先要获取ip地址相当简单,下面先介绍两种获取IP地址的代码,后面需要利用QQIP库来查找当前IP是属于那个IP段然后得出城市字段并返回.
获取IP地址,代码如下:
- <?php
- function GetIP() {
- if ($_SERVER["HTTP_X_FORWARDED_FOR"])
- $ip = $_SERVER["HTTP_X_FORWARDED_FOR"];
- else if ($_SERVER["HTTP_CLIENT_IP"])
- $ip = $_SERVER["HTTP_CLIENT_IP"];
- else if ($_SERVER["REMOTE_ADDR"])
- $ip = $_SERVER["REMOTE_ADDR"];
- else if (getenv("HTTP_X_FORWARDED_FOR"))
- $ip = getenv("HTTP_X_FORWARDED_FOR");
- else if (getenv("HTTP_CLIENT_IP"))
- $ip = getenv("HTTP_CLIENT_IP");
- else if (getenv("REMOTE_ADDR"))
- $ip = getenv("REMOTE_ADDR");
- else
- $ip = "Unknown";
- return $ip;
- }
- echo GetIP();
- ?>
方法二,代码如下:
- function getip ()
- {
- if (getenv('http_client_ip')) {
- $ip = getenv('http_client_ip');
- } else if (getenv('http_x_forwarded_for')) {
- $ip = getenv('http_x_forwarded_for');
- } else if (getenv('remote_addr')) {
- $ip = getenv('remote_addr');
- } else {
- $ip = $_server['remote_addr'];
- }
- return $ip;
PHP通过IP地址判断用户所在城市
上文已经获得了用户IP地址,接下来,我们就是根据这个IP地址获得用户所在城市了,开始之前,我们需要下载一个现成的数据库QQ IP数据库.
最新IP地址数据库:http://8.zjdx2.crsky.com/201209/qqwry0830.rar
使用方法:解压后QQWry.Dat就是我们想要IP地址数据库,我们新建一个ipcity文件夹,将数据库放在下面,QQ IP数据库使用非常方便,数据也很齐全,你可以及时关注官方更新以保持数据最新,强力推荐一下.
接下来,我们在上面的ipcity目录下新建一个ipaddress.php文件,直接复制以下代码进去即可,重要的地方也作了相应注释,代码如下:
- <?php
-
-
-
-
-
-
-
- function ipCity($userip) {
-
- $dat_path = 'QQWry.dat';
-
-
- if(!ereg("^([0-9]{1,3}.){3}[0-9]{1,3}$", $userip)){
- return 'IP Address Invalid';
- }
-
-
- if(!$fd = @fopen($dat_path, 'rb')){
- return 'IP data file not exists or access denied';
- }
-
-
- $userip = explode('.', $userip);
- $useripNum = $userip[0] * 16777216 + $userip[1] * 65536 + $userip[2] * 256 + $userip[3];
-
-
- $DataBegin = fread($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 = $useripAllNum;
-
-
- while($userip1num>$useripNum || $userip2num<$useripNum) {
- $Middle= intval(($EndNum + $BeginNum) / 2);
-
-
- fseek($fd, $useripbegin + 7 * $Middle);
- $useripData1 = fread($fd, 4);
- if(strlen($useripData1) < 4) {
- fclose($fd);
- return 'File Error';
- }
-
- $userip1num = implode('', unpack('L', $useripData1));
- if($userip1num < 0) $userip1num += pow(2, 32);
-
-
- if($userip1num > $useripNum) {
- $EndNum = $Middle;
- continue;
- }
-
-
- $DataSeek = fread($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) $userip2num += pow(2, 32);
-
-
- if($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);
-
-
- 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 $useripaddr;
- }
- ?>
PHP根据IP地址实现城市切换或跳转,到这里,其实问题已经很简单了,用简单的js就通通搞定,C段如下:
-
- var city='<?echo ipCity($xp_UserIp);?>';
-
- if(city.indexOf("上海市")>=0){
- window.location.href="http://shanghai.phpfensi.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?
上面的代码只是简单的判断了ip那里就跳到那,如果出现如,我想把湖南所有IP都跳到长沙去,那像衡阳,刘阳,耒阳 这些就要作多次父线处理了. |