PHP判断IP并转跳到相应城市分站的方法

<?php  
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 $str ;  
  }  
  function qqwry ($dotip='') {  
    if( !is_string($dotip) || $dotip==''){return;}  
    if(preg_match("/^127/",$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 ( ) ;  
    //这样不太好..............所以..........  
    $this->Local=str_replace("area error", "",$this->Local);  
   }  
   else{  
    $nRet=3 ;  
    $this->Country='未知' ;  
    $this->Local='' ;  
   }  
   fclose ( $this->fp );  
$this->Country=preg_replace("/(CZ88.NET)|(纯真网络)/","局域网/未知",$this->Country);
$this->Local=preg_replace("/(CZ88.NET)|(纯真网络)/","局域网/未知",$this->Local);  
//////////////看看 $nRet在上面的值是什么0和3，于是将下面的行注释掉  
    return $nRet ;  
//return "$this->Country $this->Local";#如此直接返回位置和国家便可以了  
  }  
  function IpToInt($Ip) {  
   $array=explode('.',$Ip);  
   $Int=($array[0] * 256*256*256) + ($array[1]*256*256) + ($array[2]*256) + $array[3];
   return $Int;  
  }  
 }  
?>

$QQWry=new QQWry;
$QQWry->QQWry("60.31.95.255");
$country = $QQWry->Country;
echo $QQWry->Country.",".$QQWry->Local;