3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $ip = $_SERVER['REMOTE_ADDR']; if (!empty($_SERVER['HTTP_CLIENT_IP'])) { $ip = $_SERVER['HTTP_CLIENT_IP']; } elseif (!empty($_SERVER['HTTP_X_FORWARDED_FOR'])) { $ip = $_SERVER['HTTP_X_FORWARDED_FOR']; } echo $ip ?>
Output for 5.3.0 - 7.2.0
Notice: Undefined index: REMOTE_ADDR in /in/tjEWX on line 3
Output for 4.3.0 - 5.2.17
Notice: Undefined index: REMOTE_ADDR in /in/tjEWX on line 3