class DemoBase

Same name in other branches
  1. 3.x modules/form_api_example/src/Form/DemoBase.php \Drupal\form_api_example\Form\DemoBase

Implements common submit handler used in form_api_example demo forms.

We extend FormBase, which is the simplest form base class used in Drupal, to add a common submitForm method that will display the submitted values via the Messenger service.

Hierarchy

Expanded class hierarchy of DemoBase

See also

\Drupal\Core\Form\FormBase

File

modules/form_api_example/src/Form/DemoBase.php, line 17

Namespace

Drupal\form_api_example\Form
View source
abstract class DemoBase extends FormBase {
    
    /**
     * Implements a form submit handler.
     *
     * @param array $form
     *   The render array of the currently built form.
     * @param \Drupal\Core\Form\FormStateInterface $form_state
     *   Object describing the current state of the form.
     */
    public function submitForm(array &$form, FormStateInterface $form_state) {
        // Find out what was submitted.
        $values = $form_state->getValues();
        foreach ($values as $key => $value) {
            $label = $form[$key]['#title'] ?? $key;
            // Many arrays return 0 for unselected values so lets filter that out.
            if (is_array($value)) {
                $value = array_filter($value);
            }
            // Only display for controls that have titles and values.
            if ($value) {
                $display_value = is_array($value) ? print_r($value, 1) : $value;
                $message = $this->t('Value for %title: %value', [
                    '%title' => $label,
                    '%value' => $display_value,
                ]);
                $this->messenger()
                    ->addMessage($message);
            }
        }
    }

}

Members

Title Sort descending Modifiers Object type Summary Overriden Title Overrides
DemoBase::submitForm public function Implements a form submit handler. Overrides FormInterface::submitForm 2
DependencySerializationTrait::$_entityStorages protected property
DependencySerializationTrait::$_serviceIds protected property
DependencySerializationTrait::__sleep public function 1
DependencySerializationTrait::__wakeup public function 2
FormBase::$configFactory protected property The config factory. 3
FormBase::$requestStack protected property The request stack. 1
FormBase::$routeMatch protected property The route match.
FormBase::config protected function Retrieves a configuration object.
FormBase::configFactory protected function Gets the config factory for this form. 3
FormBase::container private function Returns the service container.
FormBase::create public static function Instantiates a new instance of this class. Overrides ContainerInjectionInterface::create 111
FormBase::currentUser protected function Gets the current user. 2
FormBase::getRequest protected function Gets the request object.
FormBase::getRouteMatch protected function Gets the route match.
FormBase::logger protected function Gets the logger for a specific channel.
FormBase::redirect protected function Returns a redirect response object for the specified route.
FormBase::resetConfigFactory public function Resets the configuration factory.
FormBase::setConfigFactory public function Sets the config factory for this form.
FormBase::setRequestStack public function Sets the request stack object to use.
FormBase::validateForm public function Form validation handler. Overrides FormInterface::validateForm 57
FormInterface::buildForm public function Form constructor. 203
FormInterface::getFormId public function Returns a unique string identifying the form. 284
LoggerChannelTrait::$loggerFactory protected property The logger channel factory service.
LoggerChannelTrait::getLogger protected function Gets the logger for a specific channel.
LoggerChannelTrait::setLoggerFactory public function Injects the logger channel factory.
MessengerTrait::$messenger protected property The messenger. 16
MessengerTrait::messenger public function Gets the messenger. 16
MessengerTrait::setMessenger public function Sets the messenger.
RedirectDestinationTrait::$redirectDestination protected property The redirect destination service. 2
RedirectDestinationTrait::getDestinationArray protected function Prepares a 'destination' URL query parameter for use with \Drupal\Core\Url.
RedirectDestinationTrait::getRedirectDestination protected function Returns the redirect destination service.
RedirectDestinationTrait::setRedirectDestination public function Sets the redirect destination service.
StringTranslationTrait::$stringTranslation protected property The string translation service. 3
StringTranslationTrait::formatPlural protected function Formats a string containing a count of items.
StringTranslationTrait::getNumberOfPlurals protected function Returns the number of plurals supported by a given language.
StringTranslationTrait::getStringTranslation protected function Gets the string translation service.
StringTranslationTrait::setStringTranslation public function Sets the string translation service to use. 2
StringTranslationTrait::t protected function Translates a string to the current language or to a given language.