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[&#39;HTTP_USER_AGENT&#39;])){
    $br = $_SERVER[&#39;HTTP_USER_AGENT&#39;];
    if (preg_match(&#39;/MSIE/i&#39;,$br)) {    
               $br = &#39;MSIE&#39;;
             }elseif (preg_match(&#39;/Firefox/i&#39;,$br)) {
     $br = &#39;Firefox&#39;;
    }elseif (preg_match(&#39;/Chrome/i&#39;,$br)) {
     $br = &#39;Chrome&#39;;
       }elseif (preg_match(&#39;/Safari/i&#39;,$br)) {
     $br = &#39;Safari&#39;;
    }elseif (preg_match(&#39;/Opera/i&#39;,$br)) {
        $br = &#39;Opera&#39;;
    }else {
        $br = &#39;Other&#39;;
    }
    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[&#39;HTTP_ACCEPT_LANGUAGE&#39;])){
    $lang = $_SERVER[&#39;HTTP_ACCEPT_LANGUAGE&#39;];
    $lang = substr($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[&#39;HTTP_USER_AGENT&#39;])){
    $OS = $_SERVER[&#39;HTTP_USER_AGENT&#39;];
      if (preg_match(&#39;/win/i&#39;,$OS)) {
     $OS = &#39;Windows&#39;;
    }elseif (preg_match(&#39;/mac/i&#39;,$OS)) {
     $OS = &#39;MAC&#39;;
    }elseif (preg_match(&#39;/linux/i&#39;,$OS)) {
     $OS = &#39;Linux&#39;;
    }elseif (preg_match(&#39;/unix/i&#39;,$OS)) {
     $OS = &#39;Unix&#39;;
    }elseif (preg_match(&#39;/bsd/i&#39;,$OS)) {
     $OS = &#39;BSD&#39;;
    }else {
     $OS = &#39;Other&#39;;
    }
          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[&#39;HTTP_X_FORWARDED_FOR&#39;])){ //获取代理ip
    $ips = explode(&#39;,&#39;,$_SERVER[&#39;HTTP_X_FORWARDED_FOR&#39;]);
   }
   if($ip){
      $ips = array_unshift($ips,$ip); 
   }
   
   $count = count($ips);
   for($i=0;$i