PHP判断IP并转跳到相应城市分站的方法

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,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,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,SEEK_SET );
$buf=fread ( $this->fp,8 );
$this->FirstStartIp=ord($buf[0]) + (ord($buf[1])256) + (ord($buf[2])256256) + (ord($buf[3])256256256);
$this->LastStartIp=ord($buf[4]) + (ord($buf[5])256) + (ord($buf[6])256256) + (ord($buf[7])256256256);
$RecordCount= floor(($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);
$this->Local=preg_replace("/(CZ88.NET)|(纯真网络)/",$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] 256256256) + ($array[1]256256) + ($array[2]256) + $array[3];
return $Int;
}
}
?>

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