我正在用PHP制作一个21点游戏。所以我制作了一个包含所有卡片名称和值的Assactive数组。看起来是这样的：
$cards = array("Schoppen 2"=>"2", "Schoppen 3"=>"3", "Schoppen 4"=>"4", "Schoppen 5"=>"5", "Schoppen 6"=>"6", "Schoppen 7"=>"7", "Schoppen 8"=>"8", "Schoppen 9"=>"9", "Schoppen 10"=>"10"
, "Schoppen boer"=>"10", "Schoppen vrouw"=>"10", "Schoppen heer"=>"10", "Schoppen aas"=>"11", "Harten 2"=>"2", "Harten 3"=>"3", "Harten 4"=>"4", "Harten 5"=>"5", "Harten 6"=>"6", "Harten 7"=>"7", "Harten 8"=>"8", "Harten 9"=>"9", "Harten 10"=>"10"
, "Harten boer"=>"10", "Harten vrouw"=>"10", "Harten heer"=>"10", "Harten aas"=>"11", "Klaveren 2"=>"2", "Klaveren 3"=>"3", "Klaveren 4"=>"4", "Klaveren 5"=>"5", "Klaveren 6"=>"6", "Klaveren 7"=>"7", "Klaveren 8"=>"8", "Klaveren 9"=>"9", "Klaveren 10"=>"10"
, "Klaveren boer"=>"10", "Klaveren vrouw"=>"10", "Klaveren heer"=>"10", "Klaveren aas"=>"11", "Ruiten 2"=>"2", "Ruiten 3"=>"3", "Ruiten 4"=>"4", "Ruiten 5"=>"5", "Ruiten 6"=>"6", "Ruiten 7"=>"7", "Ruiten 8"=>"8", "Ruiten 9"=>"9", "Ruiten 10"=>"10"
, "Ruiten boer"=>"10", "Ruiten vrouw"=>"10", "Ruiten heer"=>"10", "Ruiten aas"=>"11");
现在我想为玩家挑选2张牌，为经销商挑选2张卡，所以我使用这个：
$playercards = array_rand($cards, 2);$dealercards = array_rand($cards, 2);
但现在如果我回显$playercards，它是空的。有人看到问题了吗？因为我以前没有和array_rand一起工作过。
此外，卡片可能不相同。所以，一旦一个被选中，他就不能再被array_rand选中了，有机会解决这个问题吗？
谢谢！
既然你在打牌，为什么不使用shuffle功能呢？
shuffle( $cards );
$card_player_1 = array_shift( $cards );
$card_player_2 = array_shift( $cards );
$card_dealer_1 = array_shift( $cards );
$card_dealer_2 = array_shift( $cards );
由于array_shift ，这些卡将退出阵列
更新
如果你想保留密钥，文档中有一篇文章解释了如何实现：
在保留密钥的同时打乱关联和非关联阵列，值对。也返回搅乱的数组，而不是搅乱它在正确的位置
function shuffle_assoc($list) {
if (!is_array($list)) return $list;
$keys = array_keys($list);
shuffle($keys);
$random = array();
foreach ($keys as $key) {
$random[$key] = $list[$key];
}
return $random;
}
然后你的代码：
$cards_shuffled = shuffle_assoc( $cards );
$card_player_1 = array_shift( $cards_shuffled);
$card_player_2 = array_shift( $cards_shuffled );
$card_dealer_1 = array_shift( $cards_shuffled );
$card_dealer_2 = array_shift( $cards_shuffled );
如果您想将密钥和值存储在不同的变量中，可以使用以下方法：
$cards_shuffled = shuffle_assoc($cards);
list($card_player_1_key, $card_player_1_value) = each($cards_shuffled);
array_shift($cards_shuffled);
list($card_player_2_key, $card_player_2_value) = each($cards_shuffled);
array_shift($cards_shuffled);
list($card_dealer_1_key, $card_dealer_1_value) = each($cards_shuffled);
array_shift($cards_shuffled);
list($card_dealer_2_key, $card_dealer_2_value) = each($cards_shuffled);
array_shift($cards_shuffled);
echo $card_player_1_key;// Print key of player 1 card.
echo $card_player_1_value;// Print value of player 1 card.
echo $card_dealer_2_key;// Print key of dealer second card.