QQwry.dat格式区分与查询IP位置的PHP程序

$flag == 2 ) {
$buf = fread ($this->fp , 3 ) ;
if ($flag == 2 ){
$this->CountryFlag = 2 ;
$this->EndIpOff = $offset - 4 ;
}
$offset = ord($buf[0]) + (ord($buf[1])*256) + (ord($buf[2])* 256*256);
}else{
break ;
}

}
if ( $offset < 12 )
return '';
@fseek($this->fp , $offset , SEEK_SET ) ;
return $this->getStr();
}
function getStr ( )
{
$str = '' ;
while ( 1 ) {
$c = fgetc ( $this->fp ) ;
if ( ord ( $c[0] ) == 0)
 break ;
$str .= $c ;
}
return $str ;
}


function qqwry ($dotip) {

$nRet;
$ip = IpToInt ( $dotip );

$this->fp= @fopen(QQWRY, "rb");
if ($this->fp == NULL) {
$szLocal= "OpenFileError";
return 1;

}
@fseek ( $this->fp , 0 , SEEK_SET ) ;
$buf = fread ( $this->fp , 8 ) ;
$this->FirstStartIp = ord($buf[0]) + (ord($buf[1])*256) + (ord($buf[2])*256*256) + (ord($buf[3])*256*256*256);
$this->LastStartIp= ord($buf[4]) + (ord($buf[5])*256) + (ord($buf[6])*256*256) + (ord($buf[7])*256*256*256);

$RecordCount= floor( ( $this->LastStartIp - $this->FirstStartIp ) / 7);
if ($RecordCount <= 1){
$this->Country = "FileDataError";
fclose ( $this->fp ) ;
return 2 ;
}

$RangB= 0;
$RangE= $RecordCount;
// Match ...
while ($RangB < $RangE-1)
{
$RecNo= floor(($RangB + $RangE) / 2);
$this->getStartIp ( $RecNo ) ;

if ( $ip == $this->StartIp )
{
$RangB = $RecNo ;
break ;
}
if ( $ip > $this->StartIp)
$RangB= $RecNo;
else
$RangE= $RecNo;
}
$this->getStartIp ( $RangB ) ;
$this->getEndIp ( ) ;

if ( ( $this->StartIp<= $ip ) && ( $this->EndIp >= $ip ) ){
$nRet = 0 ;
$this->getCountry ( ) ;
//这样不太好..............所以..........
$this->Local = str_replace("（我们一定要解放台湾！！！）", "", $this->Local);

}else {
$nRet = 3 ;
$this->Country = '未知' ;
$this->Local = '' ;
}
fclose ( $this->fp ) ;
return $nRet ;
}
}


function ip2location ( $ip )
{
$wry = new TQQwry ;
$nRet = $wry->qqwry ( $ip );
//可以利用 $nRet做一些事情，我是让他自动记录未知IP到一个表,代码就不写了。
return $wry->Country.$wry->Local ;
}

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