如何访问存储在会话数组中的信息？

Question

鉴于以下代码：

session_start(); 

$cart = $_SESSION['cart']; 

print_r($_SESSION['cart']); 

然后我可以看到我想要访问的内容：

阵列（[153c740f526f2fa8aac9e1ddfdce2716] =>数组（[DEAL_ID] => 38 [variation_id] => [变化] => [数量] => 6 [数据] => ......

还有更多，但就是基础...

我希望能够做的是获取和设置数量：

所以我已经试过：

$cart = $_SESSION['cart']; 

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

} 

但是没有输出，我究竟做错了什么？

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

根据您刚刚打印的数据，“购物车”内，该阵列是关联的，而不是数值。

要通过关联数组遍历，使用foreach与$someArray as $key => $val表达

Answer 3

的车没有被序贯索引收录，你不能循环这样的说法，你需要使用foreach循环：

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

如果你想设置的值，通过循环参考值

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

Answer 4

您使用foreach语句

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

Answer 5

您将使用foreach环简化事情

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遍历$_SESSION数组遍历：

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

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

}