3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $red = 'apple'; echo !!$red; echo !!$blue;
Output for 5.0.4 - 7.1.0
1 Notice: Undefined variable: blue in /in/blf2Y on line 4
Output for 4.3.0 - 5.0.3
1 Notice: Undefined variable: blue in /in/blf2Y on line 4