src/ShortCode/Reversible.php
public static function convert($input, $outputFormat = Code::FORMAT_ALNUM, $minLength = null)
    {
        if(is_int($minLength)) {
            $input += self::getMinForlength($outputFormat, $minLength);
        }

        static::throwUnlessAcceptable($outputFormat, $input);

        return self::convertBase($input, self::FORMAT_NUMBER, $outputFormat);
    }
public static function convert($input, $outputFormat = Code::FORMAT_ALNUM, $minLength = null)
    {
        if(is_int($minLength)) {
            $input += self::getMinForlength($outputFormat, $minLength);
        }

        static::throwUnlessAcceptable($outputFormat, $input);

        return self::convertBase($input, self::FORMAT_NUMBER, $outputFormat);
    }
Get a code created from a number

@param $input
@param string $outputFormat One of Code::FORMAT_* constants. Default Code::FORMAT_ALNUM
@param null $minLength

@return string