網(wǎng)上很多都轉(zhuǎn)載的,存在代碼的不完整,有的還很繁瑣,下面的是修正無錯(cuò)版本
- <?
- //php獲取ip的算法
- $user_IP = ($_SERVER["HTTP_VIA"]) ? $_SERVER["HTTP_X_FORWARDED_FOR"] : $_SERVER["REMOTE_ADDR"];
- $user_IP = ($user_IP) ? $user_IP : $_SERVER["REMOTE_ADDR"];
- //echo $user_IP;
- ?>
- <?
- function convertip($ip) {
- //IP數(shù)據(jù)文件路徑
- $dat_path = 'qqwry.dat';
- //檢查IP地址
- if(!ereg("^([0-9]{1,3}.){3}[0-9]{1,3}$", $ip)){
- return 'IP Address Error';
- }
- //打開IP數(shù)據(jù)文件
- if(!$fd = @fopen($dat_path, 'rb')){
- return 'IP date file not exists or access denied';
- }
- //分解IP進(jìn)行運(yùn)算,得出整形數(shù)
- $ip = explode('.', $ip);
- $ipNum = $ip[0] * 16777216 + $ip[1] * 65536 + $ip[2] * 256 + $ip[3];
- //獲取IP數(shù)據(jù)索引開始和結(jié)束位置
- $DataBegin = fread($fd, 4);
- $DataEnd = fread($fd, 4);
- $ipbegin = implode('', unpack('L', $DataBegin));
- if($ipbegin < 0) $ipbegin += pow(2, 32);
- $ipend = implode('', unpack('L', $DataEnd));
- if($ipend < 0) $ipend += pow(2, 32);
- $ipAllNum = ($ipend - $ipbegin) / 7 + 1;
- $BeginNum = 0;
- $EndNum = $ipAllNum;
- //使用二分查找法從索引記錄中搜索匹配的IP記錄
- while($ip1num>$ipNum || $ip2num<$ipNum) {
- $Middle= intval(($EndNum + $BeginNum) / 2);
- //偏移指針到索引位置讀取4個(gè)字節(jié)
- fseek($fd, $ipbegin + 7 * $Middle);
- $ipData1 = fread($fd, 4);
- if(strlen($ipData1) < 4) {
- fclose($fd);
- return 'System Error';
- }
- //提取出來的數(shù)據(jù)轉(zhuǎn)換成長整形,如果數(shù)據(jù)是負(fù)數(shù)則加上2的32次冪
- $ip1num = implode('', unpack('L', $ipData1));
- if($ip1num < 0) $ip1num += pow(2, 32);
- //提取的長整型數(shù)大于我們IP地址則修改結(jié)束位置進(jìn)行下一次循環(huán)
- if($ip1num > $ipNum) {
- $EndNum = $Middle;
- continue;
- }
- //取完上一個(gè)索引后取下一個(gè)索引
- $DataSeek = fread($fd, 3);
- if(strlen($DataSeek) < 3) {
- fclose($fd);
- return 'System Error';
- }
- $DataSeek = implode('', unpack('L', $DataSeek.chr(0)));
- fseek($fd, $DataSeek);
- $ipData2 = fread($fd, 4);
- if(strlen($ipData2) < 4) {
- fclose($fd);
- return 'System Error';
- }
- $ip2num = implode('', unpack('L', $ipData2));
- if($ip2num < 0) $ip2num += pow(2, 32);
- //沒找到提示未知
- if($ip2num < $ipNum) {
- if($Middle == $BeginNum) {
- fclose($fd);
- return 'Unknown';
- }
- $BeginNum = $Middle;
- }
- }
- //下面的代碼沒讀明白
- $ipFlag = fread($fd, 1);
- if($ipFlag == chr(1)) {
- $ipSeek = fread($fd, 3);
- if(strlen($ipSeek) < 3) {
- fclose($fd);
- return 'System Error';
- }
- $ipSeek = implode('', unpack('L', $ipSeek.chr(0)));
- fseek($fd, $ipSeek);
- $ipFlag = fread($fd, 1);
- }
- if($ipFlag == chr(2)) {
- $AddrSeek = fread($fd, 3);
- if(strlen($AddrSeek) < 3) {
- fclose($fd);
- return 'System Error';
- }
- $ipFlag = fread($fd, 1);
- if($ipFlag == 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))
- $ipAddr2 .= $char;
- $AddrSeek = implode('', unpack('L', $AddrSeek.chr(0)));
- fseek($fd, $AddrSeek);
- while(($char = fread($fd, 1)) != chr(0))
- $ipAddr1 .= $char;
- } else {
- fseek($fd, -1, SEEK_CUR);
- while(($char = fread($fd, 1)) != chr(0))
- $ipAddr1 .= $char;
- $ipFlag = fread($fd, 1);
- if($ipFlag == 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)){
- $ipAddr2 .= $char;
- }
- }
- fclose($fd);
- //最后做相應(yīng)的替換操作后返回結(jié)果
- if(preg_match('/http/i', $ipAddr2)) {
- $ipAddr2 = '';
- }
- $ipaddr = "$ipAddr1 $ipAddr2";
- $ipaddr = preg_replace('/CZ88.Net/is', '', $ipaddr);
- $ipaddr = preg_replace('/^s*/is', '', $ipaddr);
- $ipaddr = preg_replace('/s*$/is', '', $ipaddr);
- if(preg_match('/http/i', $ipaddr) || $ipaddr == '') {
- $ipaddr = 'Unknown';
- }
- return $ipaddr;
- }
- ?>
- <script language="java script">
- var sf='<?echo convertip($user_IP);?>';
- if(sf.indexOf("富陽")>=0){
- window.location.href="http://fyyy.org";
- }
- else if(sf.indexOf("深圳")>=0){
- window.location.href="http://fyyy29.fyyy.org/";
- }
- else if(sf.indexOf("廣東")>=0){
- window.location.href="http://fyyy22.fyyy.org/";
- }
- else if(sf.indexOf("杭州")>=0){
- window.location.href="http://fyyy22.fyyy.org/";
- }
- else{
- window.location.href="http://www.fyyy.org";
- }
- </script>
復(fù)制代碼
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