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php如何实现多城市切换效果?

2015-09-01 20:44:03 来源:www.45fan.com 【

php如何实现多城市切换效果?

我们先来看下个人常用的代码
PHP
<?php



include_once('./qqwry.php');
$QQWry=new QQWry; 
 
function get_real_ip(){
$ip=false;
if(!empty($_SERVER["HTTP_CLIENT_IP"])){
$ip = $_SERVER["HTTP_CLIENT_IP"];
}
if (!empty($_SERVER['HTTP_X_FORWARDED_FOR'])) {
$ips = explode (", ", $_SERVER['HTTP_X_FORWARDED_FOR']);
if ($ip) { array_unshift($ips, $ip); $ip = FALSE; }
for ($i = 0; $i < count($ips); $i++) {
if (!eregi ("^(10|172\.16|192\.168)\.", $ips[$i])) {
$ip = $ips[$i];
break;
}
}
}
return $ip;
}
 
function is_ip($str) {
 $ip = explode(".", $str);
 if (count($ip)<4 || count($ip)>4) return 0;
 foreach($ip as $ip_addr) {
  if ( !is_numeric($ip_addr) ) return 0;
  if ( $ip_addr<0 || $ip_addr>255 ) return 0;
 }
 return 1;
}
 
 
$ip=$_SERVER['REMOTE_ADDR']; 
$ifErr=$QQWry->QQWry($ip); 
$city = $QQWry->Country.$QQWry->Local;
 
//echo $city;*/
 
 
if (strpos($city,'玄武区')!==false){
 $city = "玄武区";
}
else if(strpos($city,'仙林')!==false){
 $city = "仙林";
}
else if(strpos($city,'秦淮区')!==false){
 $city = "秦淮区";
}
else if(strpos($city,'江宁')!==false){
 $city = "江宁";
}
else if(strpos($city,'鼓楼')!==false){
 $city = "鼓楼";
}
else{
 $city = "栖霞";
}



if (isset($_GET['chengshi'])) { //Ê×Ïȼì²âÊÇ·ñ»ñµÃÁË GET ´«µÝµÄÊý¾Ý 
setcookie("cookie_city",$_GET['chengshi'],time()+3600*24);
$city = $_GET['chengshi']; 
} 
else if (isset($_COOKIE["cookie_city"])) { //¼ì²âÊÇ·ñ´æÔÚêdzÆCookie 
$city = $_COOKIE["cookie_city"]; //ÏÔʾCookie±£´æµÄÊý¾Ý 
} 
else { 
setcookie("cookie_city",$city,time()+3600*24); //´¿³õʼ»¯´Ë±äÁ¿ 
$_COOKIE["cookie_city"] = $city;
} 
?>
HTML
<!DOCTYPE html>
<html lang="zh-cn">
<head>
<meta charset="utf-8"/>
<LINK href="css/css.css" type=text/css rel=stylesheet>
<SCRIPT src="js/jquery-1.4.2.min.js" type=text/javascript></SCRIPT>
<title>城市切换</title>
</head>
<BODY>
<DIV class=selCity id=allCity style="DISPLAY: none">
<DIV class=area>
<TABLE>
 <TBODY>
 <TR>
 <TD><A class=cur href="show.html">玄武区</A></TD>
 <TD><A href="show1.html">仙林</A></TD>
 <TD><A href="show2.html">秦淮区</A></TD>
 <TD><A href="show3.html">鼓楼</A></TD>
 <TD><A href="show4.html">江宁</A></TD>
 <TD><A href="show5.html">栖霞区</A></TD>
 </TR>
 </TBODY></TABLE>
<DIV class=none><A id=foldin href="javascript:;">全部</A></DIV></DIV></DIV>
<DIV class=header>
 <DIV class=area>
  <DIV class=r>
   <DIV class="topCtiy clear">
    <UL>
     
