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- <?php
- /**
- * 纯真 IP 数据库查询
- *
- * 参考资料:
- * - 纯真 IP 数据库 http://www.cz88.net/ip/
- * 使用示例:
- * $ip = new IPQuery();
- * $addr = $ip->query('IP地址');
- * print_r($addr);
- */
- class IPQuery {
- private $fh; // IP数据库文件句柄
- private $first; // 第一条索引
- private $last; // 最后一条索引
- private $total; // 索引总数
- private $dbFile = __DIR__ . DIRECTORY_SEPARATOR . 'qqwry.dat'; // 纯真 IP 数据库文件存放路径
- private $dbExpires = 86400 * 10; // 数据库文件有效期(10天)如无需自动更新 IP 数据库,请将此值改为 0
- // 构造函数
- function __construct() {
- // IP 数据库文件不存在或已过期,则自动获取
- if (!file_exists($this->dbFile) || ($this->dbExpires && ((time() - filemtime($this->dbFile)) > $this->dbExpires))) {
- $this->update();
- }
- }
- // 忽略超时
- private function ignore_timeout() {
- @ignore_user_abort(true);
- @ini_set('max_execution_time', 48 * 60 * 60);
- @set_time_limit(48 * 60 * 60); // set_time_limit(0) 2day
- @ini_set('memory_limit', '4000M'); // 4G;
- }
- // 读取little-endian编码的4个字节转化为长整型数
- private function getLong4() {
- $result = unpack('Vlong', fread($this->fh, 4));
- return $result['long'];
- }
- // 读取little-endian编码的3个字节转化为长整型数
- private function getLong3() {
- $result = unpack('Vlong', fread($this->fh, 3) . chr(0));
- return $result['long'];
- }
- // 查询位置信息
- private function getPos($data = '') {
- $char = fread($this->fh, 1);
- while (ord($char) != 0) { // 地区信息以 0 结束
- $data .= $char;
- $char = fread($this->fh, 1);
- }
- return $data;
- }
- // 查询运营商
- private function getISP() {
- $byte = fread($this->fh, 1); // 标志字节
- switch (ord($byte)) {
- case 0: $area = '';
- break; // 没有相关信息
- case 1: // 被重定向
- fseek($this->fh, $this->getLong3());
- $area = $this->getPos();
- break;
- case 2: // 被重定向
- fseek($this->fh, $this->getLong3());
- $area = $this->getPos();
- break;
- default: $area = $this->getPos($byte);
- break; // 没有被重定向
- }
- return $area;
- }
- // 检查 IP 格式是否正确
- public function checkIp($ip) {
- $arr = explode('.', $ip);
- if (count($arr) != 4)
- return false;
- for ($i = 0; $i < 4; $i++) {
- if ($arr[$i] < '0' || $arr[$i] > '255') {
- return false;
- }
- }
- return true;
- }
- // 查询 IP 地址
- public function query($ip) {
- if (!$this->checkIp($ip)) {
- return false;
- }
- $this->fh = fopen($this->dbFile, 'rb');
- $this->first = $this->getLong4();
- $this->last = $this->getLong4();
- $this->total = ($this->last - $this->first) / 7; // 每条索引7字节
- $ip = pack('N', intval(ip2long($ip)));
- // 二分查找 IP 位置
- $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 + $m * 7;
- break;
- }
- }
- }
- // 查找 IP 地址段
- fseek($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
- // 查找 IP 信息
- $byte = fread($this->fh, 1); // 标志字节
- switch (ord($byte)) {
- case 1: // 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($byte)) {
- case 2: // 信息被二次重定向
- fseek($this->fh, $this->getLong3());
- $location['pos'] = $this->getPos();
- fseek($this->fh, $countryOffset + 4);
- $location['isp'] = $this->getISP();
- break;
- default: // 信息没有被二次重定向
- $location['pos'] = $this->getPos($byte);
- $location['isp'] = $this->getISP();
- break;
- }
- break;
- case 2: // 信息被重定向
- fseek($this->fh, $this->getLong3());
- $location['pos'] = $this->getPos();
- fseek($this->fh, $offset + 8);
- $location['isp'] = $this->getISP();
- break;
- default: // 信息没有被重定向
- $location['pos'] = $this->getPos($byte);
- $location['isp'] = $this->getISP();
- break;
- }
- // 信息转码处理
- foreach ($location as $k => $v) {
- $location[$k] = iconv('gb2312', 'utf-8', $v);
- $location[$k] = preg_replace(array('/^.*CZ88\.NET.*$/isU', '/^.*纯真.*$/isU', '/^.*日IP数据/'), '', $location[$k]);
- $location[$k] = htmlspecialchars($location[$k]);
- }
- return $location;
- }
- // 更新数据库 https://www.22vd.com/40035.html
- public function update() {
- $this->ignore_timeout();
- $copywrite = file_get_contents('http://update.cz88.net/ip/copywrite.rar');
- $qqwry = file_get_contents('http://update.cz88.net/ip/qqwry.rar');
- $key = unpack('V6', $copywrite)[6];
- for ($i = 0; $i < 0x200; $i++) {
- $key *= 0x805;
- $key++;
- $key = $key & 0xFF;
- $qqwry[$i] = chr(ord($qqwry[$i]) ^ $key);
- }
- $qqwry = gzuncompress($qqwry);
- file_put_contents($this->dbFile, $qqwry);
- }
- // 析构函数
- function __destruct() {
- if ($this->fh) {
- fclose($this->fh);
- }
- $this->fp = null;
- }
- }
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