line 4
Process exited with code 255.
Output for 5.3.0 - 5.3.29
Deprecated: Call-time pass-by-reference has been deprecated in /in/Suv2n on line 4 array(0) { } &NULL