class Select

Provides a form element for a drop-down menu or scrolling selection box.

Properties:

• #options: An associative array, where the keys are the values for each option, and the values are the option labels to be shown in the drop-down list. If a value is an array, it will be rendered similarly, but as an optgroup. The key of the sub-array will be used as the label for the optgroup. Nesting optgroups is not allowed.
• #empty_option: The label that will be displayed to denote no selection.
• #empty_value: The value of the option that is used to denote no selection.

Usage example:

$form['example_select'] = [
  '#type' => 'select',
  '#title' => $this->t('Select element'),
  '#options' => [
    '1' => $this->t('One'),
    '2' => [
      '2.1' => $this->t('Two point one'),
      '2.2' => $this->t('Two point two'),
    ],
    '3' => $this->t('Three'),
  ],
];

Plugin annotation

@FormElement("select")

Hierarchy

• class \Drupal\Component\Plugin\PluginBase implements DerivativeInspectionInterface, PluginInspectionInterface
  • class \Drupal\Core\Plugin\PluginBase uses DependencySerializationTrait, StringTranslationTrait
    • class \Drupal\Core\Render\Element\RenderElement implements ElementInterface
      • class \Drupal\Core\Render\Element\FormElement implements FormElementInterface
        • class \Drupal\Core\Render\Element\Select

File

core/lib/Drupal/Core/Render/Element/Select.php, line 38

Namespace

Drupal\Core\Render\Element

Members

Name	Modifiers	Type	Description
DependencySerializationTrait::$_serviceIds	protected	property	An array of service IDs keyed by property name used for serialization.
DependencySerializationTrait::__sleep	public	function
DependencySerializationTrait::__wakeup	public	function
FormElement::processAutocomplete	public static	function	Adds autocomplete functionality to elements.
FormElement::processPattern	public static	function	#process callback for #pattern form element property.
FormElement::validatePattern	public static	function	#element_validate callback for #pattern form element property.
PluginBase::$configuration	protected	property	Configuration information passed into the plugin.
PluginBase::$pluginDefinition	protected	property	The plugin implementation definition.
PluginBase::$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
PluginBase::getPluginId	public	function	Gets the plugin_id of the plugin instance. Overrides PluginInspectionInterface::getPluginId
PluginBase::__construct	public	function	Constructs a Drupal\Component\Plugin\PluginBase object.
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.
RenderElement::processGroup	public static	function	Arranges elements into groups.
RenderElement::setAttributes	public static	function	Sets a form element's class attribute. Overrides ElementInterface::setAttributes
Select::getInfo	public	function	Returns the element properties for this element. Overrides ElementInterface::getInfo
Select::preRenderSelect	public static	function	Prepares a select render element.
Select::processSelect	public static	function	Processes a select list form element.
Select::valueCallback	public static	function	Determines how user input is mapped to an element's #value property. Overrides FormElement::valueCallback
StringTranslationTrait::$stringTranslation	protected	property	The string translation service.
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.
StringTranslationTrait::t	protected	function	Translates a string to the current language or to a given language.