nextcloud/apps/files_encryption/settings.php

<?php
/**
 * Copyright (c) 2011 Robin Appelman <icewind@owncloud.com>
 * This file is licensed under the Affero General Public License version 3 or
 * later.
 * See the COPYING-README file.
 */

OC_Util::checkAdminUser();

$tmpl = new OCP\Template( 'files_encryption', 'settings');
$blackList=explode(',', OCP\Config::getAppValue('files_encryption',
												'type_blacklist',
												'jpg,png,jpeg,avi,mpg,mpeg,mkv,mp3,oga,ogv,ogg'));
$enabled=(OCP\Config::getAppValue('files_encryption', 'enable_encryption', 'true')=='true');
$tmpl->assign('blacklist', $blackList);
$tmpl->assign('encryption_enabled', $enabled);

OCP\Util::addscript('files_encryption', 'settings');
OCP\Util::addscript('core', 'multiselect');

return $tmpl->fetchPage();