mr-legend_wiki/inc/Action/Logout.php

<?php

namespace dokuwiki\Action;

use dokuwiki\Action\Exception\ActionDisabledException;
use dokuwiki\Action\Exception\ActionException;
use dokuwiki\Extension\AuthPlugin;

/**
 * Class Logout
 *
 * Log out a user
 *
 * @package dokuwiki\Action
 */
class Logout extends AbstractUserAction
{
    /** @inheritdoc */
    public function minimumPermission()
    {
        return AUTH_NONE;
    }

    /** @inheritdoc */
    public function checkPreconditions()
    {
        parent::checkPreconditions();

        /** @var AuthPlugin $auth */
        global $auth;
        if (!$auth->canDo('logout')) throw new ActionDisabledException();
    }

    /** @inheritdoc */
    public function preProcess()
    {
        global $ID;
        global $INPUT;

        if (!checkSecurityToken()) throw new ActionException();

        // when logging out during an edit session, unlock the page
        $lockedby = checklock($ID);
        if ($lockedby == $INPUT->server->str('REMOTE_USER')) {
            unlock($ID);
        }

        // do the logout stuff and redirect to login
        auth_logoff();
        send_redirect(wl($ID, ['do' => 'login'], true, '&'));

        // should never be reached
        throw new ActionException('login');
    }
}