Get ip address in php

get_ip_address.php

 <?php
function get_ip_address()
    {
        if (isset($_SERVER)) {
            if (isset($_SERVER["HTTP_X_FORWARDED_FOR"]) && ip2long($_SERVER["HTTP_X_FORWARDED_FOR"]) !== false) {
                $ipadres = $_SERVER["HTTP_X_FORWARDED_FOR"];
            } elseif (isset($_SERVER["HTTP_CLIENT_IP"])  && ip2long($_SERVER["HTTP_CLIENT_IP"]) !== false) {
                $ipadres = $_SERVER["HTTP_CLIENT_IP"];
            } else {
                $ipadres = $_SERVER["REMOTE_ADDR"];
            }
        } else {
            if (getenv('HTTP_X_FORWARDED_FOR') && ip2long(getenv('HTTP_X_FORWARDED_FOR')) !== false) {
                $ipadres = getenv('HTTP_X_FORWARDED_FOR');
            } elseif (getenv('HTTP_CLIENT_IP') && ip2long(getenv('HTTP_CLIENT_IP')) !== false) {
                $ipadres = getenv('HTTP_CLIENT_IP');
            } else {
                $ipadres = getenv('REMOTE_ADDR');
            }
        }
        return $ipadres;
    }
?>