- function GetIP(){
- if (getenv("HTTP_CLIENT_IP") && strcasecmp(getenv("HTTP_CLIENT_IP"), "unknown"))
- $ip = getenv("HTTP_CLIENT_IP");
- else if (getenv("HTTP_X_FORWARDED_FOR") && strcasecmp(getenv("HTTP_X_FORWARDED_FOR"), "unknown"))
- $ip = getenv("HTTP_X_FORWARDED_FOR");
- else if (getenv("REMOTE_ADDR") && strcasecmp(getenv("REMOTE_ADDR"), "unknown"))
- $ip = getenv("REMOTE_ADDR");
- else if (isset($_SERVER['REMOTE_ADDR']) && $_SERVER['REMOTE_ADDR'] && strcasecmp($_SERVER['REMOTE_ADDR'], "unknown"))
- $ip = $_SERVER['REMOTE_ADDR'];
- else
- $ip = "unknown";
- return($ip);
- }
-
-
- $ip = GetIP();
-
- echo "你的真实IP地址:".$ip;
PHP参考方法
- /**
- * 获得用户的真实IP地址
- *
- * @access public
- * @return string
- */
- function real_ip()
- {
- // 初始化一个变量$realip
- static $realip = NULL;
-
- // 如果$realip不真等于NULL,返回之
- if ($realip !== NULL)
- {
- return $realip;
- }
- // 如果$_SERVER有值
- if (isset($_SERVER))
- {
- // 如果$_SERVER['HTTP_X_FORWARDED_FOR']有值
- // 表明客户端通过代理上网
- if (isset($_SERVER['HTTP_X_FORWARDED_FOR']))
- {
- // 使用explode()函数将其用','分割成数组
- $arr = explode(',', $_SERVER['HTTP_X_FORWARDED_FOR']);
-
- /* 取X-Forwarded-For中第一个非unknown的有效IP字符串 */
- // 开始遍历数组
- foreach ($arr AS $ip)
- {
- // 去掉首尾的空白
- $ip = trim($ip);
- // 不是unknown就是真实上网地址,存值并退出循环
- if ($ip != 'unknown')
- {
- $realip = $ip;
- break;
- }
- }
- }
- // $_SERVER['HTTP_X_FORWARDED_FOR']无值 且
- // $_SERVER['HTTP_CLIENT_IP']有值,取其值作为真实IP
- elseif (isset($_SERVER['HTTP_CLIENT_IP']))
- {
- $realip = $_SERVER['HTTP_CLIENT_IP'];
- }
- // $_SERVER['HTTP_X_FORWARDED_FOR']无值(不是用过代理上网)并且
- // $_SERVER['HTTP_CLIENT_IP']也没有值
- else
- {
- // 如果$_SERVER['REMOTE_ADDR']有值,取其值作为真实IP
- if (isset($_SERVER['REMOTE_ADDR']))
- {
- $realip = $_SERVER['REMOTE_ADDR'];
- }
- else // 都没有值返回'0.0.0.0'
- {
- $realip = '0.0.0.0';
- }
- }
- }
- // $_SERVER没有值
- else
- {
- // 如果getenv('HTTP_X_FORWARDED_FOR')非空取其值作为真实IP
- if (getenv('HTTP_X_FORWARDED_FOR'))
- {
- $realip = getenv('HTTP_X_FORWARDED_FOR');
- }
- // 如果getenv('HTTP_CLIENT_IP')非空取其值作为真实IP
- elseif (getenv('HTTP_CLIENT_IP'))
- {
- $realip = getenv('HTTP_CLIENT_IP');
- }
- // 否则取getenv('REMOTE_ADDR')的值作为真实IP
- else
- {
- $realip = getenv('REMOTE_ADDR');
- }
- }
-
- preg_match("/[\d\.]{7,15}/", $realip, $onlineip);
- $realip = !emptyempty($onlineip[0]) ? $onlineip[0] : '0.0.0.0';
-
- return $realip;
- }
-
-
- $ip = real_ip();
-
- echo "你的IP地址:".$ip;