php获取真实的ip信息

代码：

获取用户真实浏览器地址，都可用
    /**
     * 测试
     */
    public 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 {
            $ip = "unknown";
        }
        dump($ip);
    }



    public function getRealIP(){
        $ip = '';
        foreach (array('HTTP_CLIENT_IP', 'HTTP_X_FORWARDED_FOR', 'HTTP_FROM', 'REMOTE_ADDR') as $v) {
            if (isset($_SERVER[$v])) {
                if (!preg_match('/^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}$/',$_SERVER[$v])) {
                    continue;
                }
                $ip = $_SERVER[$v];
                break;
            }
        }
        dump($ip);
    }