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<!--?php
//返回当前IP的城市字符串
function convertip($ip) {
//IP数据文件路径
$dat_path = 'QQWry.Dat';
//检查IP地址
if(!preg_match("/^(d{1,2}|1dd|2[0-4]d|25[0-5]).(d{1,2}|1dd|2[0-4]d|25[0-5]).(d{1,2}|1dd|2[0-4]d|25[0-5]).(d{1,2}|1dd|2[0-4]d|25[0-5])$/", $ip)) {
return 'IP Address Error';
}
//打开IP数据文件
if(!$fd = @fopen($dat_path, 'rb')){
return 'IP date file not exists or access denied';
}
//分解IP进行运算，得出整形数
$ip = explode('.', $ip);
$ipNum = $ip[0] * 16777216 + $ip[1] * 65536 + $ip[2] * 256 + $ip[3];
//获取IP数据索引开始和结束位置
$DataBegin = fread($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 = $ipAllNum;
//使用二分查找法从索引记录中搜索匹配的IP记录
while($ip1num-->$ipNum || $ip2num<$ipNum) {
$Middle= intval(($EndNum + $BeginNum) / 2);
//偏移指针到索引位置读取4个字节
fseek($fd, $ipbegin + 7 * $Middle);
$ipData1 = fread($fd, 4);
if(strlen($ipData1) < 4) {
fclose($fd);
return 'System 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
$ip1num = implode('', unpack('L', $ipData1));
if($ip1num < 0) $ip1num += pow(2, 32);
//提取的长整型数大于我们IP地址则修改结束位置进行下一次循环
if($ip1num > $ipNum) {
$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 '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) $ip2num += pow(2, 32);
//没找到提示未知
if($ip2num < $ipNum) {
if($Middle == $BeginNum) {
fclose($fd);
return 'Unknown';
}
$BeginNum = $Middle;
}
}
$ipFlag = fread($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);
//最后做相应的替换操作后返回结果
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 $ipaddr;
}
//查找字符串
function findstr($str, $substr)
{
$m = strlen($str);
$n = strlen($substr );
if ($m < $n) return false ;
for ($i=0; $i <=($m-$n+1); $i ++){
$sub = substr( $str, $i, $n);
if ( strcmp($sub, $substr) == 0) return true;
}
return false ;
}
?>
<!--?php
$Clientip=$_SERVER["REMOTE_ADDR"];
$ClientSity=convertip($Clientip);
if (findstr($ClientSity,"北京")){
//out.print("beijing");
Header("Location: http://www.qq.com");
}else{
//out.print("false beijing");
Header("Location: http://www.163.com");
}
?-->
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