3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $x = null; var_dump($x); var_dump($y); var_dump($x===$y); isset($x); ?>
Output for 5.0.4 - 7.1.0
NULL Notice: Undefined variable: y in /in/35k7r on line 4 NULL Notice: Undefined variable: y in /in/35k7r on line 5 bool(true)
Output for 4.3.0 - 5.0.3
NULL Notice: Undefined variable: y in /in/35k7r on line 4 NULL Notice: Undefined variable: y in /in/35k7r on line 5 bool(true)