php根据IP显示地区代码-PHP源码

define('IPDATA_MINI', PHPCMS_ROOT.'include/ipdata/mini.Dat');
define('IPDATA_FULL', PHPCMS_ROOT.'include/ipdata/QQWry.Dat');

class ip_area
{
var $fp = NULL;
var $func;
var $offset;
var $index;

function ip_area()
{
if(@file_exists(IPDATA_MINI))
{
$this->func = 'data_mini';
$this->fp = @fopen(IPDATA_MINI, 'rb');
$this->offset = unpack('Nlen', fread($this->fp, 4));
$this->index = fread($this->fp, $this->offset['len'] - 4);
}
elseif(@file_exists(IPDATA_FULL))
{
$this->func = 'data_full';
$this->fp = @fopen(IPDATA_FULL, 'rb');
}
}

function get($ip)
{
$return = '';
if(preg_match("/^d{1,3}.d{1,3}.d{1,3}.d{1,3}$/", $ip))
{
$iparray = explode('.', $ip);
if($iparray[0] == 10 || $iparray[0] == 127 || ($iparray[0] == 192 && $iparray[1] == 168) || ($iparray[0] == 172 && ($iparray[1] >= 16 && $iparray[1] <= 31)))
{
$return = 'LAN';
}
elseif($iparray[0] > 255 || $iparray[1] > 255 || $iparray[2] > 255 || $iparray[3] > 255)
{
$return = 'Invalid IP Address';
}
else
{
$return = $this->func ? $this->{$this->func}($ip) : '';
if(strpos($return, ' ') !== false) $return = substr($return, 0, strpos($return,' '));
}
if(strtolower(CHARSET) == 'utf-8') $return = iconv('gbk', 'utf-8', $return);
}
return $return;
}

function data_mini($ip)
{
$ipdot = explode('.', $ip);
$ipdot[0] = (int)$ipdot[0];
$ipdot[1] = (int)$ipdot[1];
$ip = pack('N', ip2long($ip));
$length = $this->offset['len'] - 1028;
$start = unpack('Vlen', $this->index[$ipdot[0] * 4] . $this->index[$ipdot[0] * 4 + 1] . $this->index[$ipdot[0] * 4 + 2] . $this->index[$ipdot[0] * 4 + 3]);
for($start = $start['len'] * 8 + 1024; $start <$length; $start += 8)
{
if($this->index{$start} . $this->index{$start + 1} . $this->index{$start + 2} . $this->index{$start + 3} >= $ip)
{
$this->index_offset = unpack('Vlen', $this->index{$start + 4} . $this->index{$start + 5} . $this->index{$start + 6} . "x0");
$this->index_length = unpack('Clen', $this->index{$start + 7});
break;
}
}
fseek($this->fp, $this->offset['len'] + $this->index_offset['len'] - 1024);
if($this->index_length['len'])
{
return str_replace('- ', '', fread($this->fp, $this->index_length['len']));
}
else
{
return 'Unknown';
}
}

function data_full($ip)
{
rewind($this->fp);
$ip = explode('.', $ip);
$ipNum = $ip[0] * 16777216 + $ip[1] * 65536 + $ip[2] * 256 + $ip[3];
if(!($DataBegin = fread($this->fp, 4)) || !($DataEnd = fread($this->fp, 4)) ) return;
@$ipbegin = implode('', unpack('L', $DataBegin));
if($ipbegin <0) $ipbegin += pow(2, 32);
@$ipend = implode('', unpack('L', $DataEnd));
if($ipend <0) $ipend += pow(2, 32);
$ipAllNum = ($ipend - $ipbegin) / 7 + 1;
$BeginNum = $ip2num = $ip1num = 0;
$ipAddr1 = $ipAddr2 = '';
$EndNum = $ipAllNum;
while($ip1num > $ipNum || $ip2num <$ipNum)
{
$Middle= intval(($EndNum + $BeginNum) / 2);
fseek($this->fp, $ipbegin + 7 * $Middle);
$ipData1 = fread($this->fp, 4);
if(strlen($ipData1) <4)
{
fclose($this->fp);
return 'System Error';
}
$ip1num = implode('', unpack('L', $ipData1));
if($ip1num <0) $ip1num += pow(2, 32);
if($ip1num > $ipNum)
{
$EndNum = $Middle;
continue;
}
$DataSeek = fread($this->fp, 3);
if(strlen($DataSeek) <3)
{
fclose($this->fp);
return 'System Error';
}
$DataSeek = implode('', unpack('L', $DataSeek.chr(0)));
fseek($this->fp, $DataSeek);
$ipData2 = fread($this->fp, 4);
if(strlen($ipData2) <4)
{
fclose($this->fp);
return 'System Error';
}
$ip2num = implode('', unpack('L', $ipData2));
if($ip2num <0) $ip2num += pow(2, 32);
if($ip2num <$ipNum)
{
if($Middle == $BeginNum)
{
fclose($this->fp);
return 'Unknown';
}
$BeginNum = $Middle;
}
}
$ipFlag = fread($this->fp, 1);
if($ipFlag == chr(1))
{
$ipSeek = fread($this->fp, 3);
if(strlen($ipSeek) <3)
{
fclose($this->fp);
return 'System Error';
}
$ipSeek = implode('', unpack('L', $ipSeek.chr(0)));
fseek($this->fp, $ipSeek);
$ipFlag = fread($this->fp, 1);
}
if($ipFlag == chr(2))
{
$AddrSeek = fread($this->fp, 3);
if(strlen($AddrSeek) <3)
{
fclose($this->fp);
return 'System Error';
}
$ipFlag = fread($this->fp, 1);
if($ipFlag == chr(2)) {
$AddrSeek2 = fread($this->fp, 3);
if(strlen($AddrSeek2) <3)
{
fclose($this->fp);
return 'System Error';
}
$AddrSeek2 = implode('', unpack('L', $AddrSeek2.chr(0)));
fseek($this->fp, $AddrSeek2);
}
else
{
fseek($this->fp, -1, SEEK_CUR);
}
while(($char = fread($this->fp, 1)) != chr(0))
$ipAddr2 .= $char;
$AddrSeek = implode('', unpack('L', $AddrSeek.chr(0)));
fseek($this->fp, $AddrSeek);
while(($char = fread($this->fp, 1)) != chr(0))
$ipAddr1 .= $char;
}
else
{
fseek($this->fp, -1, SEEK_CUR);
while(($char = fread($this->fp, 1)) != chr(0))
$ipAddr1 .= $char;
$ipFlag = fread($this->fp, 1);
if($ipFlag == chr(2))
{
$AddrSeek2 = fread($this->fp, 3);
if(strlen($AddrSeek2) <3)
{
fclose($this->fp);
return 'System Error';
}
$AddrSeek2 = implode('', unpack('L', $AddrSeek2.chr(0)));
fseek($this->fp, $AddrSeek2);
}
else
{
fseek($this->fp, -1, SEEK_CUR);
}
while(($char = fread($this->fp, 1)) != chr(0))
$ipAddr2 .= $char;
}
if(preg_match('/http/i', $ipAddr2)) $ipAddr2 = '';
$ipaddr = "$ipAddr1 $ipAddr2";
$ipaddr = preg_replace('/CZ88.NET/is', '', $ipaddr);
$ipaddr = preg_replace('/^s*/is', '', $ipaddr);
$ipaddr = preg_replace('/s*$/is', '', $ipaddr);
if(preg_match('/http/i', $ipaddr) || $ipaddr == '') $ipaddr = 'Unknown';
return ''.$ipaddr;
}

function close()
{
@fclose($this->fp);
}
}
?>