3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $x = null; # $y is not set var_dump($x); var_dump($y); var_dump(isset($x)); var_dump(isset($y));
Output for 5.0.4 - 7.1.0
NULL Notice: Undefined variable: y in /in/oWqXr on line 7 NULL bool(false) bool(false)
Output for 4.3.0 - 5.0.3
NULL Notice: Undefined variable: y in /in/oWqXr on line 7 NULL bool(false) bool(false)