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;