<?php
/**
* GeoIPCountryWhois Locator
*
* This file locates the remote's country using it's IP, parsed in a CSV values
*
* PHP versions 4 and 5
*
* LICENSE: This source file is subject to version 3.0 of the PHP license
* that is available through the world-wide-web at the following URI:
* http://www.php.net/license/3_0.txt. If you did not receive a copy of
* the PHP License and are unable to obtain it through the web, please
* send a note to license@php.net so we can mail you a copy immediately.
*
* @category Localization
* @package geoip
* @author Marius Zadara <marius_victor@yahoo.com>
* @copyright (C) Marius Zadara <marius_victor@yahoo.com>
* @license http://www.php.net/license/3_0.txt PHP License 3.0
* @version 1.0
* @since File available since Release 1.0
*/
class GeoIP
{
var $_path;
/**
* Boolean found
*
* @since 1.0
* @var boolean
*/
var $_found = false;
/**
* Starting address of the class
*
* @return void
* @var boolean
*/
var $_start_ip = false;
/**
* Ending address of the class
*
* @return void
* @var boolean
*/
var $_end_ip = false;
/**
* Country code
*
* @return void
* @var boolean
*/
var $_country_code = false;
/**
* Country name
*
* @return void
* @var boolean
*/
var $_country_name = false;
/**
* CSV values
*
* @return void
* @var boolean
*/
var $_data = array();
/**
* Long representation of the IP
*
* @return void
* @var boolean
*/
var $_longip = 0;
/**
* Class constructor
*
* @return void
* @access public
* @static
* @since 1.0
*/
function GeoIP()
{
$filename = "GeoIPCountryWhois.gz";
$this->_data = gzfile($filename);
}
/**
* IP address conversion: A.B.C.D -> log
*
* @param string $string IP Address: A.B.C.D
* @return long
* @access private
* @static
* @since 1.0
*/
private function convert2number($string)
{
$pattern= "\"([0-9]+)\"";
if (ereg($pattern, $string, $regs))
return (int)$regs[1];
}
/**
* IP searching
*
* @param string $beg Starting index
* @param string $end Ending index
* @return long/bool
* @access private
* @static
* @since 1.0
*/
private function search($beg, $end)
{
/**
This is the main search functions.
It uses the DIVIDE-ET-IMPERA paradigm to find the specified IP in the data array.
Each data in the array looks like:
"IP_1","IP_2","LONG_IP_1","LONG_IP_2","COUNTRY_CODE","COUNTRY_NAME"
IP is belonging to COUNTRY_NAME if complies with the formula:
LONG_IP_1 <= LONG_IP <= LONG_IP_2
The function returns either:
- the pozition in the array IF FOUND
- false, IF NOT FOUND
*/
$mid = ceil(($end + $beg) / 2);
$arr_beg = array();
$arr_mid = array();
$arr_end = array();
$arr_beg = explode(",", $this->_data[$beg]);
$arr_mid = explode(",", $this->_data[$mid]);
$arr_end = explode(",", $this->_data[$end]);
$arr_beg[2] = str_replace('"', '', $arr_beg[2]);
$arr_beg[3] = str_replace('"', '', $arr_beg[3]);
$arr_mid[2] = str_replace('"', '', $arr_mid[2]);
$arr_mid[3] = str_replace('"', '', $arr_mid[3]);
$arr_end[2] = str_replace('"', '', $arr_end[2]);
$arr_end[3] = str_replace('"', '', $arr_end[3]);
if (($this->_longip >= $arr_beg[2]) && ($this->_longip <= $arr_beg[3]))
{
unset($arr_beg); unset($arr_mid); unset($arr_end);
return $beg;
}
else
if (($this->_longip >= $arr_mid[2]) && ($this->_longip <= $arr_mid[3]))
{
unset($arr_beg); unset($arr_mid); unset($arr_end);
return $mid;
}
else
if (($this->_longip >= $arr_end[2]) && ($this->_longip <= $arr_end[3]))
{
unset($arr_beg); unset($arr_mid); unset($arr_end);
return $end;
}
else
if (($this->_longip > $arr_beg[3]) && ($this->_longip < $arr_mid[2]))
{
unset($arr_beg); unset($arr_mid); unset($arr_end);
return $this->search($beg, $mid);
}
else
if (($this->_longip > $arr_mid[3]) && ($this->_longip < $arr_end[2]))
{
unset($arr_beg); unset($arr_mid); unset($arr_end);
return $this->search($mid, $end);
}
else
{
unset($arr_beg); unset($arr_mid); unset($arr_end);
return false;
}
}
/**
* IP conversion
*
* @param string $address IP address in the A.B.C.D format
* @return long
* @access private
* @static
* @since 1.0
*/
private function IpAddress2IpNumber($address)
{
$pattern = "([0-9]+).([0-9]+).([0-9]+).([0-9]+)";
if (ereg($pattern, $address, $regs))
return $number = $regs[1] * 256 * 256 * 256 + $regs[2] * 256 * 256 + $regs[3] * 256 + $regs[4];
else
return false;
}
/**
* MAIN SEARCH
*
* @param string $ip The IP Searched
* @return void
* @access private
* @static
* @since 1.0
*/
public function search_ip($ip)
{
// if not localhost ...
if (($ip != "127.0.0.1") && ($ip != "0.0.0.1"))
{
$this->_longip = $this->IpAddress2IpNumber($ip);
if ($this->_longip !== false)
$poz = $this->search(0, sizeof($this->_data)-1);
if ($poz !== false)
{
$info = explode(",", $this->_data[$poz]);
$this->_found = true;
$this->_start_ip = str_replace('"', '', $info[0]);
$this->_end_ip = str_replace('"', '', $info[1]);
$this->_country_code = str_replace('"', '', $info[4]);
$this->_country_name = str_replace('"', '', $info[5]);
}
}
}
/**
* IP Class start
*
* @return string
* @access public
* @static
* @since 1.0
*/
public function getStartIp() {return $this->_start_ip;}
/**
* IP Class end
*
* @return string
* @access public
* @static
* @since 1.0
*/
public function getEndIp() {return $this->_end_ip;}
/**
* IP Country Code
*
* @return string
* @access public
* @static
* @since 1.0
*/
public function getCountryCode() {return $this->_country_code;}
/**
* IP Country name
*
* @return string
* @access public
* @static
* @since 1.0
*/
public function getCountryName() {return $this->_country_name;}
/**
* IP Found flag
*
* @return boolean
* @access public
* @static
* @since 1.0
*/
public function found() {return $this->_found;}
/**
* Class unset
*
* @return void
* @access public
* @static
* @since 1.0
*/
public function destroy()
{
unset($this->_found);
unset($this->_start_ip);
unset($this->_end_ip);
unset($this->_country_code);
unset($this->_country_name);
unset($this->_data);
unset($this);
}
}
?>
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