3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php if (!preg_match("/^[a-zA-Z0-9.-_]+\@[a-zA-Z0-9.-_]\+.[a-zA-Z0-9.-_]+$/",$email)); die ("Not a valid email format!");
Output for 5.0.4 - 7.1.7
Notice: Undefined variable: email in /in/6i9Il on line 3 Not a valid email format!
Output for 4.3.0 - 5.0.3
Notice: Undefined variable: email in /in/6i9Il on line 3 Not a valid email format!