分析用户ip归属地-PHP源码

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 ( $this->EndIpOff+4) ;
         //echo sprintf(&＃39;EndIpOffset=(%x)&＃39;,$this->EndIpOff );
         $this->Local=( 1 == $this->CountryFlag )? &＃39;&＃39; : $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($offset<12)
        return &＃39;&＃39;;
     @fseek($this->fp , $offset , SEEK_SET ) ;
 
     return $this->getStr();
    }
    function getStr ( )
    {
     $str=&＃39;&＃39; ;
     while ( 1 ) {
        $c=fgetc ( $this->fp ) ;
        if(ord($c[0])== 0 )
         break ;
        $str.= $c ;
     }
     return $str ;
    }
    function qqwry ($dotip=&＃39;&＃39;) {
        if( !is_string($dotip) || $dotip==&＃39;&＃39;){return;}
                if(preg_match("/^127/",$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= $RecordCount;
     while ($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=&＃39;未知&＃39; ;
        $this->Local=&＃39;&＃39; ;
     }
     fclose ( $this->fp );
        return $nRet ;
    }
    function IpToInt($Ip) {
     $array=explode(&＃39;.&＃39;,$Ip);
     $Int=($array[0] * 256*256*256) + ($array[1]*256*256) + ($array[2]*256) + $array[3];
     return $Int;
    }
}
function GetIP(){//获取IP
    return $_SERVER[REMOTE_ADDR]?$_SERVER[REMOTE_ADDR]:$GLOBALS[HTTP_SERVER_VARS][REMOTE_ADDR];
}
?>