Predis\Command\ZSetRange::filterArguments PHP Метод

    protected function filterArguments(array $arguments)
    {
        if (count($arguments) === 4) {
            $lastType = gettype($arguments[3]);
            if ($lastType === 'string' && strtoupper($arguments[3]) === 'WITHSCORES') {
                // Used for compatibility with older versions
                $arguments[3] = array('WITHSCORES' => true);
                $lastType = 'array';
            }
            if ($lastType === 'array') {
                $options = $this->prepareOptions(array_pop($arguments));
                return array_merge($arguments, $options);
            }
        }
        return $arguments;
    }