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| <?php | |
| /** | |
| * BaseConverter. | |
| * | |
| * @author Frank Nägler <mail@naegler.net> | |
| * | |
| * @link https://github.com/NeoBlack/BaseConverter | |
| */ | |
| namespace NeoBlack\BaseConverter; | |
| /** | |
| * Class BaseConverter | |
| * | |
| * @package NeoBlack\BaseConverter | |
| */ | |
| class BaseConverter | |
| { | |
| /** | |
| * Base64 nach RFC 4648 | |
| * @var string | |
| */ | |
| const BASE64 = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ-_'; | |
| /** | |
| * @var string | |
| */ | |
| const BASE62 = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'; | |
| /** | |
| * Base32 nach RFC 4648 | |
| * @var string | |
| */ | |
| const BASE32 = '0123456789ABCDEFGHIJKLMNOPQRSTUV'; | |
| /** | |
| * Base16 nach RFC 4648 | |
| * @var string | |
| */ | |
| const BASE16 = '0123456789ABCDEF'; | |
| /** | |
| * Convert from any base to base 10 . | |
| * | |
| * @param string $value | |
| * @param string $base | |
| * | |
| * @return int | |
| */ | |
| public static function to10Base(string $value, string $base = self::BASE64): int | |
| { | |
| $baseLength = strlen($base); | |
| $valueLength = strlen($value); | |
| $result = strpos($base, $value[0]); | |
| for ($i = 1; $i < $valueLength; $i++) { | |
| $result = $baseLength * $result + strpos($base, $value[$i]); | |
| } | |
| return $result; | |
| } | |
| /** | |
| * Convert from base 10 to another base. | |
| * | |
| * @param int $value | |
| * @param string $base default static::BASE64 | |
| * | |
| * @return string | |
| */ | |
| public static function toBase(int $value, string $base = self::BASE64): string | |
| { | |
| $baseLength = strlen($base); | |
| $radix = $value % $baseLength; | |
| $result = $base[$radix]; | |
| $tmp = floor($value / $baseLength); | |
| while ($tmp) { | |
| $radix = $tmp % $baseLength; | |
| $tmp = floor($tmp / $baseLength); | |
| $result = $base[$radix] . $result; | |
| } | |
| return $result; | |
| } | |
| } |