在Laravel中将集合转换为I = ID的数组

如何解决在Laravel中将集合转换为I = ID的数组

我是初学者PHP开发人员。 我的阵列有小问题。我在我的项目Laravel 7中使用 我有以下代码：

$items = collect($discount->products->toArray());

结果是我

Illuminate\Support\Collection {#1783 ▼
  #items: array:2 [▼
    0 => array:17 [▼
      "id" => 1
      "product_category_id" => 5
      "image_id" => null
      "vat_type_id" => 1
      "name" => "Produkt 1"
      "slug" => "produkt-1"
      "lead" => "<p>fewferfer</p>"
      "description" => "<p>&nbsp;</p>"
      "price" => "123.00"
      "loyalty_program_points_price" => 2
      "min_student_level" => null
      "marked_as_available_at" => "2020-09-30T11:45:51.000000Z"
      "deactivated_at" => null
      "created_at" => "2020-09-30T11:45:23.000000Z"
      "updated_at" => "2020-09-30T11:45:51.000000Z"
      "deleted_at" => null
      "pivot" => array:3 [▶]
    ]
    1 => array:17 [▼
      "id" => 2
      "product_category_id" => 5
      "image_id" => null
      "vat_type_id" => 1
      "name" => "Produkt 2"
      "slug" => "produkt-2"
      "lead" => "<p>&nbsp;</p>"
      "description" => "<p>fergfer</p>"
      "price" => "21.00"
      "loyalty_program_points_price" => 3
      "min_student_level" => null
      "marked_as_available_at" => "2020-09-30T11:45:38.000000Z"
      "deactivated_at" => null
      "created_at" => "2020-09-30T11:45:38.000000Z"
      "updated_at" => "2020-09-30T11:45:38.000000Z"
      "deleted_at" => null
      "pivot" => array:3 [▶]
    ]
  ]
}

我需要将其转换为以下结果：

Array{
    1 => 1 (id)
    2 => (id)
}

我该怎么做？ 我只需要ID值的数组

解决方法

集合具有pluck method，可让您获取特定键的所有值。要获取所有ID，您只需要做

$ids = $items->pluck('id')->all();

如果您希望它们也具有与id相同的密钥，请将其作为第二个参数传递

$ids = $items->pluck('id','id')->all();

请注意，如果产品是一种关系，那么它已经是一个集合。您无需将其转换为数组，然后再转换为集合：

$product_ids = $discount->products->pluck('id')->all();