php伪造IP地址与来源程序代码

$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, http://www.111cn.net/);
curl_setopt($ch, CURLOPT_HTTPHEADER, array('X-FORWARDED-FOR:8.8.8.8', 'CLIENT-IP:8.8.8.8')); //构造IP
curl_setopt($ch, CURLOPT_REFERER, "http://www.baidu.com/ "); //构造来路
curl_setopt($ch, CURLOPT_HEADER, 1);
$out = curl_exec($ch);
curl_close($ch);

function getClientIp() {
     if (!emptyempty($_SERVER["HTTP_CLIENT_IP"]))
     $ip = $_SERVER["HTTP_CLIENT_IP"];
     else if (!emptyempty($_SERVER["HTTP_X_FORWARDED_FOR"]))
     $ip = $_SERVER["HTTP_X_FORWARDED_FOR"];
     else if (!emptyempty($_SERVER["REMOTE_ADDR"]))
     $ip = $_SERVER["REMOTE_ADDR"];
     else
     $ip = "err";
     return $ip;
     }