Question

我有一个嵌套数组，我想知道是否有一种方法可以使它滑动，所以将嵌套数组作为单独的数组

Array
(
    [0] => Array
        (
            [menu] => Array
                (
                    [pizza] => Array
                        (
                            [Tomato & Cheese] => Array
                                (
                                    [small] => 5.50
                                    [large] => 9.75
                                )

                            [Olives] => Array
                                (
                                    [small] => 6.85
                                    [large] => 10.85
                                )

                        )

                    [Speciality Pizzas] => Array
                        (
                            [Our Special] => Array
                                (
                                    [ingredients] => Array
                                        (
                                            [0] => Tomatoes
                                            [1] => Olives
                                            [2] => Spinach
                                            [3] => Fresh Garlic
                                            [4] => Mozzarella & Feta Cheese
                                        )  --- theres more but you get the idea

现在我想要一个包含所有比萨饼的新阵列，但不知道名字“披萨”

目前我可以这样做：

$array = array(json_decode($json, true));
$pizzas = (array)$array[0]['menu']['pizza']

但是如果菜单改变内容（但不是结构）并且如果'披萨'变成'沙拉'，则上述将失败。是一种创建上面没有名称

的比萨饼阵列的方法

由于

Answer 1

$array = array(json_decode($json, true));
$menu = (array)$array[0]['menu'];
foreach($menu as $item => $item_Data){
    //$item might be pizza for example
    //$item_Data might be Olives or Our special. Now you have to consider what to do with this. Maybe next foreach loop ?
}

Answer 2

现在你的数组有相关数据的并行部分。如果你做了类似的事情怎么样：

$food_choices = array(
     'pizza' => array(
         'Tomato & Cheese' => array(
               'type' => 'regular',
               'prices' => array(...),
               'ingredients' => array(...)
         ),
         'Our Special' => array(
              'type' => 'specialty',
              'prices' => array(...),
              'ingredients' => array(...)
         ),
     ),
     'salads' => array(
          'Caesar' => array(...);
          'Tossed' => array(...);
     )
)

其中所有与任何一个菜单项相关的信息都在meu树的同一分支中。然后访问任何一个披萨的信息就像：

$data = $food_choices['pizza']['Tomato & Cheese'];
echo 'The large of this pizza costs $', $data['prices']['large'];
echo 'The small Caesar salad contains ', implode($food_choices['salad']['Caesar']['ingredients);

Answer 3

一系列foreach循环可能会这样做，即使我不知道你在做什么。

<?php

    $pizza = '';

    foreach ($array as $food) {

        $pizza .= $food;

        if (is_array($food)) {

            foreach ($food as $option) {

                $pizza .= " > " . $option;

                if (is_array($option)) {

                    foreach ($option as $value) {

                        //etc
                    }
                }
            }
        }
    }

?>

Answer 4

要了解数组中的键，请使用array_keys函数（Demo）：

$array = array(array('menu' => array(/* ... */))); # your array

print_r(array_keys($array[0])); # Array(menu)

如何滑动这个多维阵列？

4 个答案: