我在 codeigniter 中以不同格式获取 json 数据。为什么？

Question

我正在尝试使用 codeigniter 制作和返回 json 数据。我想接收这种格式的数据

[
  {
     'title': 'this is title',
     'desc':  'THis is desc'
  },
   {
     'title': 'this is title',
     'desc':  'THis is desc'
  }
]

但我是这样接收的

[[{"title":"this is title","desc":"this is desc"}],[{"title":"this is title","description":"this is desc"}]]

如何将此格式更改为上述格式？

这是我的代码

public function v1 () {
    $this->load->model('model_jokes');

    $jokes = $this->model_jokes->readJokes();
    $arr = array();
    foreach ($jokes as $joke) {
        $arr[] = array(
                array(
                    'title' => $joke->title,
                    'description' => $joke->joke
                )
            );
    }
    echo json_encode($arr);
}

Answer 1

在foreach 中赋值为

$arr[] = array(
  'title' => $joke->title,
  'description' => $joke->joke
);

否则你会得到每个$joke的多维数组。

Answer 2

您每次都在循环中添加数组元素的数组。相反，只需添加单个数组。

public function v1 () {
    $this->load->model('model_jokes');

    $jokes = $this->model_jokes->readJokes();
    $arr = array();
    foreach ($jokes as $joke) {
        $arr[] = array(
                    'title' => $joke->title,
                    'description' => $joke->joke
            );
    }
    echo json_encode($arr);
}

Answer 3

试试：

echo '<pre>'.json_encode($arr).'</pre>';