    <LI class=i1><A href="index.php">全部小区</A></LI>
     
     <LI class=i1>
     <?php 
     echo $city; 
     ?>
     </LI>
     <LI class=i2 id=changeCity>切换城市</LI>
    </UL>
   </DIV>
  </DIV>
 </DIV>
</DIV>
<SCRIPT type=text/javascript>
jQuery(function(){
 $("#changeCity").click(function(a){
  $("#allCity").slideDown(300);
  a.stopPropagation();
  $(this).blur();
 });
 $("#allCity").click(function(a){
  a.stopPropagation()
 });
 $(document).click(function(a){
  a.button!=2 && $("#allCity").slideUp(300)
 });
 $("#foldin").click(function(){
  $("#allCity").slideUp(300)
 });
});
</SCRIPT>
</body>
</html>
另外附上网友的实现方法:
使用方法:解压后QQWry.Dat就是我们想要IP地址数据库,我们新建一个ipcity文件夹,将数据库放在下面。QQ IP数据库使用非常方便,数据也很齐全,你可以及时关注官方更新以保持数据最新,强力推荐一下:)
接下来,我们在上面的ipcity目录下新建一个ipaddress.php文件,直接复制以下代码进去即可,重要的地方也作了相应注释。B段:
<?
/*
函数名称:ipCity
参数说明:$userip——用户IP地址
函数功能:PHP通过IP地址判断用户所在城市
author:lee
contact:xpsem2010@gmail.com
*/
function ipCity($userip) {
 //IP数据库路径,这里用的是QQ IP数据库 20110405 纯真版
 $dat_path = 'QQWry.dat';



 //判断IP地址是否有效
 if(!ereg("^([0-9]{1,3}.){3}[0-9]{1,3}$", $userip)){
  return 'IP Address Invalid';
 }



 //打开IP数据库
 if(!$fd = @fopen($dat_path, 'rb')){
  return 'IP data file not exists or access denied';
 }



 //explode函数分解IP地址,运算得出整数形结果
 $userip = explode('.', $userip);
 $useripNum = $userip[0] * 16777216 + $userip[1] * 65536 + $userip[2] * 256 + $userip[3];



 //获取IP地址索引开始和结束位置
 $DataBegin = fread($fd, 4);
 $DataEnd = fread($fd, 4);
 $useripbegin = implode('', unpack('L', $DataBegin));
 if($useripbegin < 0) $useripbegin += pow(2, 32);
 $useripend = implode('', unpack('L', $DataEnd));
 if($useripend < 0) $useripend += pow(2, 32);
 $useripAllNum = ($useripend - $useripbegin) / 7 + 1;



 $BeginNum = 0;
 $EndNum = $useripAllNum;



 //使用二分查找法从索引记录中搜索匹配的IP地址记录
 while($userip1num>$useripNum || $userip2num<$useripNum) {
  $Middle= intval(($EndNum + $BeginNum) / 2);



  //偏移指针到索引位置读取4个字节
  fseek($fd, $useripbegin + 7 * $Middle);
  $useripData1 = fread($fd, 4);
  if(strlen($useripData1) < 4) {
   fclose($fd);
   return 'File Error';
  }
  //提取出来的数据转换成长整形,如果数据是负数则加上2的32次幂
  $userip1num = implode('', unpack('L', $useripData1));
  if($userip1num < 0) $userip1num += pow(2, 32);



  //提取的长整型数大于我们IP地址则修改结束位置进行下一次循环
  if($userip1num > $useripNum) {
   $EndNum = $Middle;
   continue;
  }



  //取完上一个索引后取下一个索引
  $DataSeek = fread($fd, 3);
  if(strlen($DataSeek) < 3) {
   fclose($fd);
   return 'File Error';
  }
  $DataSeek = implode('', unpack('L', $DataSeek.chr(0)));
  fseek($fd, $DataSeek);
  $useripData2 = fread($fd, 4);
  if(strlen($useripData2) < 4) {
   fclose($fd);
   return 'File Error';
  }
  $userip2num = implode('', unpack('L', $useripData2));
  if($userip2num < 0) $userip2num += pow(2, 32);



