3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $a = 8; function foo(&$x){ $x = null; echo 'fooey'; } foo($a); var_dump($a);
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
fooeyNULL