web/public/logout.php

<?php
$app = require '../app/inc.php';

if (!$app->user->logged_in)
{
    $app->redirect('login.php');
}

$confirm = filter_input(INPUT_GET, 'confirm', FILTER_VALIDATE_BOOLEAN);

if (!$confirm)
{
    $app->view('template/header', ["title" => "Bekreft avlogging"]);
    $app->view('pages/logout');
    $app->view('template/footer');
    die();
}

$app->user->logout();
$app->session->flash('Du har blitt logget av');
$app->redirect("login.php");