IP地理位置查询类(纯真IP地址库)

由于使用UTF8编码,如果使用纯真IP地址库的话,需要对返回结果进行编码转换
纯真IP地址库 http://www.cz88.net/ 安装完成后,到安装目录把 qqwry.dat 拷贝出来

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<?php
/**
* IP 地理位置查询类
*/
class IpLocation
{
private $_provinces = ['黑龙江省', '辽宁省', '吉林省', '河北省', '河南省', '湖北省', '湖南省', '山东省',
'山西省', '陕西省', '安徽省', '浙江省', '江苏省', '福建省', '广东省', '海南省', '四川省', '云南省', '贵州省',
'青海省', '甘肃省', '江西省', '台湾省', '内蒙古', '宁夏', '新疆', '西藏', '广西', '北京市', '上海市',
'天津市', '重庆市', '香港', '澳门'];
private $_filterCity = ['北京市', '上海市', '天津市', '重庆市'];

/**
* qqwry.dat文件指针
*
* @var resource
*/
private $fp;

/**
* 第一条IP记录的偏移地址
*
* @var int
*/
private $firstip;

/**
* 最后一条IP记录的偏移地址
*
* @var int
*/
private $lastip;

/**
* IP记录的总条数(不包含版本信息记录)
*
* @var int
*/
private $totalip;

/**
* 构造函数,打开 qqwry.dat 文件并初始化类中的信息
*
* @param string $filename
* @return IpLocation
*/
public function __construct($filename = 'qqwry.dat')
{
$this->fp = 0;
if (($this->fp = fopen(dirname(__FILE__) . '/' . $filename, 'rb')) !== false) {
$this->firstip = $this->getlong();
$this->lastip = $this->getlong();
$this->totalip = ($this->lastip - $this->firstip) / 7;

// 注册析构函数,使其在程序执行结束时执行
register_shutdown_function(array(&$this, '__destruct'));
}
}

/**
* 返回读取的长整型数
*
* @access private
* @return int
*/
private function getlong()
{
// 将读取的little-endian编码的4个字节转化为长整型数
$result = unpack('Vlong', fread($this->fp, 4));
return $result['long'];
}

/**
* 返回读取的3个字节的长整型数
*
* @access private
* @return int
*/
private function getlong3()
{
// 将读取的little-endian编码的3个字节转化为长整型数
$result = unpack('Vlong', fread($this->fp, 3) . chr(0));
return $result['long'];
}

/**
* 返回压缩后可进行比较的IP地址
*
* @access private
* @param string $ip
* @return string
*/
private function packip($ip)
{
// 将IP地址转化为长整型数,如果在PHP5中,IP地址错误,则返回False
// 这时intval将Flase转化为整数-1,之后压缩成big-endian编码的字符串
return pack('N', intval(ip2long($ip)));
}

/**
* 返回读取的字符串
*
* @access private
* @param string $data
* @return string
*/
private function getstring($data = '')
{
$char = fread($this->fp, 1);
while (ord($char) > 0) { // 字符串按照C格式保存,以\0结束
$data .= $char; // 将读取的字符连接到给定字符串之后
$char = fread($this->fp, 1);
}
return $data;
}

/**
* 返回地区信息
*
* @access private
* @return string
*/
private function getarea()
{
$byte = fread($this->fp, 1); // 标志字节
switch (ord($byte)) {
case 0: // 没有区域信息
$area = '';
break;
case 1:
case 2: // 标志字节为1或2,表示区域信息被重定向
fseek($this->fp, $this->getlong3());
$area = $this->getstring();
break;
default: // 否则,表示区域信息没有被重定向
$area = $this->getstring($byte);
break;
}
return $area;
}

/**
* 根据所给 IP 地址或域名返回所在地区信息
*
* @access public
* @param string $ip
* @return array
*/
public function getlocation($ip, $convert_utf8 = true)
{
if (!$this->fp) return null; // 如果数据文件没有被正确打开,则直接返回空
$location['ip'] = gethostbyname($ip); // 将输入的域名转化为IP地址
$ip = $this->packip($location['ip']); // 将输入的IP地址转化为可比较的IP地址,不合法的IP地址会被转化为255.255.255.255

// 对分搜索
$l = 0; // 搜索的下边界
$u = $this->totalip; // 搜索的上边界
$findip = $this->lastip; // 如果没有找到就返回最后一条IP记录(qqwry.Dat的版本信息)
while ($l <= $u) { // 当上边界小于下边界时,查找失败
$i = floor(($l + $u) / 2); // 计算近似中间记录
fseek($this->fp, $this->firstip + $i * 7);
$beginip = strrev(fread($this->fp, 4)); // 获取中间记录的开始IP地址,strrev函数在这里的作用是将little-endian的压缩IP地址转化为big-endian的格式,以便用于比较,后面相同
if ($ip < $beginip) { // 用户的IP小于中间记录的开始IP地址时
$u = $i - 1; // 将搜索的上边界修改为中间记录减一
} else {
fseek($this->fp, $this->getlong3());
$endip = strrev(fread($this->fp, 4)); // 获取中间记录的结束IP地址
if ($ip > $endip) { // 用户的IP大于中间记录的结束IP地址时
$l = $i + 1; // 将搜索的下边界修改为中间记录加一
} else { // 用户的IP在中间记录的IP范围内时
$findip = $this->firstip + $i * 7;
break; // 则表示找到结果,退出循环
}
}
}

