Drupal → Очистить get форму от лишних параметров (form_build_id, form_token, form_id, op)

Если нужно отправить форму методом get на внешний адрес и при этом не хочется светить form_build_id, form_token, form_id и op:

Drupal 8

class ExampleForm extends FormBase {

  /**
   * Form builder.
   */
  public function buildForm(array $form, FormStateInterface $form_state) {
    ...
    $form['#method'] = 'GET';
    $form['#pre_render'][] = [$this, 'preRender'];

    return $form;
  }

  /**
   * Pre-render form callback.
   */
  public function preRender($form) {
    unset($form['form_id']);
    unset($form['form_build_id']);
    unset($form['form_token']);
    unset($form['submit']['#name']);
    return $form;
  }
}

Drupal 7

/**
 * Form builder.
 */
function mymodule_myform($form, &$form_state) {
  $form['#action'] = 'http://example.com/path';
  $form['#method'] = 'GET';
  $form['#pre_render'][] = 'mymodule_myform_pre_render';

  ...

  $form['submit'] = array(
    '#type' => 'submit',
    '#value' => t('Submit'),
    '#name' => '',
  );
 
  return $form;
}

/**
 * Form pre render callback.
 */
function mymodule_myform_pre_render($form) {
  unset($form['form_token']);
  unset($form['form_build_id']);
  unset($form['form_id']);
  unset($form['submit']['#name']);
  return $form;
}