Sort JSON date by date - PHP - php

Question

I have a site grabbing Confluence blogpost data. The API im using doesn't appear to have a sort feature. Can anyone help me get PHP sorting the posts on the page by the JSON date, i need the most recent first. Thanks!
<?php
require_once($_SERVER["DOCUMENT_ROOT"].'/layout/layout.inc.php');
require_once($_SERVER["DOCUMENT_ROOT"].'/functions/general.inc.php');
$layout = new my_layout();
$layout->title('IT KB Search');
$layout->content("<div class='border'>");
$layout->content('<h1>IT Support Knowledge Base - Search Results</h1>');
$baseUrl = 'https://website.atlassian.net/wiki';
$url = $baseUrl.'/rest/api/content?spaceKey=KB&type=blogpost&start=0&limit=10&expand=space,history,body.view,metadata.labels';
// To enable authenticated search:
// $url .= "&os_username=$username&os_password=$password";
$response = file_get_contents($url);
$response = json_decode($response);
$results = $response->results;
$html .= '<dl style=list-style: none;>';
foreach($results as $item) {
$date = $item-> history-> createdDate;
$html .= '<strong><a href="';
$html .= $baseUrl. $item-> _links-> webui;
$html .= '" target="_blank">';
$html .= $item->title;
$html .= ' - ';
$html .= date("d/m/Y",strtotime($date));
$html .= '</a></strong><br>';
$html .= $item->body-> view-> value;
$html .= '<br>';
}
$html .= '</dl>';
$layout->content($html);
$layout->content('</div>');
$layout->render();

Answer 1

Before foreach loop, you can use usort like this
usort($results, function ($a, $b) {
return strtotime($a->history->createdDate) - strtotime($b->history-> createdDate);
});
Once done, $result will have data in sorted order $a-$b will give you data in ascending order and $b-$a will give you data in descending order

Answer 2

You can try something like :-
function date_compare($a, $b)
{
$t1 = strtotime($a['datetime']);
$t2 = strtotime($b['datetime']);
return $t1 - $t2;
}
usort($results, 'date_compare');
You can declare the function date_compare in your php file and use the statement:-
usort($results, 'date_compare');
just before the for each loop