获取用户正在的ip
1 function GetIP(){
2 if (getenv("HTTP_CLIENT_IP") && strcasecmp(getenv("HTTP_CLIENT_IP"), "unknown"))
3 $ip = getenv("HTTP_CLIENT_IP");
4 else if (getenv("HTTP_X_FORWARDED_FOR") && strcasecmp(getenv("HTTP_X_FORWARDED_FOR"), "unknown"))
5 $ip = getenv("HTTP_X_FORWARDED_FOR");
6 else if (getenv("REMOTE_ADDR") && strcasecmp(getenv("REMOTE_ADDR"), "unknown"))
7 $ip = getenv("REMOTE_ADDR");
8 else if (isset($_SERVER['REMOTE_ADDR']) && $_SERVER['REMOTE_ADDR'] && strcasecmp($_SERVER['REMOTE_ADDR'], "unknown"))
9 $ip = $_SERVER['REMOTE_ADDR'];
10 else
11 $ip = "unknown";
12 return($ip);
13 }
14
15
16 $ip = GetIP();
17
18 echo "你的真实IP地址：".$ip;
PHP参考方法
1 /**
2 * 获得用户的真实IP地址
3 *
4 * @access public
5 * @return string
6 */
7 function real_ip()
8 {
9 // 初始化一个变量$realip
10 static $realip = NULL;
11
12 // 如果$realip不真等于NULL,返回之
13 if ($realip !== NULL)
14 {
15 return $realip;
16 }
17 // 如果$_SERVER有值
18 if (isset($_SERVER))
19 {
20 // 如果$_SERVER['HTTP_X_FORWARDED_FOR']有值
21 // 表明客户端通过代理上网
22 if (isset($_SERVER['HTTP_X_FORWARDED_FOR']))
23 {
24 // 使用explode()函数将其用','分割成数组
25 $arr = explode(',', $_SERVER['HTTP_X_FORWARDED_FOR']);
26
27 /* 取X-Forwarded-For中第一个非unknown的有效IP字符串 */
28 // 开始遍历数组
29 foreach ($arr AS $ip)
30 {
31 // 去掉首尾的空白
32 $ip = trim($ip);
33 // 不是unknown就是真实上网地址,存值并退出循环
34 if ($ip != 'unknown')
35 {
36 $realip = $ip;
37 break;
38 }
39 }
40 }
41 // $_SERVER['HTTP_X_FORWARDED_FOR']无值 且
42 // $_SERVER['HTTP_CLIENT_IP']有值，取其值作为真实IP
43 elseif (isset($_SERVER['HTTP_CLIENT_IP']))
44 {
45 $realip = $_SERVER['HTTP_CLIENT_IP'];
46 }
47 // $_SERVER['HTTP_X_FORWARDED_FOR']无值(不是用过代理上网)并且
48 // $_SERVER['HTTP_CLIENT_IP']也没有值
49 else
50 {
51 // 如果$_SERVER['REMOTE_ADDR']有值，取其值作为真实IP
52 if (isset($_SERVER['REMOTE_ADDR']))
53 {
54 $realip = $_SERVER['REMOTE_ADDR'];
55 }
56 else // 都没有值返回'0.0.0.0'
57 {
58 $realip = '0.0.0.0';
59 }
60 }
61 }
62 // $_SERVER没有值
63 else
64 {
65 // 如果getenv('HTTP_X_FORWARDED_FOR')非空取其值作为真实IP
66 if (getenv('HTTP_X_FORWARDED_FOR'))
67 {
68 $realip = getenv('HTTP_X_FORWARDED_FOR');
69 }
70 // 如果getenv('HTTP_CLIENT_IP')非空取其值作为真实IP
71 elseif (getenv('HTTP_CLIENT_IP'))
72 {
73 $realip = getenv('HTTP_CLIENT_IP');
74 }
75 // 否则取getenv('REMOTE_ADDR')的值作为真实IP
76 else
77 {
78 $realip = getenv('REMOTE_ADDR');
79 }
80 }
81
82 preg_match("/[\d\.]{7,15}/", $realip, $onlineip);
83 $realip = !empty($onlineip[0]) ? $onlineip[0] : '0.0.0.0';
84
85 return $realip;
86 }
87
88
89 $ip = real_ip();
90
91 echo "你的IP地址：".$ip;
92
