Cloudinary\Uploader::multi PHP Method

    public static function multi($tag, $options = array())
    {
        $transformation = \Cloudinary::generate_transformation_string($options);
        $params = array("timestamp" => time(), "tag" => $tag, "format" => \Cloudinary::option_get($options, "format"), "async" => \Cloudinary::option_get($options, "async"), "notification_url" => \Cloudinary::option_get($options, "notification_url"), "transformation" => $transformation);
        return Uploader::call_api("multi", $params, $options);
    }