获取客户端IP

// 获取IP
function getIp()
{
    $ip = false;
    if(!empty($_SERVER["HTTP_CLIENT_IP"])){
        $ip = $_SERVER["HTTP_CLIENT_IP"];
    }
    if(!empty($_SERVER['HTTP_X_FORWARDED_FOR'])){
        $ips = explode (", ", $_SERVER['HTTP_X_FORWARDED_FOR']);
        if($ip){ 
            array_unshift($ips, $ip); $ip = FALSE; 
        }
        for ($i = 0; $i < count($ips); $i++) {
                if (!eregi ("^(10│172.16│192.168).", $ips[$i])) {
                $ip = $ips[$i];
                break;
            }
        }
    }
    return ($ip ? $ip : $_SERVER['REMOTE_ADDR']);
 }