Simple example of php reading innocent ip database-PHP Tutorial-php.cn

Simple example of php reading innocent ip database

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Release： 2016-07-25 08:54:40

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/*----------------------------------------- ----------
ip2address [qqwry.dat]
--------------------------------- --------------------*/
class ip {
var $fh; //IP database file handle
var $first; //First index
var $last; //The last index
var $total; //Total indexes
//Constructor function
function __construct() {
$this->fh = fopen('qqwry.dat', 'rb'); / /qqwry.dat file
$this->first = $this->getLong4();
$this->last = $this->getLong4();
$this->total = ($this ->last - $this->first) / 7; //Each index is 7 bytes
}
//Check the legality of the IP
function checkIp($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() {
//Read little -Convert 4 bytes of endian encoding to long integer
$result = unpack('Vlong', fread($this->fh, 4));
return $result['long'];
}
function getLong3() {
//Read the 3 bytes of little-endian encoding and convert it into a long integer
$result = unpack('Vlong', fread($this->fh, 3).chr(0 ));
return $result['long'];
}
//Query information
function getInfo($data = "") {
$char = fread($this->fh, 1);
while ( ord($char) != 0) { //Country and region information ends with 0
$data .= $char;
$char = fread($this->fh, 1);
}
return $data;
} bbs.it-home.org
//Query area information
function getArea() {
$byte = fread($this->fh, 1); //Flag byte
switch (ord($byte)) {
case 0: $area = ''; break; //There is no area information
case 1: //The area is redirected
fseek($this->fh, $this->getLong3());
$ area = $this->getInfo(); break;
case 2: //Area is redirected
fseek($this->fh, $this->getLong3());
$area = $this- >getInfo(); break;
default: $area = $this->getInfo($byte); break; //The area is not redirected
}
return $area;
}
function ip2addr($ip) {
if(!$this -> checkIp($ip)){
return false;
}
$ip = pack('N', intval(ip2long($ip)));
//Binary search
$ l = 0;
$r = $this->total;
while($l <= $r) {
$m = floor(($l + $r) / 2); //Calculate the intermediate index
fseek($this->fh, $this->first + $m * 7);
$beginip = strrev(fread($this->fh, 4)); //The starting IP address of the intermediate index
fseek($this->fh, $this->getLong3());
$endip = strrev(fread($this->fh, 4)); //End IP address of the intermediate index
if ($ ip < $beginip) { //When the user's IP is less than the starting IP address of the intermediate index
$r = $m - 1;
} else {
if ($ip > $endip) { //The user's IP is greater than When the ending IP address of the intermediate index is
$l = $m + 1;
} else { //When the user IP is within the IP range of the intermediate index
$findip = $this->first + $m * 7;
break ;
}
}
}
//Query country and region information
fseek($this->fh, $findip);
$location['beginip'] = long2ip($this->getLong4()); / /Start address of the user IP range
$offset = $this->getlong3();
fseek($this->fh, $offset);
$location['endip'] = long2ip($this-> ;getLong4()); //End address of the user IP range
$byte = fread($this->fh, 1); //Flag byte
switch (ord($byte)) {
case 1: //Both country and region information are redirected
$countryOffset = $this->getLong3(); //Redirect address
fseek($this->fh, $countryOffset);
$byte = fread($this ->fh, 1); //Flag byte
switch (ord($byte)) {
case 2: //Country information is redirected twice
fseek($this->fh, $this-> ;getLong3());
$location['country'] = $this->getInfo();
fseek($this->fh, $countryOffset + 4);
$location['area'] = $ this->getArea();
break;
default: //Country information is not redirected twice
$location['country'] = $this->getInfo($byte);
$location['area '] = $this->getArea();
break;
}
break;
case 2: //Country information is redirected
fseek($this->fh, $this->getLong3()) ;
$location['country'] = $this->getInfo();
fseek($this->fh, $offset + 8);
$location['area'] = $this->getArea ();
break;
default: //Country information is not redirected
$location['country'] = $this->getInfo($byte);
$location['area'] = $this-> ;getArea();
break;
}
//gb2312 to utf-8 (remove CZ88.NET displayed when there is no information)
foreach ($location as $k => $v) {
$location[$k] = str_replace('CZ88.NET', '',iconv('gb2312', 'utf-8', $v));
}
return $location;
}
//Destructor
function __destruct() {
fclose($this->fh );
}
}
$ip = new ip();
$addr = $ip -> ip2addr('IP address');
print_r($addr);
?>

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