在Laravel中将Blob图像作为Json响应返回

Question

我正在尝试使用存储在数据库中的图像编写一个API作为blob我没有得到JSON的响应，但得到的结果是标准对象或数组。code

{
        $menu_cat_data = [];
        $main_categories = DB::table('categories')->select('categories.id as menu_category_id', 'categories.name as menu_category_name', 
                'categories.image as menu_category_image')
                ->join('products', 'categories.id', '=', 'products.CATEGORY')
                ->where('categories.SITEGUID', '=', $id)
                ->distinct()
                ->get();

        if (count($main_categories) > 0) {
            $cnt = 0;
            $menu_cat_data = [];

            foreach ($main_categories as $main_categorys) {
            $main_categorys['menu_category_image'];
                $menu_cat_data['menu'][$main_categorys-   >menu_category_id] = (array) $main_categorys;
                $products = DB::table('products')->select('products.id as menu_item_id', 'products.name as menu_item_name', 
                        'products.PRICESELL as rate', 'products.image as menu_product_image')
                        ->where('products.SITEGUID', '=', $id)
                        ->where('products.category', '=', $main_categorys->menu_category_id)
                        ->join('categories', 'products.category', '=', 'categories.id')
                        ->distinct()
                        ->get();
                if (count($products) > 0) {
                    foreach ($products as $product) {
                        $menu_cat_data['menu'][$main_categorys->menu_category_id]['items'][$product->menu_item_id] = (array) $product;
                    }
                }
            }
        }

        $response = json_encode($menu_cat_data);
        print_r($response);
    }