Question

给出以下代码：

session_start();

$cart = $_SESSION['cart'];

print_r($_SESSION['cart']);

然后我可以看到我想要访问的内容：

数组（[153c740f526f2fa8aac9e1ddfdce2716] =＆gt;数组（[deal_id] =＆gt; 38 [variation_id] =＆gt; [variation] =＆gt; [数量] =＆gt; 6 [数据] =＆gt; .....

还有更多，但这是基础......

我想要做的是获取并设置数量：

所以我试过了：

$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

根据你刚刚打印的数据，在'cart'中，数组是关联的，而不是数字。

要遍历关联数组，请将foreach与$someArray as $key => $val表达式

一起使用

Answer 3

购物车没有按顺序索引编制索引，你不能以这种方式循环，你需要使用foreach循环：

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

如果要设置值，请按引用循环值

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

Answer 4

你使用foreach声明

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

Answer 5

您将使用foreach循环

简化操作

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循环遍历$_SESSION数组：

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

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

}

如何访问存储在会话数组中的信息？

6 个答案: