我不能将json数组格式化为所需的格式

Question

i have json array that i generate from php. However the format is not what i want. i have related questions but it is not the format i want Please see below what i did and tried vs what i want

    //////////////
$data variable array
///////////////

Array
    (
        [0] => Array
            (
                [id] => 2
                [start_date] => 2018-05-17 08:40
                [end_date] => 2018-05-17 09:00
            )

        [1] => Array
            (
                [id] => 3
                [start_date] => 2018-05-17 08:40
                [end_date] => 2018-05-17 09:00
            )
      )

This is what i do

$array[] = $data;
echo json_encode($array);

The output

[
 {"id":2,"start_date":"2018-05-17 08:40","end_date":"2018-05-17 09:00"},
 {"id":3,"start_date":"2018-05-17 08:40","end_date":"2018-05-17 09:00"}
]

This is what i tried

$array["data"] = $data;
echo json_encode($array);

The output

{"data":
 {"id":2,"start_date":"2018-05-17 08:40","end_date":"2018-05-17 09:00"},
 {"id":3,"start_date":"2018-05-17 08:40","end_date":"2018-05-17 09:00"}
}

The output i want

{
  "data": [
             {"id":2,"start_date":"2018-05-17 08:40","end_date":"2018-05-17 09:00"},
             {"id":3,"start_date":"2018-05-17 08:40","end_date":"2018-05-17 09:00"}
          ]
}

Answer 1

you have to build an array first, then construct an object. See below

$array = [
    [
        "id" => 2,
        "start_date" => "2018-05-17 08:40",
        "end_date" => "2018-05-17 09:00"
    ],
    [
        "id" => 3,
        "start_date" => "2018-05-17 08:40",
        "end_date" => "2018-05-17 09:00"
    ]
];
$data["data"] = $array;
echo json_encode($data);