正在视图| Codeigniter上打印嵌套数组

Question

我正在使用会话构建一个购物车，我将每个披萨添加到一个数组中并传递到会话。阵列如下，

[cart_items] => Array
(
[0] => Array
(
[item_id] => 3
[item_name] => New York-Style Pizza
[price] => 800.00
[toppings] => Array
(
[0] => Array
(
[id] => 1
[name] => Mozarella Cheese 
[price] => 150.00
)
[1] => Array
(
[id] => 7
[name] => Chicken Bacon 
[price] => 250.00
)
)
[toppings_price] => 0
[quantity] => 1
[price_per_item] => 800
)
)

我可以显示商品id、披萨名称、价格和数量，但无法显示用户在Toppings列中选择的浇头名称。我应该怎么做>

查看

下面的代码显示了我从数组中获取值的方式

<?php $list = $this->session->userdata('cart_items');
if($list==Null) {
print_r("There are no items in the your cart");
}else{
foreach ($list as $item=>$value){
echo "<li class='list-group-item d-flex justify-content-between lh-condensed'>";
print_r("<div>".$value['item_id']."</div>");
print_r("<div>".$value['item_name']."</div>");
print_r("<div>".$value['price']."</div>");
$toppings_names=array($value['toppings']);
foreach ($toppings_names as $name=>$val){
print_r("<div>");
print_r($val['name']);
print_r("</div>");
}
print_r("<div>".$value['quantity']."</div>");
echo "</li>";
}
}
?>

输出

我期望的输出如下

商品ID |商品名称|价格|浇头(选定浇头名称(|数量

列表没有显示"我收到错误"；未定义的索引：name"。

Answer 1

您必须在topping上进行循环，因为它也是数组，所以您可以检查其中的每个项。

<?php
$list = $this->session->userdata('cart_items');    //Array
if ($list == null) {
print_r("There are no items in the your cart");
} else {
foreach ($list as $item => $value) {
echo "<li class='list-group-item d-flex justify-content-between lh-condensed'>";
print_r("<div>".$value['item_id']."</div>");
print_r("<div>".$value['item_name']."</div>");
print_r("<div>".$value['price']."</div>");
// toppings array is empty (nothing selected)
if ($value['toppings'] == null) {
print_r("<div>There is no toppings selected</div>");
} else {
foreach ($value['toppings'] as $val) {
// here you can access indexes id, name, price in toppings array
print_r("<div>");
print_r($val['name']);
print_r("</div>");
}
}

print_r("<div>".$value['quantity']."</div>");
echo "</li>";
}
}

>

Answer 2

您可以在没有变量的情况下执行foreach

if (!empty($value['toppings'])) {
foreach ($value['toppings'] as $val) {
print_r("<div>");
print_r($val['name']);
print_r("</div>");
}
}