php ip转换省市县

http://www.cz88.net/ip/

http://www.ttlsa.com/php/php_cunzhen-ipdata/

#　　wget h http://6.scdx3.crsky.com/201307/qqwry0715.zip
#　　unzip qqwry0715.zip
#　　mv ip/qqwry.dat /data/site/test.ttlsa.com/qqwry.dat

p
class cls_ipAddress{
private $fp;
private $firstip;
private $lastip;
private $totalip;

public function __construct($filename="qqwry.dat"){
$this->fp=0;
if(($this->fp=@fopen($filename,"rb"))!==false){
$this->firstip=$this->getlong();
$this->lastip=$this->getlong();
$this->totalip=($this->lastip-$this->firstip)/7;
register_shutdown_function(array(&$this,"__destruct"));
}
}

public function __destruct(){
if($this->fp){
@fclose($this->fp);
}
$this->fp=0;
}

private function getlong(){
$result=unpack("Vlong",fread($this->fp,4));
return $result["long"];
}

private function getlong3(){
$result=unpack("Vlong",fread($this->fp,3).chr(0));
return $result["long"];
}

private function packip($ip){
return pack("N",intval(ip2long($ip)));
}

private function getstring($data=""){
$char=fread($this->fp,1);
while(ord($char)>0){
$data.=$char;
$char=fread($this->fp,1);
}
return $data;
}

private function getarea(){
$byte=fread($this->fp,1);
switch(ord($byte)){
case 0:
$operators="";
break;
case 1:
case 2:
fseek($this->fp,$this->getlong3());
$operators=$this->getstring();
break;
default:
$operators=$this->getstring($byte);
break;}
return $operators;
}

public function getlocation($ip){
if(!$this->fp){return null;}
$location["ip"]=gethostbyname($ip);
$ip=$this->packip($location["ip"]);
$l=0;
$u=$this->totalip;
$findip=$this->lastip;
while($l<=$u){
$i=floor(($l+$u)/2);
fseek($this->fp,$this->firstip+$i*7);
$startip=strrev(fread($this->fp,4));
if($ip<$startip){
$u=$i-1;
}else{
fseek($this->fp,$this->getlong3());
$endip=strrev(fread($this->fp,4));
if($ip>$endip){
$l=$i+1;
}else{
$findip=$this->firstip+$i*7;
break;
}
}
}
fseek($this->fp,$findip);
$location["startip"]=long2ip($this->getlong());
$offset=$this->getlong3();
fseek($this->fp,$offset);
$location["endip"]=long2ip($this->getlong());
$byte=fread($this->fp,1);
switch(ord($byte)){
case 1:
$countryOffset=$this->getlong3();
fseek($this->fp,$countryOffset);
$byte=fread($this->fp,1);
switch(ord($byte)){
case 2:
fseek($this->fp,$this->getlong3());
$location["area"]=$this->getstring();
fseek($this->fp,$countryOffset+4);
$location["operators"]=$this->getarea();
break;
default:
$location["area"]=$this->getstring($byte);
$location["operators"]=$this->getarea();
break;}
break;
case 2:
fseek($this->fp,$this->getlong3());
$location["area"]=$this->getstring();
fseek($this->fp,$offset+8);
$location["operators"]=$this->getarea();
break;
default:
$location["area"]=$this->getstring($byte);
$location["operators"]=$this->getarea();
break;}
if($location["area"]=="CZ88.NET"){
$location["area"]="未知";
}
if($location["operators"]=="CZ88.NET"){
$location["operators"]="未知";
}
return $location;
}
}