PHP获取仿客IP地址的函数

记录访客ip地址,可以查看访客的来源地址.对网站的优化及为重要.以下为获取ip的万能函数.

以下为引用的内容：
function getIP() {
        if (getenv('HTTP_CLIENT_IP')) {
                        $ip = getenv('HTTP_CLIENT_IP'); php程序员站
                }
                elseif (getenv('HTTP_X_FORWARDED_FOR')) {
                        $ip = getenv('HTTP_X_FORWARDED_FOR');
                }
                elseif (getenv('HTTP_X_FORWARDED')) {

php程序员站

                        $ip = getenv('HTTP_X_FORWARDED');
                }
                elseif (getenv('HTTP_FORWARDED_FOR')) {
                        $ip = getenv('HTTP_FORWARDED_FOR');

phperz.com

                }
                elseif (getenv('HTTP_FORWARDED')) {
                        $ip = getenv('HTTP_FORWARDED');
                }
                else {

phperz.com

                        $ip = $_SERVER['REMOTE_ADDR'];
                }
                return $ip;
}