nextcloud-server/apps/user_ldap/ajax/getNewServerConfigPrefix.php

<?php

/**
 * ownCloud - user_ldap
 *
 * @author Arthur Schiwon
 * @copyright 2013 Arthur Schiwon blizzz@owncloud.com
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
 * License as published by the Free Software Foundation; either
 * version 3 of the License, or any later version.
 *
 * This library 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 AFFERO GENERAL PUBLIC LICENSE for more details.
 *
 * You should have received a copy of the GNU Affero General Public
 * License along with this library.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

// Check user and app status
OCP\JSON::checkAdminUser();
OCP\JSON::checkAppEnabled('user_ldap');
OCP\JSON::callCheck();

$serverConnections = \OCA\user_ldap\lib\Helper::getServerConfigurationPrefixes();
sort($serverConnections);
$lk = array_pop($serverConnections);
$ln = intval(str_replace('s', '', $lk));
$nk = 's'.str_pad($ln+1, 2, '0', STR_PAD_LEFT);
OCP\JSON::success(array('configPrefix' => $nk));