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文件目录:
ipLocation
-----qqwry
----------QQWry.Dat
-----ipCity.class.php
ipCity.class.php文件代码:
[U]复制代码[/U] 代码如下:
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 $useripNum || $userip2num $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 ) 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:
[U]复制代码[/U] 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
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