*/ public static function build(): array { $cards = []; foreach (Card::SUITS as $suit) { for ($r = 3; $r <= 15; $r++) { $cards[] = new Card($r, $suit); } } $cards[] = Card::smallJoker(); $cards[] = Card::bigJoker(); return $cards; } /** * 洗牌发牌。 * * @return array{hands: array>, bottom: list} */ public static function deal(): array { $cards = self::build(); \shuffle($cards); $hands = [[], [], []]; for ($i = 0; $i < 51; $i++) { $hands[$i % 3][] = $cards[$i]; } $bottom = \array_slice($cards, 51, 3); foreach ($hands as $i => $hand) { self::sort($hands[$i]); } return ['hands' => $hands, 'bottom' => $bottom]; } /** * 按牌力升序排序（同点花色保持稳定）。 * * @param list $hand */ public static function sort(array &$hand): void { \usort($hand, static fn (Card $a, Card $b): int => $a->rank <=> $b->rank); } }