*
* static String parseIP(String $numeric)
* parses an IP Address in numeric format
+ *
+ * static String numericFromIP(String $ip)
+ * builds a numeric representing the IP
*/
class Numerics {
private static $base64charsLength = 64;
public static function intToNum($int, $length) {
- //fix a small "bug": normaly 0 = AAAAA but we need 1 = AAAAA
- $int = $int - 1;
-
$numeric = "";
for($pos = $length-1; $pos >= 0; $pos--) {
//current position represents floor($int / ($base64charsLength ^ $pos))
$base = $base * self::$base64charsLength;
}
$posValue = floor($int / $base);
+ $int -= $posValue * $base;
//get the char representing $posValue
$posChar = self::$base64chars[$posValue];
$numeric .= $posChar;
$int = ($posValue * $base);
$base = $base * self::$base64charsLength;
}
-
- //fix a small "bug": normaly 0 = AAAAA but we need 1 = AAAAA
- $int = $int + 1;
-
return $int;
}
- public static function parseIP($numeric) {
- if(strlen($numeric) == 6) { //IPv4
- $value = self::numToInt($numeric);
- $ip = array();
- $ip[0] = ($value & 0xff000000) >> 24;
- $ip[1] = ($value & 0x00ff0000) >> 16;
- $ip[2] = ($value & 0x0000ff00) >> 8;
- $ip[3] = ($value & 0x000000ff);
- return implode(".", $ip);
- } else { //IPv6
- $ip = array();
- for($i = 0; $i < strlen($numeric);) {
- if($numeric[$i] == "_") {
- $rightBlocks = (strlen($numeric) - ($i + 1)) / 3;
- $skipCount = 8 - count($ip) - $rightBlocks;
- for($j = 0; $j < $skipBlocks; $j++) {
- $ip[] = "0";
- }
- } else {
- $value = self::numToInt($numeric[$i].$numeric[$i+1].$numeric[$i+2]);
- $ip[] = dechex($value);
- $i += 3;
- }
- }
- return implode(":", $ip);
- }
- }
-
}
?>
\ No newline at end of file