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HomeBackend DevelopmentPHP Tutorialphp 相仿腾讯的IP库

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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