<?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;
}
}
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