php 获取客户端的ip、地理信息、浏览器信息、本地真实ip

<?php
 // 作用取得客户端的ip、地理信息、浏览器http://blog.qita.in
 class get_gust_info { 
  
  ////获得访客浏览器类型
  function GetBrowser(){
   if(!empty($_SERVER['HTTP_USER_AGENT'])){
    $br = $_SERVER['HTTP_USER_AGENT'];
    if (preg_match('/MSIE/i',$br)) {    
               $br = 'MSIE';
             }elseif (preg_match('/Firefox/i',$br)) {
     $br = 'Firefox';
    }elseif (preg_match('/Chrome/i',$br)) {
     $br = 'Chrome';
       }elseif (preg_match('/Safari/i',$br)) {
     $br = 'Safari';
    }elseif (preg_match('/Opera/i',$br)) {
        $br = 'Opera';
    }else {
        $br = 'Other';
    }
    return $br;
   }else{return "获取浏览器信息失败！";} 
  }
  
  ////获得访客浏览器语言
  function GetLang(){
   if(!empty($_SERVER['HTTP_ACCEPT_LANGUAGE'])){
    $lang = $_SERVER['HTTP_ACCEPT_LANGUAGE'];
    $lang = substr($lang,0,5);
    if(preg_match("/zh-cn/i",$lang)){
     $lang = "简体中文";
    }elseif(preg_match("/zh/i",$lang)){
     $lang = "繁体中文";
    }else{
        $lang = "English";
    }
    return $lang;
    
   }else{return "获取浏览器语言失败！";}
  }
  
   ////获取访客操作系统
  function GetOs(){
   if(!empty($_SERVER['HTTP_USER_AGENT'])){
    $OS = $_SERVER['HTTP_USER_AGENT'];
      if (preg_match('/win/i',$OS)) {
     $OS = 'Windows';
    }elseif (preg_match('/mac/i',$OS)) {
     $OS = 'MAC';
    }elseif (preg_match('/linux/i',$OS)) {
     $OS = 'Linux';
    }elseif (preg_match('/unix/i',$OS)) {
     $OS = 'Unix';
    }elseif (preg_match('/bsd/i',$OS)) {
     $OS = 'BSD';
    }else {
     $OS = 'Other';
    }
          return $OS;  
   }else{return "获取访客操作系统信息失败！";}   
  }
  
  ////获得访客真实ip
  function Getip(){
   if(!empty($_SERVER["HTTP_CLIENT_IP"])){   
      $ip = $_SERVER["HTTP_CLIENT_IP"];
   }
   if(!empty($_SERVER['HTTP_X_FORWARDED_FOR'])){ //获取代理ip
    $ips = explode(',',$_SERVER['HTTP_X_FORWARDED_FOR']);
   }
   if($ip){
      $ips = array_unshift($ips,$ip); 
   }
   
   $count = count($ips);
   for($i=0;$i