php 根据ip地址 跳转到不同的页面

具体看代码 不多说

先建立一个php文件 命名为 ip.php

写入以下代码

<?
/*
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
*/

$xp_UserIp = ($_SERVER[“HTTP_VIA”]) ? $_SERVER[“HTTP_X_FORWARDED_FOR”] : $_SERVER[“REMOTE_ADDR”];
$xp_UserIp = ($xp_UserIp) ? $xp_UserIp : $_SERVER[“REMOTE_ADDR”];

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;
}

?>

var city='<?echo ipCity($xp_UserIp);?>’;

if(city.indexOf(“广州”)>=0)
{
window.location.href=”http://www.baidu.com/”;
}
else if(city.indexOf(“北京”)>=0) {
window.location.href=”http://www.163.com”;
}
else {
window.location.href=”http://www.saoyu.com/”;
}

如果要添加更多地址 请修改最后几行代码

第二步 下载 纯真ip数据库文件

第三步 在需要跳转的页面 写入 js文件

<script src=”ip.php” type=”text/javascript” language=”javascript”></script>

目录自己改了