php查询IP地理位置（dat数据库)

ipdata类源码

FirstStartIp + $RecNo * 7;
        @fseek($this->fp, $offset, SEEK_SET);
        $buf = fread($this->fp, 7);
        $this->EndIpOff = ord($buf[4]) + (ord($buf[5]) * 256) + (ord($buf[6]) * 256 * 256);
        $this->StartIp = ord($buf[0]) + (ord($buf[1]) * 256) + (ord($buf[2]) * 256 * 256) + (ord($buf[3]) * 256 * 256 * 256);
        return $this->StartIp;
    }

    function getEndIp() {
        @fseek($this->fp, $this->EndIpOff, SEEK_SET);
        $buf = fread($this->fp, 5);
        $this->EndIp = ord($buf[0]) + (ord($buf[1]) * 256) + (ord($buf[2]) * 256 * 256) + (ord($buf[3]) * 256 * 256 * 256);
        $this->CountryFlag = ord($buf[4]);
        return $this->EndIp;
    }

    function getCountry() {
        switch ($this->CountryFlag) {
            case 1:
            case 2:
                $this->Country = $this->getFlagStr($this->EndIpOff + 4);
                $this->Local = (1 == $this->CountryFlag) ? '' : $this->getFlagStr($this->EndIpOff + 8);
                break;
            default:
                $this->Country = $this->getFlagStr($this->EndIpOff + 4);
                $this->Local = $this->getFlagStr(ftell($this->fp));
        }
    }

    function getFlagStr($offset) {
        $flag = 0;

        while (1) {
            @fseek($this->fp, $offset, SEEK_SET);
            $flag = ord(fgetc($this->fp));

            if ($flag == 1 || $flag == 2) {
                $buf = fread($this->fp, 3);

                if ($flag == 2) {
                    $this->CountryFlag = 2;
                    $this->EndIpOff = $offset - 4;
                }

                $offset = ord($buf[0]) + (ord($buf[1]) * 256) + (ord($buf[2]) * 256 * 256);
            } else {
                break;
            }

        }

        if ($offset < 12) {
            return '';
        }

        @fseek($this->fp, $offset, SEEK_SET);

        return $this->getStr();
    }

    function getStr() {
        $str = '';

        while (1) {
            $c = fgetc($this->fp);

            if (ord($c[0]) == 0) {
                break;
            }

            $str .= $c;
        }

        return iconv('gbk', 'utf-8', $str);
    }

    function geop($dotip = '') {
        if (!$dotip) {
            return;
        }

        if (preg_match("/^(127)/", $dotip)) {
            $this->Country = '本地网络';
            return;
        } else if (preg_match("/^(192)/", $dotip)) {
            $this->Country = '局域网';
            return;
        }

        $nRet;
        $ip = $this->IpToInt($dotip);
        $this->fp = fopen(__QQWRY__, "rb");

        if ($this->fp == NULL) {
            $szLocal = "OpenFileError";
            return 1;
        }

        @fseek($this->fp, 0, SEEK_SET);
        $buf = fread($this->fp, 8);
        $this->FirstStartIp = ord($buf[0]) + (ord($buf[1]) * 256) + (ord($buf[2]) * 256 * 256) + (ord($buf[3]) * 256 * 256 * 256);
        $this->LastStartIp = ord($buf[4]) + (ord($buf[5]) * 256) + (ord($buf[6]) * 256 * 256) + (ord($buf[7]) * 256 * 256 * 256);

        $RecordCount = floor(($this->LastStartIp - $this->FirstStartIp) / 7);

        if ($RecordCount <= 1) {
            $this->Country = "FileDataError";
            fclose($this->fp);
            return 2;
        }

        $RangB = 0;
        $RangE = $RecordCount;

        // Match ...
        while ($RangB < $RangE - 1) {
            $RecNo = floor(($RangB + $RangE) / 2);
            $this->getStartIp($RecNo);

            if ($ip == $this->StartIp) {
                $RangB = $RecNo;
                break;
            }

            if ($ip > $this->StartIp) {
                $RangB = $RecNo;
            } else {
                $RangE = $RecNo;
            }

        }

        $this->getStartIp($RangB);
        $this->getEndIp();

        if (($this->StartIp <= $ip) && ($this->EndIp >= $ip)) {
            $this->getCountry();
        } else {
            $this->Country = '未知';
            $this->Local = '';
        }

        fclose($this->fp);
    }

    function IpToInt($Ip) {
        $array = explode('.', $Ip);
        $Int = ($array[0] * 256 * 256 * 256) + ($array[1] * 256 * 256) + ($array[2] * 256) + $array[3];

        return $Int;
    }
}

使用

geop($ip);
echo $ipdata->Country.$ipdata->Local;

运行结果

运行结果