获取客户端真实ip

 1 // 获取客户端真实ip()
 2     protected function getIP()
 3     {
 4     global $ip;
 5     if (getenv("HTTP_CLIENT_IP"))
 6     $ip = getenv("HTTP_CLIENT_IP");
 7     else if(getenv("HTTP_X_FORWARDED_FOR"))
 8     $ip = getenv("HTTP_X_FORWARDED_FOR");
 9     else if(getenv("REMOTE_ADDR"))
10     $ip = getenv("REMOTE_ADDR");
11     else $ip = "Unknow";
12     return $ip;
13     }