public function getActiveServers()
    {
        $activeServers = [];

        if (isset($this->config['servers']) && is_array($this->config['servers'])) {
            foreach ($this->config['servers'] as $server) {
                if (isset($server['active']) && isset($server['objectClass']) && $server['active']) {
                    $activeServers[] = $server['name'];
                }
            }
        }

        return $activeServers;
    }