tinymce-editor/Application/fileman/php/downloaddir.php

<?php
/*
  RoxyFileman - web based file manager. Ready to use with CKEditor, TinyMCE.
  Can be easily integrated with any other WYSIWYG editor or CMS.

  Copyright (C) 2013, RoxyFileman.com - Lyubomir Arsov. All rights reserved.
  For licensing, see LICENSE.txt or http://RoxyFileman.com/license

  This program is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation, either version 3 of the License.

  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with this program.  If not, see <http://www.gnu.org/licenses/>.

  Contact: Lyubomir Arsov, liubo (at) web-lobby.com
*/
include '../system.inc.php';
include 'functions.inc.php';
@ini_set('memory_limit', '-1');
verifyAction('DOWNLOADDIR');
checkAccess('DOWNLOADDIR');

$path = RoxyFile::FixPath(trim($_GET['d']));
verifyPath($path);
$path = fixPath($path);

if (!class_exists('ZipArchive')) {
    echo '<script>alert("Cannot create zip archive - ZipArchive class is missing. Check your PHP version and configuration");</script>';
} else {
    try {
        $filename = basename($path);
        $zipFile = $filename . '.zip';
        $zipPath = BASE_PATH . '/tmp/' . $zipFile;
        RoxyFile::ZipDir($path, $zipPath);

        header('Content-Disposition: attachment; filename="' . $zipFile . '"');
        header('Content-Type: application/force-download');
        readfile($zipPath);
        function deleteTmp(string $zipPath): void
        {
            @unlink($zipPath);
        }

        register_shutdown_function('deleteTmp', $zipPath);
    } catch (Exception $ex) {
        echo '<script>alert("' . addslashes(t('E_CreateArchive')) . '");</script>';
    }
}