获取用户Ip地址通用方法

 1     public static function getIp()
 2     {
 3         if ($HTTP_SERVER_VARS["HTTP_X_FORWARDED_FOR"])
 4         {
 5             $ip = $HTTP_SERVER_VARS["HTTP_X_FORWARDED_FOR"];
 6         }
 7         elseif ($HTTP_SERVER_VARS["HTTP_CLIENT_IP"])
 8         {
 9             $ip = $HTTP_SERVER_VARS["HTTP_CLIENT_IP"];
10         }
11         elseif ($HTTP_SERVER_VARS["REMOTE_ADDR"])
12         {
13             $ip = $HTTP_SERVER_VARS["REMOTE_ADDR"];
14         }
15         elseif (getenv("HTTP_X_FORWARDED_FOR"))
16         {
17             $ip = getenv("HTTP_X_FORWARDED_FOR");
18         }
19         elseif (getenv("HTTP_CLIENT_IP"))
20         {
21             $ip = getenv("HTTP_CLIENT_IP");
22         }
23         elseif (getenv("REMOTE_ADDR"))
24         {
25             $ip = getenv("REMOTE_ADDR");
26         }
27         else
28         {
29             $ip = "Unknown";
30         }
31         if(strpos($ip, ',') !== false){
32             $ip = explode(',', $ip);
33             $ip = reset($ip);
34         }
35         return $ip;
36     }
37     
转载自：https://www.cnblogs.com/520blog/p/5789337.html
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