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php 相仿腾讯的IP库

WBOY
Release: 2016-06-13 13:15:47
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php 类似腾讯的IP库
$IpLocation = new IpLocation('ipData/QQWry.Dat'); 
$ipInfo=$IpLocation->getlocation($ip);
print_r($ipInfo);
注意获取的数据编码为 gbk


class IpLocation 
{
	/**
	 * QQWry.Dat文件指针
	 * @var resource
	 */
	var $fp;
	
	/**
	 * 第一条IP记录的偏移地址
	 * @var int
	 */
	var $firstip;
	
	/**
	 * 最后一条IP记录的偏移地址
	 * @var int
	 */
	var $lastip;
	
	/**
	 * IP记录的总条数(不包含版本信息记录)
	 * @var int
	 */
	var $totalip;
    
	/**
	 * 返回读取的长整型数
	 * @access private
	 * @return int
	 */
	function getlong() 
	{
		$result = unpack('Vlong', fread($this->fp, 4));	//将读取的little-endian编码的4个字节转化为长整型数
		return $result['long'];
	}
    
	/**
	* 返回读取的3个字节的长整型数
	* @access private
	* @return int
	*/
	function getlong3() 
	{
		$result = unpack('Vlong', fread($this->fp, 3).chr(0));	//将读取的little-endian编码的3个字节转化为长整型数
		return $result['long'];
	}
    
	/**
	* 返回压缩后可进行比较的IP地址
	* @access private
	* @param string $ip
	* @return string
	*/
	function packip($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)));			//intaval 获取变量的整数值
	}
    
	/**
	* 返回读取的字符串
	* @access private
	* @param string $data
	* @return string
	*/
	function getstring($data = "") 
	{
		$char = fread($this->fp, 1);
		while (ord($char) > 0)					// 字符串按照C格式保存,以\0结束 ord()得到字符的ASCII码
		{
			$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
	*/
	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 $ip
	* @return array
	*/
	function getlocation($ip = '') 
	{
		if (!$this->fp) return null;				// 如果数据文件没有被正确打开,则直接返回空
		if($ip == '') $ip = $this->clientIp();
		$location['ip'] = gethostbyname($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
		
		$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 fp, $this->firstip + $i * 7);
			$beginip = strrev(fread($this->fp, 4));        // 获取中间记录的开始IP地址
			
			if ($ip 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 ($location['country'] == " CZ88.NET")		// CZ88.NET表示没有有效信息
		{
			$location['country'] = "未知";
		}
		if ($location['area'] == " CZ88.NET") 
		{
			$location['area'] = "";
		}
		return $location;
	}
	
	/**
	 * 获取客户端IP地址
	 * */
	function clientIp(){
		if(getenv('HTTP_CLIENT_IP') && strcasecmp(getenv('HTTP_CLIENT_IP'), 'unknown')) {
			$onlineip = getenv('HTTP_CLIENT_IP');
		} elseif(getenv('HTTP_X_FORWARDED_FOR') && strcasecmp(getenv('HTTP_X_FORWARDED_FOR'), 'unknown')) {
			$onlineip = getenv('HTTP_X_FORWARDED_FOR');
		} elseif(getenv('REMOTE_ADDR') && strcasecmp(getenv('REMOTE_ADDR'), 'unknown')) {
			$onlineip = getenv('REMOTE_ADDR');
		} elseif(isset($_SERVER['REMOTE_ADDR']) && $_SERVER['REMOTE_ADDR'] && strcasecmp($_SERVER['REMOTE_ADDR'], 'unknown')) {
			$onlineip = $_SERVER['REMOTE_ADDR'];
		}
		preg_match("/[\d\.]{7,15}/", $onlineip, $onlineipmatches);
		$onlineip = $onlineipmatches[0] ? $onlineipmatches[0] : 'unknown';
		unset($onlineipmatches);
		return $onlineip;
	}
    
	/**
	 * 构造函数,打开 QQWry.Dat 文件并初始化类中的信息
	 * @param string $filename
	 * @return IpLocation
	 */
	function IpLocation($filename = "") 
	{
		if(!$filename) $filename = dirname(__FILE__) . '/QQWry.Dat';
		if(!file_exists($filename)) exit('qqwry.dat is not exists!');
		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, '_IpLocation'));
		}
	}
    
	/**
	* 析构函数,用于在页面执行结束后自动关闭打开的文件。
	*/
	function _IpLocation() 
	{
		fclose($this->fp);
	}
}

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