文件目录：
ipLocation
-----qqwry
----------QQWry.Dat
-----ipCity.class.php
ipCity.class.php文件代码：
复制代码 代码如下:
<?php
class ipCity {
/**
* 根据ip地址获取对应所在城市
* @param type $userip 用户IP地址
* @return string
*/
public function getCity( $userip, $dat_path = "" ) {
//IP数据库路径，这里用的是QQ IP数据库 20110405 纯真版
empty( $dat_path ) && $dat_path = FCPATH . "plugin/ipLocation/qqwry/QQWry.Dat";
//判断IP地址是否有效
if ( preg_match( "/^([0-9]{1,3}.){3}[0-9]{1,3}$/", $userip ) == 0 ) {
return "IP Address Invalid";
}
//打开IP数据库
if ( !$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 == "" ) {
$useripaddr = "No Data";
} elseif ( !$this->is_utf8( $useripaddr ) ) {
$useripaddr = iconv( "GBK", "UTF-8", $useripaddr );
}
return $useripaddr;
}
/**
* 判断是否我utf-8编码的字符串
* @param type $string
* @return boolean
*/
private function is_utf8( $string ) {
if ( preg_match( "/^([" . chr( 228 ) . "-" . chr( 233 ) . "]{1}[" . chr( 128 ) . "-" . chr( 191 ) . "]{1}[" . chr( 128 ) . "-" . chr( 191 ) . "]{1}){1}/", $string ) == true || preg_match( "/([" . chr( 228 ) . "-" . chr( 233 ) . "]{1}[" . chr( 128 ) . "-" . chr( 191 ) . "]{1}[" . chr( 128 ) . "-" . chr( 191 ) . "]{1}){1}$/", $string ) == true || preg_match( "/([" . chr( 228 ) . "-" . chr( 233 ) . "]{1}[" . chr( 128 ) . "-" . chr( 191 ) . "]{1}[" . chr( 128 ) . "-" . chr( 191 ) . "]{1}){2,}/", $string ) == true ) {
return true;
} else {
return false;
}
}
}
QQWry.Dat文件下载地址：http://xiazai.jb51.net/201311/yuanma/qqwry.dat(jb51.net).zip
使用演示：
复制代码 代码如下:
include FCPATH . "plugin/ipLocation/ipCity.class.php";
$city = new ipCity();
$addr = $city->getCity( "172.0.0.1" );
echo $addr; // echo 本地地址
