php - 多次元連想配列にアクセスできません

Question

次のコードがあります。

foreach ($cardSuits as $cardSuit) {
    $keyCardValues = array_keys($cardValues);
    foreach ($keyCardValues as $cardValue) {
        $deck[] = array( "cardValue" => $cardValue, "cardSuit" => $cardSuit);
        shuffle($deck);
    }
}

if ($deal == "Deal") {
shuffle($deck);
$cards1 = array_shift($deck);
$_SESSION['value'][] = $cards1;

私はもう試した：

echo "<br />" . $_SESSION['value']['cardValue'];

しかし、それは私に未定義のインデックスエラーを与えています。ただし、print_r を実行すると正常に動作します。セッションが配列内の $cardValue を取得できるようにエコーするにはどうすればよいですか?

ありがとう

print_r の編集:

Array ( [value] => Array ( [0] => Array ( [cardValue] => nine [cardSuit] => hearts ) ) [cards] => Array ( [0] => 9 [1] => 2 [2] => 10 [3] => 4 [4] => 3 [5] => 10 [6] => 5 [7] => 2 [8] => 10 [9] => 5 ) ) 

エコーprint_rの編集：

Array ( [value] => Array ( [0] => Array ( [cardValue] => nine [cardSuit] => diamonds ) ) [cards] => Array ( [0] => 9 [1] => 3 [2] => 7 [3] => 10 [4] => 9 [5] => 11 [6] => 7 [7] => 10 [8] => 10 [9] => 5 ) )