Get user IP Address

getIP.php

<?php

function getIP()
{
    if ($_SERVER['HTTP_CLIENT_IP'])
        $visitorIP[] = $_SERVER['HTTP_CLIENT_IP'];
    if ($_SERVER['HTTP_X_FORWARDED'])
        $visitorIP[] = $_SERVER['HTTP_X_FORWARDED'];
    if ($_SERVER['HTTP_X_FORWARDED_FOR'])
        $visitorIP[] = $_SERVER['HTTP_X_FORWARDED_FOR'];
        $visitorIP[] = $_SERVER['REMOTE_ADDR'];
    if (strpos($visitorIP, ',') !== false) {
        $ips = explode(',', $visitorIP);
        $visitorIP = trim($ips[0]);
    }
    if (ip2long($visitorIP) != -1 && ip2long($visitorIP) != false) {
        $ip = ip2long($visitorIP);
    }
    return $ip;
}