3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php function test(&$var) { $var = & $GLOBALS['_SERVER']; } test($bar); var_dump($bar);
based on AdLgJ
Output for 4.3.0 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
NULL
Output for hhvm-3.10.0

Process exited with code 153.