如何将元素添加到数组对象中？

Question

如果我有这样的json数组：

{
 "code": 1,
 "data_question": [
 {
   "id_question": "9",
   "id_user": "9",
   "name": "name"
 }
],
"last_page": 1,
"count_data": 8
}

我的问题是如何在data_question对象中添加一个元素，如下所示：

{
 "code": 1,
 "data_question": [
 {
   "id_question": "9",
   "id_user": "9",
   "name": "name"
   "age":"12" <--------
 }
],
"last_page": 1,
"count_data": 8
}

请看看这个screeshot： Image PHP Code Image JSON

感谢您的帮助：）

Answer 1

这可能会对您有所帮助：

<?php 
$txt = '{
 "code": 1,
 "data_question": [
 {
   "id_question": "9",
   "id_user": "9",
   "name": "name"
 }
],
"last_page": 1,
"count_data": 8
}';

$data = json_decode($txt,true);
$data['data_question'][0]['age'] = 12; 
echo json_encode($data,JSON_PRETTY_PRINT);

Answer 2

请尝试：

$array["data_question"][0]["age"] = "12";     
echo json_encode($array);