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run code in 200+ php & hhvm versions
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<?php //$ip_address = $_SERVER['REMOTE_ADDR'] //whether ip is from share internet if (!empty($_SERVER['HTTP_CLIENT_IP'])) { $ip_address=$_SERVER['HTTP_CLIENT_IP']; } //whether ip is from proxy elseif (!empty($_SERVER['HTTP_X_FORWARDED_FOR'])) { $ip_address=$_SERVER['HTTP_X_FORWARDED_FOR']; } //whether ip is from remote address else { $ip_address = $_SERVER['REMOTE_ADDR']; } echo $ip_address; ?>
Output for 5.3.0 - 7.2.0
Notice: Undefined index: REMOTE_ADDR in /in/6lRB4 on line 19
Output for 4.3.0 - 5.2.17
Notice: Undefined index: REMOTE_ADDR in /in/6lRB4 on line 19