Home Backend Development PHP Tutorial 解析php根据ip查询所在地区(非常有用,赶集网就用到)_PHP

解析php根据ip查询所在地区(非常有用,赶集网就用到)_PHP

Jun 01, 2016 pm 12:05 PM
ip php area

dat文件,关于ip对应地区的信息文件
qqwry.dat文件
网上自己下载

class类文件,解析qqwry.data文件的
IpLocation.php文件
复制代码 代码如下:
class IpLocation {
    /**
    * @var resource 指针
    */
    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($filename, 'rb')) !== false) {
            $this->firstip = $this->getlong();
            $this->lastip = $this->getlong();
            $this->totalip = ($this->lastip - $this->firstip) / 7;
        }
    }
    /**
    * 返回读取的长整型数
    * @access private
    * @return int
    */
    public 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
    */
    public 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 $ip
    * @return string
    */
    public function packip($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 $data
    * @return string
    */
    public function getstring($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 mb_convert_encoding($data, 'utf-8', 'gb2312');
    }
    /**
    * 返回地区信息
    *
    * @access private
    * @return string
    */
    public 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
        $location['ip'] = gethostbyname($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             $i = floor(($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                 $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'] = $this->getarea();
                break;
        }
        if ($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;
    }

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

这个也可以网上下载,也可以copy这里的,这里的也是很全的。
执行文件,我这里叫ip_location.php文件
复制代码 代码如下:
function getIpPlace(){
 require_once("IpLocation.php")//加载类文件IpLocation.php
 $ipfile = "qqwry.dat";  //获取ip对应地区的信息文件
 $iplocation = new IpLocation($ipfile); //new IpLocation($ipfile) $ipfile ip对应地区信息文件
 $ipresult = $iplocation->getlocation("ip地址"); //根据ip地址获得地区 getlocation("ip地区")
 return $ipresult;
}
print_r($getIpPlace()); //调用方法
?>

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