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:
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<?php
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function GetIP() {
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if ($_SERVER["HTTP_X_FORWARDED_FOR"])
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$ip = $_SERVER["HTTP_X_FORWARDED_FOR"];
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else if ($_SERVER["HTTP_CLIENT_IP"])
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$ip = $_SERVER["HTTP_CLIENT_IP"];
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else if ($_SERVER["REMOTE_ADDR"])
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$ip = $_SERVER["REMOTE_ADDR"];
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else if (getenv("HTTP_X_FORWARDED_FOR"))
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$ip = getenv("HTTP_X_FORWARDED_FOR");
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else if (getenv("HTTP_CLIENT_IP"))
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$ip = getenv("HTTP_CLIENT_IP");
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else if (getenv("REMOTE_ADDR"))
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$ip = getenv("REMOTE_ADDR");
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else
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$ip = "Unknown";
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return $ip;
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}
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echo GetIP();
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?>
方法二,代码如下:
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function getip ()
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{
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if (getenv('http_client_ip')) {
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$ip = getenv('http_client_ip');
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} else if (getenv('http_x_forwarded_for')) {
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$ip = getenv('http_x_forwarded_for');
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} else if (getenv('remote_addr')) {
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$ip = getenv('remote_addr');
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} else {
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$ip = $_server['remote_addr'];
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}
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return $ip;
PHP通过IP地址判断用户所在城市
上文已经获得了用户IP地址,接下来,我们就是根据这个IP地址获得用户所在城市了,开始之前,我们需要下载一个现成的数据库QQ IP数据库.
最新IP地址数据库:http://8.zjdx2.crsky.com/201209/qqwry0830.rar
使用方法:解压后QQWry.Dat就是我们想要IP地址数据库,我们新建一个ipcity文件夹,将数据库放在下面,QQ IP数据库使用非常方便,数据也很齐全,你可以及时关注官方更新以保持数据最新,强力推荐一下.
接下来,我们在上面的ipcity目录下新建一个ipaddress.php文件,直接复制以下代码进去即可,重要的地方也作了相应注释,代码如下:
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<?php
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function ipCity($userip) {
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$dat_path = 'QQWry.dat';
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if(!ereg("^([0-9]{1,3}.){3}[0-9]{1,3}$", $userip)){
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return 'IP Address Invalid';
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}
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if(!$fd = @fopen($dat_path, 'rb')){
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return 'IP data file not exists or access denied';
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}
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$userip = explode('.', $userip);
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$useripNum = $userip[0] * 16777216 + $userip[1] * 65536 + $userip[2] * 256 + $userip[3];
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$DataBegin = fread($fd, 4);
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$DataEnd = fread($fd, 4);
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$useripbegin = implode('', unpack('L', $DataBegin));
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if($useripbegin < 0) $useripbegin += pow(2, 32);
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$useripend = implode('', unpack('L', $DataEnd));
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if($useripend < 0) $useripend += pow(2, 32);
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$useripAllNum = ($useripend - $useripbegin) / 7 + 1;
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$BeginNum = 0;
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$EndNum = $useripAllNum;
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while($userip1num>$useripNum || $userip2num<$useripNum) {
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$Middle= intval(($EndNum + $BeginNum) / 2);
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fseek($fd, $useripbegin + 7 * $Middle);
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$useripData1 = fread($fd, 4);
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if(strlen($useripData1) < 4) {
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fclose($fd);
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return 'File Error';
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}
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$userip1num = implode('', unpack('L', $useripData1));
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if($userip1num < 0) $userip1num += pow(2, 32);
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if($userip1num > $useripNum) {
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$EndNum = $Middle;
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continue;
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}
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$DataSeek = fread($fd, 3);
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if(strlen($DataSeek) < 3) {
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fclose($fd);
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return 'File Error';
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}
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$DataSeek = implode('', unpack('L', $DataSeek.chr(0)));
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fseek($fd, $DataSeek);
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$useripData2 = fread($fd, 4);
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if(strlen($useripData2) < 4) {
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fclose($fd);
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return 'File Error';
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}
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$userip2num = implode('', unpack('L', $useripData2));
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if($userip2num < 0) $userip2num += pow(2, 32);
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if($userip2num < $useripNum) {
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if($Middle == $BeginNum) {
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fclose($fd);
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return 'No Data';
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}
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$BeginNum = $Middle;
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}
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}
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$useripFlag = fread($fd, 1);
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if($useripFlag == chr(1)) {
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$useripSeek = fread($fd, 3);
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if(strlen($useripSeek) < 3) {
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fclose($fd);
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return 'System Error';
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}
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$useripSeek = implode('', unpack('L', $useripSeek.chr(0)));
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fseek($fd, $useripSeek);
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$useripFlag = fread($fd, 1);
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}
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if($useripFlag == chr(2)) {
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$AddrSeek = fread($fd, 3);
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if(strlen($AddrSeek) < 3) {
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fclose($fd);
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return 'System Error';
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}
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$useripFlag = fread($fd, 1);
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if($useripFlag == chr(2)) {
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$AddrSeek2 = fread($fd, 3);
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if(strlen($AddrSeek2) < 3) {
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fclose($fd);
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return 'System Error';
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}
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$AddrSeek2 = implode('', unpack('L', $AddrSeek2.chr(0)));
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fseek($fd, $AddrSeek2);
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} else {
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fseek($fd, -1, SEEK_CUR);
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}
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while(($char = fread($fd, 1)) != chr(0))
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$useripAddr2 .= $char;
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$AddrSeek = implode('', unpack('L', $AddrSeek.chr(0)));
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fseek($fd, $AddrSeek);
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while(($char = fread($fd, 1)) != chr(0))
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$useripAddr1 .= $char;
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} else {
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fseek($fd, -1, SEEK_CUR);
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while(($char = fread($fd, 1)) != chr(0))
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$useripAddr1 .= $char;
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$useripFlag = fread($fd, 1);
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if($useripFlag == chr(2)) {
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$AddrSeek2 = fread($fd, 3);
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if(strlen($AddrSeek2) < 3) {
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fclose($fd);
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return 'System Error';
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}
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$AddrSeek2 = implode('', unpack('L', $AddrSeek2.chr(0)));
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fseek($fd, $AddrSeek2);
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} else {
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fseek($fd, -1, SEEK_CUR);
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}
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while(($char = fread($fd, 1)) != chr(0)){
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$useripAddr2 .= $char;
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}
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}
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fclose($fd);
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if(preg_match('/http/i', $useripAddr2)) {
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$useripAddr2 = '';
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}
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$useripaddr = "$useripAddr1 $useripAddr2";
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$useripaddr = preg_replace('/CZ88.Net/is', '', $useripaddr);
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$useripaddr = preg_replace('/^s*/is', '', $useripaddr);
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$useripaddr = preg_replace('/s*$/is', '', $useripaddr);
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if(preg_match('/http/i', $useripaddr) || $useripaddr == '') {
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$useripaddr = 'No Data';
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}
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return $useripaddr;
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}
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?>
PHP根据IP地址实现城市切换或跳转,到这里,其实问题已经很简单了,用简单的js就通通搞定,C段如下:
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var city='<?echo ipCity($xp_UserIp);?>';
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if(city.indexOf("上海市")>=0){
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window.location.href="http://shanghai.vcphp.com/";
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}
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.
(责任编辑:最模板) |