Sort JSON by ID - php

Question

I have following JSON file:
[{
"id": 9,
"title": "Birthday",
"description": "Debut Party",
"start": "2017-07-25T15:01",
"end": "2017-08-03T00:01",
"url": "https:\/\/bd.com"
}, {
"id": 11,
"title": "Anniversary",
"description": "First Ann",
"start": "2017-06-28T15:00",
"end": "2017-07-08T02:58",
"url": "https:\/\/anniversary.com\/"
}, {
"id": 5,
"title": "Anniversary",
"description": "First Ann",
"start": "2017-06-28T15:00",
"end": "2017-07-08T02:58",
"url": "https:\/\/anniversary.com\/"
}]
I want them to be sorted by id like 5,9,11 using PHP. How Can I do that?

Answer 1

First decode the JSON
$array = json_decode($json,true);
and then use usort to sort by id or something else.
function sortById($a, $b) {
return $b->id - $a->id;
}
usort($array,"sortById");

Answer 2

SELECT * FROM test ORDER BY `id` DESC;
use this query in you php file.
example :
function getPosts()
{
$connection = mysqli_connect("localhost", "root", "", DatabaseManager::DATABASE_NAME);
$sqlQuery = "SELECT * FROM posts order by 'id' desc;";
$result = $connection->query($sqlQuery);
$postsArray = array();
if ($result->num_rows > 0) {
for ($i = 0; $i < $result->num_rows; $i++) {
$postsArray[$i] = $result->fetch_assoc();
}
}
echo json_encode($postsArray);
}