itskp-odense/Backend/controller/updateUser.php

<?php
session_start();
require "../../bootstrap.php";

use Backend\Model\User;

if(isset($_SESSION['permission'])){
    $user = User::query()->find($_POST['id']);


    if(!empty($_POST['upName'])){
        $user->name = $_POST['upName'];
    }

    if(!empty($_POST['upPassword'])){
        $newPass = password_hash($_POST['upPassword'], PASSWORD_DEFAULT);
        $user->password = $newPass;
    }

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