Predis\Command\ZSetUnionStore::prepareOptions PHP Метод

    private function prepareOptions($options)
    {
        $opts = array_change_key_case($options, CASE_UPPER);
        $finalizedOpts = array();
        if (isset($opts['WEIGHTS']) && is_array($opts['WEIGHTS'])) {
            $finalizedOpts[] = 'WEIGHTS';
            foreach ($opts['WEIGHTS'] as $weight) {
                $finalizedOpts[] = $weight;
            }
        }
        if (isset($opts['AGGREGATE'])) {
            $finalizedOpts[] = 'AGGREGATE';
            $finalizedOpts[] = $opts['AGGREGATE'];
        }
        return $finalizedOpts;
    }