3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $a = NULL; var_dump($a == NULL,is_null($a)); var_dump($a != NULL, isset($a)); var_dump(isset($somevar));
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
bool(true) bool(true) bool(false) bool(false) bool(false)