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PHP读取纯真IP地址数据库

2020-07-14 17:15:03 leiting (3167阅读)

标签 PHP

纯真IP地址数据库(官方下载)

http://www.cz88.net/fox/ipdat.shtml

<?php

/*--------------------------------------------------

        ip2address [qqwry.dat]

--------------------------------------------------*/



class ip {

        var $fh; //IP数据库文件句柄

        var $first; //第一条索引

        var $last; //最后一条索引

        var $total; //索引总数



        //构造函数

        function __construct() {

                $this->fh = fopen('qqwry.dat', 'rb'); //qqwry.dat文件

                $this->first = $this->getLong4();

                $this->last = $this->getLong4();

                $this->total = ($this->last - $this->first) / 7; //每条索引7字节

        }



        //检查IP合法性

        function checkIp($ip) {

                $arr = explode('.',$ip);

                if(count($arr) !=4 ) {

                        return false;

                } else {

                        for ($i=0; $i < 4; $i++) {

                                if ($arr[$i] <'0' || $arr[$i] > '255') {

                                        return false;

                                }

                        }

                }

                return true;

        }



        function getLong4() {

                //读取little-endian编码的4个字节转化为长整型数

                $result = unpack('Vlong', fread($this->fh, 4));

                return $result['long'];

        }



        function getLong3() {

                //读取little-endian编码的3个字节转化为长整型数

                $result = unpack('Vlong', fread($this->fh, 3).chr(0));

                return $result['long'];

        }



        //查询信息

        function getInfo($data = "") {

                $char = fread($this->fh, 1);

                while (ord($char) != 0) { //国家地区信息以0结束

                        $data .= $char;

                        $char = fread($this->fh, 1);

                }

                return $data;

        }



        //查询地区信息

        function getArea() {

                $byte = fread($this->fh, 1); //标志字节

                switch (ord($byte)) {

                        case 0: $area = ''; break; //没有地区信息

                        case 1: //地区被重定向

                                fseek($this->fh, $this->getLong3());

                                $area = $this->getInfo(); break;

                        case 2: //地区被重定向

                        fseek($this->fh, $this->getLong3());

                        $area = $this->getInfo(); break;

                        default: $area = $this->getInfo($byte);  break; //地区没有被重定向

                }

                return $area;

        }



        function ip2addr($ip) {

                if(!$this -> checkIp($ip)){

                        return false;

                }



                $ip = pack('N', intval(ip2long($ip)));



                //二分查找

                $l = 0;

                $r = $this->total;



                while($l <= $r) {

                        $m = floor(($l + $r) / 2); //计算中间索引

                        fseek($this->fh, $this->first + $m * 7);

                        $beginip = strrev(fread($this->fh, 4)); //中间索引的开始IP地址

                        fseek($this->fh, $this->getLong3());

                        $endip = strrev(fread($this->fh, 4)); //中间索引的结束IP地址



                        if ($ip < $beginip) { //用户的IP小于中间索引的开始IP地址时

                                $r = $m - 1;

                        } else {

                                if ($ip > $endip) { //用户的IP大于中间索引的结束IP地址时

                                        $l = $m + 1;

                                } else { //用户IP在中间索引的IP范围内时

                                        $findip = $this->first + $m * 7;

                                        break;

                                }

                        }

                }



                //查询国家地区信息

                fseek($this->fh, $findip);

                $location['beginip'] = long2ip($this->getLong4()); //用户IP所在范围的开始地址

                $offset = $this->getlong3();

                fseek($this->fh, $offset);

                $location['endip'] = long2ip($this->getLong4()); //用户IP所在范围的结束地址

                $byte = fread($this->fh, 1); //标志字节

                switch (ord($byte)) {

                        case 1:  //国家和区域信息都被重定向

                                $countryOffset = $this->getLong3(); //重定向地址

                                fseek($this->fh, $countryOffset);

                                $byte = fread($this->fh, 1); //标志字节

                                switch (ord($byte)) {

                                        case 2: //国家信息被二次重定向

                                                fseek($this->fh, $this->getLong3());

                                                $location['country'] = $this->getInfo();

                                                fseek($this->fh, $countryOffset + 4);

                                                $location['area'] = $this->getArea();

                                                break;

                                        default: //国家信息没有被二次重定向

                                                $location['country'] = $this->getInfo($byte);

                                                $location['area'] = $this->getArea();

                                                break;

                                }

                                break;



                        case 2: //国家信息被重定向

                                fseek($this->fh, $this->getLong3());

                                $location['country'] = $this->getInfo();

                                fseek($this->fh, $offset + 8);

                                $location['area'] = $this->getArea();

                                break;



                        default: //国家信息没有被重定向

                                $location['country'] = $this->getInfo($byte);

                                $location['area'] = $this->getArea();

                                break;

                }



                //gb2312 to utf-8(去除无信息时显示的CZ88.NET)

                foreach ($location as $k => $v) {

                        $location[$k] = str_replace('CZ88.NET','',iconv('gb2312', 'utf-8', $v));

                }



                return $location;

        }



        //析构函数

        function __destruct() {

                fclose($this->fh);

        }

}



$ip = new ip();

$addr = $ip -> ip2addr('IP地址');

print_r($addr);

?>


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