  //找不到IP地址对应城市
  if($userip2num < $useripNum) {
   if($Middle == $BeginNum) {
    fclose($fd);
    return 'No Data';
   }
   $BeginNum = $Middle;
  }
 }



 $useripFlag = fread($fd, 1);
 if($useripFlag == chr(1)) {
  $useripSeek = fread($fd, 3);
  if(strlen($useripSeek) < 3) {
   fclose($fd);
   return 'System Error';
  }
  $useripSeek = implode('', unpack('L', $useripSeek.chr(0)));
  fseek($fd, $useripSeek);
  $useripFlag = fread($fd, 1);
 }



 if($useripFlag == chr(2)) {
  $AddrSeek = fread($fd, 3);
  if(strlen($AddrSeek) < 3) {
   fclose($fd);
   return 'System Error';
  }
  $useripFlag = fread($fd, 1);
  if($useripFlag == chr(2)) {
   $AddrSeek2 = fread($fd, 3);
   if(strlen($AddrSeek2) < 3) {
    fclose($fd);
    return 'System Error';
   }
   $AddrSeek2 = implode('', unpack('L', $AddrSeek2.chr(0)));
   fseek($fd, $AddrSeek2);
  } else {
   fseek($fd, -1, SEEK_CUR);
  }



  while(($char = fread($fd, 1)) != chr(0))
   $useripAddr2 .= $char;



  $AddrSeek = implode('', unpack('L', $AddrSeek.chr(0)));
  fseek($fd, $AddrSeek);



  while(($char = fread($fd, 1)) != chr(0))
   $useripAddr1 .= $char;
 } else {
  fseek($fd, -1, SEEK_CUR);
  while(($char = fread($fd, 1)) != chr(0))
   $useripAddr1 .= $char;



  $useripFlag = fread($fd, 1);
  if($useripFlag == chr(2)) {
   $AddrSeek2 = fread($fd, 3);
   if(strlen($AddrSeek2) < 3) {
    fclose($fd);
    return 'System Error';
   }
   $AddrSeek2 = implode('', unpack('L', $AddrSeek2.chr(0)));
   fseek($fd, $AddrSeek2);
  } else {
   fseek($fd, -1, SEEK_CUR);
  }
  while(($char = fread($fd, 1)) != chr(0)){
   $useripAddr2 .= $char;
  }
 }
 fclose($fd);



 //返回IP地址对应的城市结果
 if(preg_match('/http/i', $useripAddr2)) {
  $useripAddr2 = '';
 }
 $useripaddr = "$useripAddr1 $useripAddr2";
 $useripaddr = preg_replace('/CZ88.Net/is', '', $useripaddr);
 $useripaddr = preg_replace('/^s*/is', '', $useripaddr);
 $useripaddr = preg_replace('/s*$/is', '', $useripaddr);
 if(preg_match('/http/i', $useripaddr) || $useripaddr == '') {
  $useripaddr = 'No Data';
 }



 return $useripaddr;
}
?>
PHP根据IP地址实现城市切换或跳转
到这里,其实问题已经很简单了,用简单的js就通通搞定。C段如下:
//根据IP地址跳转指定页面js取得城市
var city='<?echo ipCity($xp_UserIp);?>';

//根据IP地址所有城市跳转到指定页面
if(city.indexOf("上海市")>=0){
  window.location.href="http://shanghai.demo.com/";
}
将开头的A段代码和上面的C段代码分别放在B段代码的头和尾,然后我们在需要跳转的页面加入以下代码:
<script src="/ipcity/ipaddress.php" type="text/javascript" language="javascript"></script>
刷新页面,是不是达到预想的效果了呢?
以上就是PHP获取IP地址、PHP根据IP地址判断城市以及PHP根据IP地址实现城市切换或跳转的详细介绍了,事实上,像PHP中通过IP地址自动切换城市就是这个方法的典型应用。举一反三,我们通过这种方法,也可以实现屏蔽指定IP地址或城市的用户访问,自己研究一下吧,也挺简单的:)

本文地址:http://www.45fan.com/bcdm/19661.html
Tags: 实现 PHP 城市
编辑:路饭网
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