Laravel 如何以格式化的方式打印此集合？

我在数据库中存储了购物车，希望将其与订单号关联，以便查看订单项目。我使用

cart:：store（$identifier）

存储购物车，并使用

$d=DB:：table（'shoppingcart'）->get（）检索购物车。如何打印此内容

我尝试过使用foreach循环，但没有帮助

+"content": "O:29:"Illuminate\Support\Collection":1:{s:8:"\x00*\x00items";a:2:{s:32:"07cca15168b1a5e48e0f89d878fbf6ea";O:32:"Gloudemans\Shoppingcart\CartItem":9:{s:5:"rowId";s:32:"07cca15168b1a5e48e0f89d878fbf6ea";s:2:"id";s:2:"16";s:3:"qty";i:1;s:4:"name";s:19:"Dr. Granville Braun";s:5:"price";d:515;s:7:"options";O:39:"Gloudemans\Shoppingcart\CartItemOptions":1:{s:8:"\x00*\x00items";a:0:{}}s:49:"\x00Gloudemans\Shoppingcart\CartItem\x00associatedModel";s:11:"App\Product";s:41:"\x00Gloudemans\Shoppingcart\CartItem\x00taxRate";i:21;s:41:"\x00Gloudemans\Shoppingcart\CartItem\x00isSaved";b:0;}s:32:"027c91341fd5cf4d2579b49c4b6a90da";O:32:"Gloudemans\Shoppingcart\CartItem":9:{s:5:"rowId";s:32:"027c91341fd5cf4d2579b49c4b6a90da";s:2:"id";s:1:"1";s:3:"qty";i:1;s:4:"name";s:17:"Double Wall Glass";s:5:"price";d:547;s:7:"options";O:39:"Gloudemans\Shoppingcart\CartItemOptions":1:{s:8:"\x00*\x00items";a:0:{}}s:49:"\x00Gloudemans\Shoppingcart\CartItem\x00associatedModel";s:11:"App\Product";s:41:"\x00Gloudemans\Shoppingcart\CartItem\x00taxRate";i:21;s:41:"\x00Gloudemans\Shoppingcart\CartItem\x00isSaved";b:0;}}} ◀"

您可以按如下方式获取数组格式的数据：

$d = DB::table('shoppingcart')->get()->toArray();