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我正在尝试使用 PHP 解析 JSON，但我遇到了麻烦，因为我的数组是多维的，而且我不一定知道我要查找的所有内容的名称。我想要做的是获取 JSON 文件中每个项目的 ID。我在这里查看过，但我发现的解决方案仅适用于密钥的一个实例，或者要求您知道密钥的值。为了向您展示我想要的示例，这是我的 JSON。

{
   "products_and_categories":{
      "new":[
         {
            "category_name":"Jacket",
            "name":"Half Zip Windbreaker",
            "position":3,
            "sale_price":0,
            "image_url":"0/65030/Half_Zip_Windbreaker_Green_1365029293_cart_1365029294.jpg",
            "price":14800,
            "new_item":true,
            "detail_view_url":null,
            "id":1950
         },
         {
            "category_name":"Jacket",
            "name":"The North Face\u00ae/Supreme\u003Cbr\u003EReflective 3M\u00ae Mountain Parka",
            "position":0,
            "sale_price":0,
            "image_url":"0/65059/The_North_Face--r----s--Supreme_br_Reflective_3M--r--_Mountain_Parka_Red_1365029303_cart_1365029305.jpg",
            "price":49800,
            "new_item":true,
            "detail_view_url":null,
            "id":1951
         },
         {
            "category_name":"Hats",
            "name":"Rubber Logo Camp Cap",
            "position":29,
            "sale_price":0,
            "image_url":"0/64915/Rubber_Logo_Camp_Cap_Navy_1365029249_cart_1365029251.jpg",
            "price":4800,
            "new_item":true,
            "detail_view_url":null,
            "id":1947
         }
      ],
      "Hats":[
         {
            "category_name":"Hats",
            "name":"Rubber Logo Camp Cap",
            "position":29,
            "sale_price":0,
            "image_url":"0/64915/Rubber_Logo_Camp_Cap_Navy_1365029249_cart_1365029251.jpg",
            "price":4800,
            "new_item":true,
            "detail_view_url":null,
            "id":1947
         },
         {
            "category_name":"Hats",
            "name":"Enamel S 5-Panel",
            "position":34,
            "sale_price":0,
            "image_url":"0/63614/Enamel_S_5-Panel_Green_1362616033_cart_1362616034.jpg",
            "price":5400,
            "new_item":false,
            "detail_view_url":null,
            "id":1904
         },
         {
            "category_name":"Hats",
            "name":"Big Striped Beanie",
            "position":35,
            "sale_price":0,
            "image_url":"0/61745/Big_Striped_Beanie_Green_1362023179_cart_1362023181.jpg",
            "price":3200,
            "new_item":false,
            "detail_view_url":null,
            "id":1853
         }
      ],
      "Decks":[
         {
            "category_name":"Decks",
            "name":"Power, Corruption, Lies Cruiser",
            "position":46,
            "sale_price":0,
            "image_url":"0/62026/Power__Corruption__Lies_Cruiser_Black_1362023285_cart_1362023286.jpg",
            "price":6000,
            "new_item":false,
            "detail_view_url":null,
            "id":1861
         },
         {
            "category_name":"Decks",
            "name":"Bling Logo Deck",
            "position":47,
            "sale_price":0,
            "image_url":"0/62018/Bling_Logo_Deck_Platinum_1362023282_cart_1362023283.jpg",
            "price":4900,
            "new_item":false,
            "detail_view_url":null,
            "id":1860
         }
      ],
      "Sweatshirts":[
         {
            "category_name":"Sweatshirts",
            "name":"Heathered Crewneck",
            "position":11,
            "sale_price":0,
            "image_url":"0/63855/Heathered_Crewneck_Heather_Pink_1362616124_cart_1362616125.jpg",
            "price":11800,
            "new_item":false,
            "detail_view_url":null,
            "id":1914
         },
         {
            "category_name":"Sweatshirts",
            "name":"Checkered Pullover",
            "position":12,
            "sale_price":0,
            "image_url":"0/63826/Checkered_Pullover_Yellow_1362616113_cart_1362616114.jpg",
            "price":14800,
            "new_item":false,
            "detail_view_url":null,
            "id":1913
         }
      ]
   },
   "unique_detail_view_url_prefixes":[

   ],
   "sales_available":false,
   "unique_image_url_prefixes":[
      "http://d2flb1n945r21v.cloudfront.net/production/uploaded/style/"
   ]
}

现在，如果我只想要新类别中项目的 ID，我的代码就可以工作，但我想要实现的是获取整个 JSON 文件中每个项目的 ID。这是我的代码。

<?php
$content = json_decode($json);
foreach($content->products_and_categories->new as $entry){
    echo $entry->id;
}

它返回这个：

1950
1951
1947

那么如何返回所有其他类别的 ID？谢谢您阅读此篇。

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1 回答 1

1

您只需要通过迭代每个类别和这些类别中的每个产品来稍微改变循环方法。

foreach($content->products_and_categories as $category_name => $products) {
    echo $category_name;
    foreach ($products as $product) {
        echo $product->id;
    }
}
于 2013-04-10T23:52:17.820 回答