Get Real IP address of Client

<?php
    function getRealIpAddr()
    {
        if (!emptyempty($_SERVER['HTTP_CLIENT_IP']))
        {
            $ip=$_SERVER['HTTP_CLIENT_IP'];
        }
        elseif (!emptyempty($_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;
    }
?>