// 获取查找到的IP地理位置信息
fseek($this->fp, $findip);
$location['beginip'] = long2ip($this->getlong()); // 用户IP所在范围的开始地址
$offset = $this->getlong3();
fseek($this->fp, $offset);
$location['endip'] = long2ip($this->getlong()); // 用户IP所在范围的结束地址
$byte = fread($this->fp, 1); // 标志字节
switch (ord($byte)) {
case 1: // 标志字节为1,表示国家和区域信息都被同时重定向
$countryOffset = $this->getlong3(); // 重定向地址
fseek($this->fp, $countryOffset);
$byte = fread($this->fp, 1); // 标志字节
switch (ord($byte)) {
case 2: // 标志字节为2,表示国家信息又被重定向
fseek($this->fp, $this->getlong3());
$location['country'] = $this->getstring();
fseek($this->fp, $countryOffset + 4);
$location['area'] = $this->getarea();
break;
default: // 否则,表示国家信息没有被重定向
$location['country'] = $this->getstring($byte);
$location['area'] = $this->getarea();
break;
}
break;
case 2: // 标志字节为2,表示国家信息被重定向
fseek($this->fp, $this->getlong3());
$location['country'] = $this->getstring();
fseek($this->fp, $offset + 8);
$location['area'] = $this->getarea();
break;
default: // 否则,表示国家信息没有被重定向
$location['country'] = $this->getstring($byte);
$location['area'] = $this->getarea();
break;
}
if (trim($location['country']) == 'CZ88.NET') { // CZ88.NET表示没有有效信息
$location['country'] = '未知';
}
if (trim($location['area']) == 'CZ88.NET') {
$location['area'] = '';
}
if ($convert_utf8) {
$location['country'] = iconv('GB2312', 'UTF-8//IGNORE', $location['country']);
$location['area'] = iconv('GB2312', 'UTF-8//IGNORE', $location['area']);
}
foreach($this->_provinces as $province) {
if (strpos($location['country'], $province) === 0) {
$location['province'] = $province;
if (in_array($province, $this->_filterCity)) {
$location['city'] = $province;
} else {
$location['city'] = str_replace($province, '', $location['country']);
}
empty($location['city']) && $location['city'] = $province;
break;
}
}
// country 错误值:[未知,局域网,IANA]
return $location;
}

/**
* 析构函数,用于在页面执行结束后自动关闭打开的文件
*/
public function __destruct() {
if ($this->fp) {
fclose($this->fp);
}
$this->fp = 0;
}
}

$ip_location_obj = new IpLocation();
echo '<pre>';
$address = $ip_location_obj->getlocation('127.0.0.1');
print_r($address);
$address = $ip_location_obj->getlocation('10.10.0.0');
print_r($address);
$address = $ip_location_obj->getlocation('123.164.3.9');
print_r($address);
$address = $ip_location_obj->getlocation('175.160.104.123');
print_r($address);
$address = $ip_location_obj->getlocation('122.136.104.123');
print_r($address);
$address = $ip_location_obj->getlocation('106.112.104.123');
print_r($address);
$address = $ip_location_obj->getlocation('123.8.104.123');
print_r($address);
$address = $ip_location_obj->getlocation('58.48.104.123');
print_r($address);
$address = $ip_location_obj->getlocation('222.240.104.123');
print_r($address);
$address = $ip_location_obj->getlocation('182.32.104.123');
print_r($address);
$address = $ip_location_obj->getlocation('118.72.104.123');
print_r($address);
$address = $ip_location_obj->getlocation('202.200.104.123');
print_r($address);
$address = $ip_location_obj->getlocation('60.168.104.123');
print_r($address);
$address = $ip_location_obj->getlocation('115.224.104.123');
print_r($address);
$address = $ip_location_obj->getlocation('117.80.104.123');
print_r($address);
$address = $ip_location_obj->getlocation('120.32.104.123');
print_r($address);
$address = $ip_location_obj->getlocation('113.96.104.123');
print_r($address);
$address = $ip_location_obj->getlocation('223.198.104.123');
print_r($address);
$address = $ip_location_obj->getlocation('182.128.104.123');
print_r($address);
$address = $ip_location_obj->getlocation('182.240.104.123');
print_r($address);
$address = $ip_location_obj->getlocation('114.138.104.123');
print_r($address);
$address = $ip_location_obj->getlocation('223.220.104.123');
print_r($address);
$address = $ip_location_obj->getlocation('42.88.104.123');
print_r($address);
$address = $ip_location_obj->getlocation('115.148.104.123');
print_r($address);
$address = $ip_location_obj->getlocation('61.57.155.236');
print_r($address);
$address = $ip_location_obj->getlocation('123.178.104.123');
print_r($address);
$address = $ip_location_obj->getlocation('124.224.104.123');
print_r($address);
$address = $ip_location_obj->getlocation('49.112.104.123');
print_r($address);
$address = $ip_location_obj->getlocation('27.98.224.123');
print_r($address);
$address = $ip_location_obj->getlocation('222.216.104.123');
print_r($address);
$address = $ip_location_obj->getlocation('58.31.104.123');
print_r($address);
$address = $ip_location_obj->getlocation('124.76.104.123');
print_r($address);
$address = $ip_location_obj->getlocation('221.196.104.123');
print_r($address);
$address = $ip_location_obj->getlocation('125.80.104.123');
print_r($address);
$address = $ip_location_obj->getlocation('202.97.96.123');
print_r($address);
$address = $ip_location_obj->getlocation('202.175.34.123');
print_r($address);
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