3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php if (!empty($_SERVER['HTTP_CLIENT_IP'])) { $ip_address = $_SERVER['HTTP_CLIENT_IP']; } echo $ip_address; ?>
based on dNbuT
Output for 5.0.4 - 7.2.0
Notice: Undefined variable: ip_address in /in/sXlXT on line 6
Output for 4.3.0 - 5.0.3
Notice: Undefined variable: ip_address in /in/sXlXT on line 6