public function FormBuilder::submitForm in Drupal 8

Same name and namespace in other branches

9 core/lib/Drupal/Core/Form/FormBuilder.php \Drupal\Core\Form\FormBuilder::submitForm()

Retrieves, populates, and processes a form.

This function allows you to supply values for form elements and submit a form for processing. Compare to self::getForm(), which also builds and processes a form, but does not allow you to supply values.

There is no return value, but you can check to see if there are errors by calling $form_state->getErrors().

For example:

// register a new user
$form_state = new FormState();
$values['name'] = 'robo-user';
$values['mail'] = 'robouser@example.com';
$values['pass']['pass1'] = 'password';
$values['pass']['pass2'] = 'password';
$values['op'] = t('Create new account');
$form_state
  ->setValues($values);
\Drupal::formBuilder()
  ->submitForm('user_register_form', $form_state);

Parameters

\Drupal\Core\Form\FormInterface|string $form_arg: The value must be one of the following:

The name of a class that implements \Drupal\Core\Form\FormInterface.
An instance of a class that implements \Drupal\Core\Form\FormInterface.

$form_state: The current state of the form. Most important is the $form_state->getValues() collection, a tree of data used to simulate the incoming \Drupal::request()->request information from a user's form submission. If a key is not filled in $form_state->getValues(), then the default value of the respective element is used. To submit an unchecked checkbox or other control that browsers submit by not having a \Drupal::request()->request entry, include the key, but set the value to NULL.

...: Any additional arguments are passed on to the functions called by self::submitForm(), including the unique form constructor function. For example, the node_edit form requires that a node object be passed in here when it is called. Arguments that need to be passed by reference should not be included here, but rather placed directly in the $form_state build info array so that the reference can be preserved. For example, a form builder function with the following signature:

function mymodule_form($form, FormStateInterface &$form_state, &$object) {
}

would be called via self::submitForm() as follows:

$form_state
  ->setValues($my_form_values);
$form_state
  ->addBuildInfo('args', [
  &$object,
]);
\Drupal::formBuilder()
  ->submitForm('mymodule_form', $form_state);

Overrides FormBuilderInterface::submitForm

File

core/lib/Drupal/Core/Form/FormBuilder.php, line 472

Class

FormBuilder: Provides form building and processing.

Namespace

Drupal\Core\Form

Code

public function submitForm($form_arg, FormStateInterface &$form_state) {
  $build_info = $form_state
    ->getBuildInfo();
  if (empty($build_info['args'])) {
    $args = func_get_args();

    // Remove $form and $form_state from the arguments.
    unset($args[0], $args[1]);
    $form_state
      ->addBuildInfo('args', array_values($args));
  }

  // Populate FormState::$input with the submitted values before retrieving
  // the form, to be consistent with what self::buildForm() does for
  // non-programmatic submissions (form builder functions may expect it to be
  // there).
  $form_state
    ->setUserInput($form_state
    ->getValues());
  $form_state
    ->setProgrammed();
  $form_id = $this
    ->getFormId($form_arg, $form_state);
  $form = $this
    ->retrieveForm($form_id, $form_state);

  // Programmed forms are always submitted.
  $form_state
    ->setSubmitted();

  // Reset form validation.
  $form_state
    ->setValidationEnforced();
  $form_state
    ->clearErrors();
  $this
    ->prepareForm($form_id, $form, $form_state);
  $this
    ->processForm($form_id, $form, $form_state);
}

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