如何訪問存儲在會話數組中的信息？

Question

鑑於以下代碼：

session_start(); 

$cart = $_SESSION['cart']; 

print_r($_SESSION['cart']); 

然後我可以看到我想要訪問的內容：

陣列（[153c740f526f2fa8aac9e1ddfdce2716] =>數組（[DEAL_ID] => 38 [variation_id] => [變化] => [數量] => 6 [數據] => ......

還有更多，但就是基礎...

我希望能夠做的是獲取和設置數量：

所以我已經試過：

$cart = $_SESSION['cart']; 

for ($i = 0 ; $i < count($cart) ; $i ++) 
{ 
    echo "The session variable you want" . $_SESSION['cart'][$i]['deal_id']; 
    echo "<br>"; 

} 

但是沒有輸出，我究竟做錯了什麼？

Answer 1

foreach ($_SESSION['cart'] as $k => $data) { 
    echo "The session variable you want" . $data['deal_id']; 
    $_SESSION['cart'][$k]['deal_id'] = 'new id'; 
} 

Answer 2

根據您剛剛打印的數據，「購物車」內，該陣列是關聯的，而不是數值。

要通過關聯數組遍歷，使用foreach與$someArray as $key => $val表達

Answer 3

的車沒有被序貫索引收錄，你不能循環這樣的說法，你需要使用foreach循環：

foreach($_SESSION['cart'] as $index => $value) 
    echo "Var = " . $value['deal_id']; 

如果你想設置的值，通過循環參考值

foreach($_SESSION['cart'] as $index => &$value) 
{ 
    echo "Var = " . $value['deal_id']; 
    $value['deal_id'] = 'newValue'; 
} 

Answer 4

您使用foreach語句

foreach($cart as $key=>$value){ 
    echo "The session variable you want" . $value['deal_id']; 
    echo "<br>"; 
} 

Answer 5

您將使用foreach環簡化事情

foreach ($_SESSION['cart'] as $k => $data) { 
    echo "The session variable you want" . $data['deal_id']; 
    echo "<br>"; 
    $_SESSION['cart'][$k] = "new Value"; 
} 

Answer 6

使用foreach遍歷$_SESSION數組遍歷：

foreach($cart as $k=> $value){ 

echo "The session variable you want" . $data['deal_id']. "<br>"; 
$_SESSION['cart'][$k] = "newValueGoesHere"; //setting the new value 

}