SWDB/application/action/Logout_Action.php

<?php
/**
 * File for the logout action.
 *
 * Implements an action function to be called from the {@see Controller}.
 *
 * @author Iñigo Valentin <i@inigovalentin.com>
 * @license https://www.gnu.org/licenses/gpl-3.0.en.html GNU General Public License V3
 * @package SWDB
 */

require_once(PATH::ACTION . "Action.php");

/**
 * Logs the user out and redirects to the login page.
 *
 * Invalidates cookies and session variables.
 * 
 * @category Action
 */
class Logout_Action extends Action{
    
    /**
     * Executes the action.
     */
    function execute(){
        setcookie("user_id", null, time() - 3600);
        setcookie("user_token", null, time() - 3600);
        session_regenerate_id();
        $_SESSION['session'] = false;
        $_SESSION['user_id'] = "";
        $this->code = 204;
        $this->message = "No content.";
        header("Location: /");
        return;
    }
}