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<?php/*--------------------------------------------------ip2address [qqwry.dat]--------------------------------------------------*/class ip {var $fh; //IP資料庫檔案控制代碼var $first; //第一條索引var $last; //最後一條索引var $total; //索引總數//建構函式function __construct() {$this->fh = fopen(‘qqwry.dat‘, ‘rb‘); //qqwry.dat檔案$this->first = $this->getLong4();$this->last = $this->getLong4();$this->total = ($this->last - $this->first) / 7; //每條索引7位元組}//檢查IP合法性function checkIp($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() {//讀取little-endian編碼的4個位元組轉化為長整型數$result = unpack(‘Vlong‘, fread($this->fh, 4));return $result[‘long‘];}function getLong3() {//讀取little-endian編碼的3個位元組轉化為長整型數$result = unpack(‘Vlong‘, fread($this->fh, 3).chr(0));return $result[‘long‘];}//查詢資訊function getInfo($data = "") {$char = fread($this->fh, 1);while (ord($char) != 0) { //國家地區資訊以0結束$data .= $char;$char = fread($this->fh, 1);}return $data;}//查詢地區資訊function getArea() {$byte = fread($this->fh, 1); //標誌位元組switch (ord($byte)) {case 0: $area = ‘‘; break; //沒有地區資訊case 1: //地區被重新導向fseek($this->fh, $this->getLong3());$area = $this->getInfo(); break;case 2: //地區被重新導向fseek($this->fh, $this->getLong3());$area = $this->getInfo(); break;default: $area = $this->getInfo($byte); break; //地區沒有被重新導向}return $area;}function ip2addr($ip) {if(!$this -> checkIp($ip)){return false;}$ip = pack(‘N‘, intval(ip2long($ip)));//二分尋找$l = 0;$r = $this->total;while($l <= $r) {$m = floor(($l + $r) / 2); //計算中間索引fseek($this->fh, $this->first + $m * 7);$beginip = strrev(fread($this->fh, 4)); //中間索引的開始IP地址fseek($this->fh, $this->getLong3());$endip = strrev(fread($this->fh, 4)); //中間索引的結束IP地址if ($ip < $beginip) { //使用者的IP小於中間索引的開始IP地址時$r = $m - 1;} else {if ($ip > $endip) { //使用者的IP大於中間索引的結束IP地址時$l = $m + 1;} else { //使用者IP在中間索引的IP範圍內時$findip = $this->first + $m * 7;break;}}}//查詢國家地區資訊fseek($this->fh, $findip);$location[‘beginip‘] = long2ip($this->getLong4()); //使用者IP所在範圍的開始地址$offset = $this->getlong3();fseek($this->fh, $offset);$location[‘endip‘] = long2ip($this->getLong4()); //使用者IP所在範圍的結束位址$byte = fread($this->fh, 1); //標誌位元組switch (ord($byte)) {case 1: //國家和地區資訊都被重新導向$countryOffset = $this->getLong3(); //重新導向地址fseek($this->fh, $countryOffset);$byte = fread($this->fh, 1); //標誌位元組switch (ord($byte)) {case 2: //國家資訊被二次重新導向fseek($this->fh, $this->getLong3());$location[‘country‘] = $this->getInfo();fseek($this->fh, $countryOffset + 4);$location[‘area‘] = $this->getArea();break;default: //國家資訊沒有被二次重新導向$location[‘country‘] = $this->getInfo($byte);$location[‘area‘] = $this->getArea();break;}break;case 2: //國家資訊被重新導向fseek($this->fh, $this->getLong3());$location[‘country‘] = $this->getInfo();fseek($this->fh, $offset + 8);$location[‘area‘] = $this->getArea();break;default: //國家資訊沒有被重新導向$location[‘country‘] = $this->getInfo($byte);$location[‘area‘] = $this->getArea();break;}//gb2312 to utf-8(去除無資訊時顯示的CZ88.NET)foreach ($location as $k => $v) {$location[$k] = str_replace(‘CZ88.NET‘,‘‘,iconv(‘gb2312‘, ‘utf-8‘, $v));}return $location;}//解構函式function __destruct() {fclose($this->fh);}}$ip = new ip();$addr = $ip -> ip2addr(‘IP地址‘);print_r($addr);?>
PHP讀取純真IP地址資料庫