FormTestEmptySelectForm.php in Drupal 10        
                          
                  
                        
  
  
  
  
File
  core/modules/system/tests/modules/form_test/src/Form/FormTestEmptySelectForm.php
  
    View source  
  <?php
namespace Drupal\form_test\Form;
use Drupal\Core\Form\FormBase;
use Drupal\Core\Form\FormStateInterface;
class FormTestEmptySelectForm extends FormBase {
  
  public function getFormId() {
    return 'form_test_empty_select';
  }
  
  public function buildForm(array $form, FormStateInterface $form_state) {
    $form['empty_select'] = [
      '#type' => 'select',
      '#title' => t('Empty Select'),
      '#multiple' => FALSE,
      '#options' => NULL,
    ];
    return $form;
  }
  
  public function submitForm(array &$form, FormStateInterface $form_state) {
  }
}