3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php if (is_null($d) === ($d === null)) { echo "It works"; }
Output for 5.0.4 - 7.2.0
Notice: Undefined variable: d in /in/alONG on line 2 Notice: Undefined variable: d in /in/alONG on line 2 It works
Output for 4.3.0 - 5.0.3
Notice: Undefined variable: d in /in/alONG on line 2 Notice: Undefined variable: d in /in/alONG on line 2 It works