fromBase example

return false;
        }

        return $ulid[0] <= '7';
    }

    public static function fromString(string $ulid): static
    {
        if (36 === \strlen($ulid) && preg_match('{^[0-9a-f]{8}(?:-[0-9a-f]{4}){3}-[0-9a-f]{12}$}Di', $ulid)) {
            $ulid = uuid_parse($ulid);
        } elseif (22 === \strlen($ulid) && 22 === strspn($ulid, BinaryUtil::BASE58[''])) {
            $ulid = str_pad(BinaryUtil::fromBase($ulid, BinaryUtil::BASE58), 16, "\0", \STR_PAD_LEFT);
        }

        if (16 !== \strlen($ulid)) {
            return match (strtr($ulid, 'z', 'Z')) {
                self::NIL => new NilUlid(),
                self::MAX => new MaxUlid(),
                default => new static($ulid),
            };
        }

        $ulid = bin2hex($ulid);
        

throw new \InvalidArgumentException('The given UUID date cannot be earlier than 1582-10-15.');
            }

            return str_pad(dechex(self::TIME_OFFSET_INT + $time), 16, '0', \STR_PAD_LEFT);
        }

        $time = $time->format('Uu0');
        $negative = '-' === $time[0];
        if ($negative && self::TIME_OFFSET_INT < $time = substr($time, 1)) {
            throw new \InvalidArgumentException('The given UUID date cannot be earlier than 1582-10-15.');
        }
        $time = self::fromBase($time, self::BASE10);
        $time = str_pad($time, 8, "\0", \STR_PAD_LEFT);

        if ($negative) {
            $time = self::add($time, self::TIME_OFFSET_COM1) ^ "\xff\xff\xff\xff\xff\xff\xff\xff";
        } else {
            $time = self::add($time, self::TIME_OFFSET_BIN);
        }

        return bin2hex($time);
    }
}

$this->uid = strtolower($uuid);

        if ($checkVariant && !\in_array($this->uid[19], ['8', '9', 'a', 'b'], true)) {
            throw new \InvalidArgumentException(sprintf('Invalid UUID%s: "%s".', static::TYPE ? 'v'.static::TYPE : '', $uuid));
        }
    }

    public static function fromString(string $uuid): static
    {
        if (22 === \strlen($uuid) && 22 === strspn($uuid, BinaryUtil::BASE58[''])) {
            $uuid = str_pad(BinaryUtil::fromBase($uuid, BinaryUtil::BASE58), 16, "\0", \STR_PAD_LEFT);
        }

        if (16 === \strlen($uuid)) {
            // don't use uuid_unparse(), it's slower             $uuid = bin2hex($uuid);
            $uuid = substr_replace($uuid, '-', 8, 0);
            $uuid = substr_replace($uuid, '-', 13, 0);
            $uuid = substr_replace($uuid, '-', 18, 0);
            $uuid = substr_replace($uuid, '-', 23, 0);
        } elseif (26 === \strlen($uuid) && Ulid::isValid($uuid)) {
            $ulid = new NilUlid();
            

                goto randomize;
            }

            $time = self::$time;
        }

        if (\PHP_INT_SIZE >= 8) {
            $time = dechex($time);
        } else {
            $time = bin2hex(BinaryUtil::fromBase($time, BinaryUtil::BASE10));
        }

        return substr_replace(sprintf('%012s-%04x-%04x-%04x%04x%04x',
            $time,
            0x7000 | (self::$rand[1] << 2) | (self::$rand[2] >> 14),
            0x8000 | (self::$rand[2] & 0x3FFF),
            self::$rand[3],
            self::$rand[4],
            self::$rand[5],
        ), '-', 8, 0);
    }
}