如何将一个键附加到json的开头

Question

Here is an example of what I need. I need to append the results key at the beginning of my json results

JSON

{
  "results": [ <-- this is what I need
    {
      "id": 1,
      "text": "Option 1"
    },
    {
      "id": 2,
      "text": "Option 2"
    }
  ]
}

PHP

I am creating my json results as such with php

$sql = "SELECT * FROM table";   
$result = $GLOBALS['db']->query($sql);
$i = 0;
while ($row = $result->fetch_array()) {
    $response[$i]['id'] = $row['id'];
    $response[$i]['text'] = $row['text'];
    $data['posts'][$i] = $response[$i];
    $i++;
}
if ($result->num_rows == 0) {
    echo '[]';
} else {
    echo json_encode($data['posts']);
}

Which produces

[
    {
      "id": 1,
      "text": "Option 1"
    },
    {
      "id": 2,
      "text": "Option 2"
    }
]

How can I add that results key to my JSON?

Answer 1

Just wrap this line echo json_encode($data['posts']); with an extra level of array index e.g results. Let's do it this way-

echo json_encode(['results'=>$data['posts']]);