www.0g.com/source/ip/qqwry.php

<?php   
define('__QQWRY__' , dirname(__FILE__)."/QQWry.Dat");  
//echo __QQWRY__; 
class QQWry{ 
    var $StartIP=0; 
    var $EndIP=0; 
    var $Country=''; 
    var $Local=''; 
  
    var $CountryFlag=0; // 标识 Country位置 
             // 0x01,随后3字节为Country偏移,没有Local 
             // 0x02,随后3字节为Country偏移，接着是Local 
             // 其他,Country,Local,Local有类似的压缩。可能多重引用。 
    var $fp; 
  
    var $FirstStartIp=0; 
    var $LastStartIp=0; 
    var $EndIpOff=0 ; 
  
    function getStartIp($RecNo){ 
     $offset=$this->FirstStartIp+$RecNo * 7 ; 
     @fseek($this->fp,$offset,SEEK_SET) ; 
     $buf=fread($this->fp ,7) ; 
     $this->EndIpOff=ord($buf[4]) + (ord($buf[5])*256) + (ord($buf[6])* 256*256); 
     $this->StartIp=ord($buf[0]) + (ord($buf[1])*256) + (ord($buf[2])*256*256) + (ord($buf[3])*256*256*256); 
     return $this->StartIp; 
    } 
  
    function getEndIp(){ 
     @fseek ( $this->fp , $this->EndIpOff , SEEK_SET ) ; 
     $buf=fread ( $this->fp , 5 ) ; 
     $this->EndIp=ord($buf[0]) + (ord($buf[1])*256) + (ord($buf[2])*256*256) + (ord($buf[3])*256*256*256); 
     $this->CountryFlag=ord ( $buf[4] ) ; 
     return $this->EndIp ; 
    } 
  
    function getCountry(){ 
     switch ( $this->CountryFlag ) { 
        case 1: 
        case 2: 
         $this->Country=$this->getFlagStr ( $this->EndIpOff+4) ; 
         //echo sprintf('EndIpOffset=(%x)',$this->EndIpOff ); 
         $this->Local=( 1 == $this->CountryFlag )? '' : $this->getFlagStr ( $this->EndIpOff+8); 
         break ; 
        default : 
         $this->Country=$this->getFlagStr ($this->EndIpOff+4) ; 
         $this->Local=$this->getFlagStr ( ftell ( $this->fp )) ; 
     } 
    } 
  
  
    function getFlagStr ($offset){ 
     $flag=0 ; 
     while(1){ 
        @fseek($this->fp ,$offset,SEEK_SET) ; 
        $flag=ord(fgetc($this->fp ) ) ; 
        if ( $flag == 1 || $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 ( $this->fp ) ; 
        //echo "$cn" ; 
  
        if(ord($c[0])== 0 ) 
         break ; 
        $str.= $c ; 
     } 
     //echo "$str n"; 
     return $str ; 
    } 
  
  
function qqwrys($dotip = '')
    {
        if (! $dotip)
            return;
        if (preg_match("/^(127)/", $dotip)) {
            $this->Country = 本地网络;
            return;
        } elseif (preg_match("/^(192)/", $dotip)) {
            $this->Country = 局域网;
            return;
        }
        $nRet;
        $ip = $this->IpToInt($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();
            $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);
        $this->Country = preg_replace("/(CZ88.NET)|(纯真网络)/", "", $this->Country);
        $this->Local = preg_replace("/(CZ88.NET)|(纯真网络)/", "", $this->Local);
        return $nRet;
    } 
  
    function IpToInt($Ip) { 
     $array=explode('.',$Ip); 
     $Int=($array[0] * 256*256*256) + ($array[1]*256*256) + ($array[2]*256) + $array[3]; 
     return $Int; 
    } 
}