Anonymous array

In case you need to convert an array of data into an array of class objects, you can implement this through an anonymous array. To do this, you just need to wrap the class in [].

$data = [
    ['id' => 1, 'name' => 'phone'],
    ['id' => 2, 'name' => 'bread'],
];
$products = ClassTransformer::transform([ProductDTO::class], $data);

The result of this execution you will get an array of ProductDTO objects:

array(2) {
  [0]=>
      object(ProductDTO) {
        ["id"]=> int(1)
        ["name"]=> string(5) "phone"
      }
  [1]=>
      object(ProductDTO) {
        ["id"]=> int(2)
        ["name"]=> string(5) "bread"
      }
}

You may also need an element-by-element array transformation. In such a case, you can pass an array of classes, which can then be easily unpacked:

$userData = ['id' => 1, 'email' => 'test@test.com', 'balance' => 10012.23];
$purchaseData = [
    'products' => [
        ['id' => 1, 'name' => 'phone'],
        ['id' => 2, 'name' => 'bread'],
    ],
    'user' => ['id' => 3, 'email' => 'fake@mail.com', 'balance' => 10012.23],
];

$result = ClassTransformer::transform([UserDTO::class, PurchaseDTO::class], [$userData, $purchaseData]);

[$user, $purchase] = $result;
var_dump($user);
var_dump($purchase);

Result:

object(UserDTO) (3) {
  ["id"] => int(1)
  ["email"]=> string(13) "test@test.com"
  ["balance"]=> float(10012.23)
}

object(PurchaseDTO) (2) {
  ["products"]=>
  array(2) {
    [0]=>
    object(ProductDTO)#349 (3) {
      ["id"]=> int(1)
      ["name"]=> string(5) "phone"
    }
    [1]=>
    object(ProductDTO)#348 (3) {
      ["id"]=> int(2)
      ["name"]=> string(5) "bread"
    }
  }
  ["user"]=>
  object(UserDTO)#332 (3) {
    ["id"]=> int(3)
    ["email"]=> string(13) "fake@mail.com"
    ["balance"]=> float(10012.23)
  }
}