class Hidden

Provides a form element for an HTML 'hidden' input element.

Specify either #default_value or #value but not both.

Properties:

  • #default_value: The initial value of the form element. JavaScript may alter the value prior to submission.
  • #value: The value of the form element. The Form API ensures that this value remains unchanged by the browser.

Usage example:

$form['entity_id'] = array(
  '#type' => 'hidden',
  '#value' => $entity_id,
);

Plugin annotation

@FormElement("hidden");

Hierarchy

Expanded class hierarchy of Hidden

See also

\Drupal\Core\Render\Element\Value

154 string references to 'Hidden'
BaseFieldDefinition::setDisplayConfigurable in core/lib/Drupal/Core/Field/BaseFieldDefinition.php
Sets whether the display for the field can be configured.
block.block.test_block.yml in core/modules/block/tests/modules/block_test/config/install/block.block.test_block.yml
core/modules/block/tests/modules/block_test/config/install/block.block.test_block.yml
block_content_entity_display.yml in core/modules/block_content/migrations/block_content_entity_display.yml
core/modules/block_content/migrations/block_content_entity_display.yml
ClaroEntityDisplayTest::testEntityForm in core/tests/Drupal/FunctionalJavascriptTests/Theme/ClaroEntityDisplayTest.php
Copied from parent.
claro_preprocess_views_exposed_form in core/themes/claro/claro.theme
Implements hook_preprocess_HOOK() for views_exposed_form.

... See full list

39 #type uses of Hidden
AddFormBase::buildForm in core/modules/media_library/src/Form/AddFormBase.php
Form constructor.
BlockForm::form in core/modules/block/src/BlockForm.php
Gets the actual form array to be built.
BlockListBuilder::buildBlocksForm in core/modules/block/src/BlockListBuilder.php
Builds the main "Blocks" portion of the form.
BookAdminEditForm::bookAdminTable in core/modules/book/src/Form/BookAdminEditForm.php
Builds the table portion of the form for the book administration page.
BookAdminEditForm::bookAdminTableTree in core/modules/book/src/Form/BookAdminEditForm.php
Helps build the main table in the book administration page form.

... See full list

File

View on git.drupalcode.org

core/lib/Drupal/Core/Render/Element/Hidden.php, line 27

Namespace

Drupal\Core\Render\Element
View source 
class Hidden extends FormElement {
  
  /**
   * {@inheritdoc}
   */
  public function getInfo() {
    $class = static::class;
    return [
      '#input' => TRUE,
      '#process' => [
        [
          $class,
          'processAjaxForm',
        ],
      ],
      '#pre_render' => [
        [
          $class,
          'preRenderHidden',
        ],
      ],
      '#theme' => 'input__hidden',
    ];
  }
  
  /**
   * Prepares a #type 'hidden' render element for input.html.twig.
   *
   * @param array $element
   *   An associative array containing the properties of the element.
   *   Properties used: #name, #value, #attributes.
   *
   * @return array
   *   The $element with prepared variables ready for input.html.twig.
   */
  public static function preRenderHidden($element) {
    $element['#attributes']['type'] = 'hidden';
    Element::setAttributes($element, [
      'name',
      'value',
    ]);
    return $element;
  }

}

Members

Title Modifiers Object type Summary Overriden Title Overrides
DependencySerializationTrait::$_entityStorages protected property An array of entity type IDs keyed by the property name of their storages.
DependencySerializationTrait::$_serviceIds protected property An array of service IDs keyed by property name used for serialization.
DependencySerializationTrait::__sleep public function 2
DependencySerializationTrait::__wakeup public function #[\ReturnTypeWillChange] 2
FormElement::processAutocomplete public static function Adds autocomplete functionality to elements.
FormElement::processPattern public static function #process callback for #pattern form element property.
FormElement::validatePattern public static function #element_validate callback for #pattern form element property.
FormElement::valueCallback public static function Determines how user input is mapped to an element's #value property. Overrides FormElementInterface::valueCallback 16
Hidden::getInfo public function Returns the element properties for this element. Overrides ElementInterface::getInfo 1
Hidden::preRenderHidden public static function Prepares a #type 'hidden' render element for input.html.twig.
MessengerTrait::$messenger protected property The messenger. 27
MessengerTrait::messenger public function Gets the messenger. 27
MessengerTrait::setMessenger public function Sets the messenger.
PluginBase::$configuration protected property Configuration information passed into the plugin. 1
PluginBase::$pluginDefinition protected property The plugin implementation definition. 1
PluginBase::$pluginId protected property The plugin_id.
PluginBase::DERIVATIVE_SEPARATOR constant A string which is used to separate base plugin IDs from the derivative ID.
PluginBase::getBaseId public function Gets the base_plugin_id of the plugin instance. Overrides DerivativeInspectionInterface::getBaseId
PluginBase::getDerivativeId public function Gets the derivative_id of the plugin instance. Overrides DerivativeInspectionInterface::getDerivativeId
PluginBase::getPluginDefinition public function Gets the definition of the plugin implementation. Overrides PluginInspectionInterface::getPluginDefinition 2
PluginBase::getPluginId public function Gets the plugin_id of the plugin instance. Overrides PluginInspectionInterface::getPluginId
PluginBase::isConfigurable public function Determines if the plugin is configurable.
PluginBase::__construct public function Constructs a \Drupal\Component\Plugin\PluginBase object. 85
RenderElement::preRenderAjaxForm public static function Adds Ajax information about an element to communicate with JavaScript.
RenderElement::preRenderGroup public static function Adds members of this group as actual elements for rendering.
RenderElement::processAjaxForm public static function Form element processing handler for the #ajax form property. 1
RenderElement::processGroup public static function Arranges elements into groups.
RenderElement::setAttributes public static function Sets a form element's class attribute. Overrides ElementInterface::setAttributes
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.

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