3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php preg_match("/^[a-zA-Z0-9.-_]+\@[a-zA-Z0-9.-_]\+.[a-zA-Z0-9.-_]+$/",$email); ?>
Output for 5.0.4 - 7.2.0
Notice: Undefined variable: email in /in/vgNh1 on line 2
Output for 4.3.0 - 5.0.3
Notice: Undefined variable: email in /in/vgNh1 on line 2