I am trying to create an XLS file and send it to the browser on a form submit but I cannot figure out how to do it. I am using XLS Serialization module but I'm open to all other suggestions. With this module I successfully created some views with XLS Export feature. But now I have a form and the excel file should be created on form submit depending on the submitted data.

I created the following code but if I send the form, I get no excel file to download:

class MyForm extends FormBase {
  private SerializerInterface $serializer;

  public static function create(ContainerInterface $container) {
    return new static($container->get('serializer'));

  public function __construct(SerializerInterface $serializer) {
    $this->serializer = $serializer;

  // Removed the buildForm() etc for simplicity

  public function submitForm(array &$form, FormStateInterface $form_state) {
    $response = (new StreamedResponse(function () use ($selected_values) {
      $this->serializer->serialize([[1, 2, 3], [4, 5, 6]], 'xlsx');

  • 1
    "didn't work" ? Not sure what that means exactly ... The only weird thing I can see is the ->send(), but you left out some code and you don't say what the error or problem is.
    – anonymous
    Commented Nov 3, 2021 at 8:41
  • it means when I send the form, I don't get an excel file to download
    – Elin Y.
    Commented Nov 3, 2021 at 12:02

1 Answer 1


First off, you need a serializer for xls(x), I used https://www.drupal.org/project/xls_serialization

The following example code should deliver what you need:

public function submitForm(array &$form, FormStateInterface $form_state) {
  $values = $form_state->getValues();
  $filename = "random_file_" . rand() . ".xlsx";

  $response = new StreamedResponse(function () use ($values) {
    echo $this->serializer->serialize([[1, 2, 3], [4, 5, 6]], 'xlsx');
  $response->headers->set('Content-Type', 'application/vnd.ms-excel');
  $response->headers->set('Content-Disposition', 'attachment; filename="' . $filename . '"');


I tried that with the XLS encoder provided https://www.drupal.org/project/xls_serialization and it worked.

Good luck!


  • Thank you, I worked out a working solution. But with a bit different and simpler callback function in StreamedResponse. Would you mind if I update your code?
    – Elin Y.
    Commented Nov 4, 2021 at 9:27
  • If it's the same approach, yes, please do. Otherwise, this question needs a different answer than mine. Curious in any case! The callback code I wrote in there was based off of your question, perhaps you can update the question and then I can update my answer. Commented Nov 4, 2021 at 9:30
  • Updated the code with the one worked for me. Please check my changes: drupal.stackexchange.com/posts/308007/revisions If you want you can still rollback to your version. Thanks.
    – Elin Y.
    Commented Nov 4, 2021 at 10:32
  • So, all you needed was the headers' part to get your code working, right? Commented Nov 4, 2021 at 11:50
  • Not only the headers. I also added echo to the StreamedResponse callback, and removed the send() method that I used at the beginning.
    – Elin Y.
    Commented Nov 4, 2021 at 12:51

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