Question

我正在尝试从数组中获取JSON，但在输出中得到了一个额外的方括号。

我尝试使用$episode[0] = $podcast->getPodcastByCategoryId($id);，但是它只给出不完整的输出，意味着它给出了数组中第一次迭代的数据。而且，如果我从$ episode中删除[]，它也会给出第一次迭代的数据。

$podList = $category->getCategoryPodcast();

if ($podList) {

    foreach ($podList as $items) {

        $id = $items->id;

        $episode[] = $podcast->getPodcastByCategoryId($id); 

    } 

}

echo json_encode($episode);

我希望只有一个方括号，但是我得到的输出带有两个方括号。

这是我从上面的代码中收到的信息：

[
[
    {
      "id": "6",
      "title": "Types of loops in PHP.",
      "description": "s.kfjhsdlufdgf o",
      "duration": "0:05:05",
      "audio": "http://demo.web/uploads/podAudio/PodAudio-2019011511270942.mp3",
      "image": "http://demo.web/uploads/podImage/PodImage-20190115112709469.jpg",
      "category": "2",
      "added_date": "माघ १, २०७५",
      "category_title": "उमेर",
      "author": "John Doe",
      "episodes": "2"
    },
    {
      "id": "4",
      "title": "How to remove square brackets from JSON?",
      "description": "",
      "duration": "",
      "audio": "http://demo.web/uploads/podAudio/PodAudio-20190114111541297.mp3",
      "image": "http://demo.web/uploads/podImage/PodImage-20190114102432145.jpg",
      "category": "2",
      "added_date": "पौष ३०, २०७५",
      "category_title": "उमेर",
      "author": "John Doe",
      "episodes": "2"
    }
  ],
  [
    {
      "id": "5",
      "title": "Hello World!",
      "description": "",
      "duration": "",
      "audio": "http://demo.web/uploads/podAudio/PodAudio-20190114111937115.mp3",
      "image": "http://demo.web/uploads/podImage/PodImage-20190114104302103.jpg",
      "category": "1",
      "added_date": "पौष ३०, २०७५",
      "category_title": "गृह पृष्ठ",
      "author": "John Doe",
      "episodes": "1"
    }
  ]
]

根据@ splash58和@Vinesh Goyal的建议，我得到这样的输出：

[[
{
  "id": "6",
  "title": "Types of loops in PHP.",
  "description": "s.kfjhsdlufdgf o",
  "duration": "0:05:05",
  "audio": "http://demo.web/uploads/podAudio/PodAudio-2019011511270942.mp3",
  "image": "http://demo.web/uploads/podImage/PodImage-20190115112709469.jpg",
  "category": "2",
  "added_date": "माघ १, २०७५",
  "category_title": "उमेर",
  "author": "John Doe",
  "episodes": "2"
},
{
  "id": "4",
  "title": "How to remove square brackets from JSON?",
  "description": "",
  "duration": "",
  "audio": "http://demo.web/uploads/podAudio/PodAudio-20190114111541297.mp3",
  "image": "http://demo.web/uploads/podImage/PodImage-20190114102432145.jpg",
  "category": "2",
  "added_date": "पौष ३०, २०७५",
  "category_title": "उमेर",
  "author": "John Doe",
  "episodes": "2"
}
  ],

    {
      "id": "5",
      "title": "Hello World!",
      "description": "",
      "duration": "",
      "audio": "http://demo.web/uploads/podAudio/PodAudio-20190114111937115.mp3",
      "image": "http://demo.web/uploads/podImage/PodImage-20190114104302103.jpg",
      "category": "1",
      "added_date": "पौष ३०, २०७५",
      "category_title": "गृह पृष्ठ",
      "author": "John Doe",
      "episodes": "1"
    }
]

但是，第一个数据的方括号呢？

Answer 1

您可以在获取时合并数组

$episode = array_merge($episode, $podcast->getPodcastByCategoryId($id));

或者在转换为json之前将结果数组展平

echo json_encode(array_merge(...$episode));

demo

Answer 2

使用javascript .concat()跟随以下代码段。这符合您想要的输出吗？

var data = [[
    {
      "id": "6",
      "title": "Types of loops in PHP.",
      "description": "s.kfjhsdlufdgf o",
      "duration": "0:05:05",
      "audio": "http://demo.web/uploads/podAudio/PodAudio-2019011511270942.mp3",
      "image": "http://demo.web/uploads/podImage/PodImage-20190115112709469.jpg",
      "category": "2",
      "added_date": "माघ १, २०७५",
      "category_title": "उमेर",
      "author": "John Doe",
      "episodes": "2"
    },
    {
      "id": "4",
      "title": "How to remove square brackets from JSON?",
      "description": "",
      "duration": "",
      "audio": "http://demo.web/uploads/podAudio/PodAudio-20190114111541297.mp3",
      "image": "http://demo.web/uploads/podImage/PodImage-20190114102432145.jpg",
      "category": "2",
      "added_date": "पौष ३०, २०७५",
      "category_title": "उमेर",
      "author": "John Doe",
      "episodes": "2"
    }
  ],
  [
    {
      "id": "5",
      "title": "Hello World!",
      "description": "",
      "duration": "",
      "audio": "http://demo.web/uploads/podAudio/PodAudio-20190114111937115.mp3",
      "image": "http://demo.web/uploads/podImage/PodImage-20190114104302103.jpg",
      "category": "1",
      "added_date": "पौष ३०, २०७५",
      "category_title": "गृह पृष्ठ",
      "author": "John Doe",
      "episodes": "1"
    }
  ]
];
var mergedData = data[0].concat(data[1]);
console.log(mergedData)

Answer 3

根据您的代码，$podcast->getPodcastByCategoryId($id);返回一个数组，以便t0消除您可以使用array_merge函数的问题

$podList = $category->getCategoryPodcast();
$episode = [];
if ($podList) {

    foreach ($podList as $items) {

        $id = $items->id;

       $episode = array_merge($episode, $podcast->getPodcastByCategoryId($id)

    } 

}

echo json_encode($episode);

我希望它会对您有所帮助：）

如何从具有多个数组的JSON中删除多余的方括号

3 个答案: