itskp-odense/Backend/controller/update.php

<?php

require "../../bootstrap.php";

use Backend\Model\Post;

if(isset($_POST['id'])){
    $post = Post::query()->find($_POST['id']);
    $post->title = $_POST['upTitle'];
    $post->description = $_POST['upDescription'];

    if($post->update()){
        return 1;
    }
}