ZaiSL

function getIP(){
    if (!empty($_SERVER['HTTP_CLIENT_IP'])){
        //check ip from share internet
        $ip = $_SERVER['HTTP_CLIENT_IP'];
    }
    else if (!empty($_SERVER['HTTP_X_FORWARDED_FOR'])){
        //to check ip is pass from proxy
        $ip = $_SERVER['HTTP_X_FORWARDED_FOR'];
    }
    else {
        $ip = $_SERVER['REMOTE_ADDR'];
    }  

    return $ip;
}