class File

Same name in this branch
  1. 9 core/modules/media/src/Plugin/media/Source/File.php \Drupal\media\Plugin\media\Source\File
  2. 9 core/modules/file/src/Entity/File.php \Drupal\file\Entity\File
  3. 9 core/modules/file/src/Plugin/views/field/File.php \Drupal\file\Plugin\views\field\File
  4. 9 core/modules/file/src/Plugin/views/wizard/File.php \Drupal\file\Plugin\views\wizard\File
  5. 9 core/modules/file/src/Plugin/migrate/source/d6/File.php \Drupal\file\Plugin\migrate\source\d6\File
  6. 9 core/modules/file/src/Plugin/migrate/source/d7/File.php \Drupal\file\Plugin\migrate\source\d7\File
Same name and namespace in other branches
  1. 8.9.x core/modules/media/src/Plugin/media/Source/File.php \Drupal\media\Plugin\media\Source\File
  2. 8.9.x core/modules/file/src/Entity/File.php \Drupal\file\Entity\File
  3. 8.9.x core/modules/file/src/Plugin/views/field/File.php \Drupal\file\Plugin\views\field\File
  4. 8.9.x core/modules/file/src/Plugin/views/wizard/File.php \Drupal\file\Plugin\views\wizard\File
  5. 8.9.x core/modules/file/src/Plugin/migrate/source/d6/File.php \Drupal\file\Plugin\migrate\source\d6\File
  6. 8.9.x core/modules/file/src/Plugin/migrate/source/d7/File.php \Drupal\file\Plugin\migrate\source\d7\File
  7. 8.9.x core/lib/Drupal/Core/Render/Element/File.php \Drupal\Core\Render\Element\File
  8. 10 core/modules/media/src/Plugin/media/Source/File.php \Drupal\media\Plugin\media\Source\File
  9. 10 core/modules/file/src/Entity/File.php \Drupal\file\Entity\File
  10. 10 core/modules/file/src/Plugin/views/field/File.php \Drupal\file\Plugin\views\field\File
  11. 10 core/modules/file/src/Plugin/views/wizard/File.php \Drupal\file\Plugin\views\wizard\File
  12. 10 core/modules/file/src/Plugin/migrate/source/d6/File.php \Drupal\file\Plugin\migrate\source\d6\File
  13. 10 core/modules/file/src/Plugin/migrate/source/d7/File.php \Drupal\file\Plugin\migrate\source\d7\File
  14. 10 core/lib/Drupal/Core/Render/Element/File.php \Drupal\Core\Render\Element\File
  15. 11.x core/modules/media/src/Plugin/media/Source/File.php \Drupal\media\Plugin\media\Source\File
  16. 11.x core/modules/file/src/Entity/File.php \Drupal\file\Entity\File
  17. 11.x core/modules/file/src/Plugin/views/field/File.php \Drupal\file\Plugin\views\field\File
  18. 11.x core/modules/file/src/Plugin/views/wizard/File.php \Drupal\file\Plugin\views\wizard\File
  19. 11.x core/modules/file/src/Plugin/migrate/source/d6/File.php \Drupal\file\Plugin\migrate\source\d6\File
  20. 11.x core/modules/file/src/Plugin/migrate/source/d7/File.php \Drupal\file\Plugin\migrate\source\d7\File
  21. 11.x core/lib/Drupal/Core/Render/Element/File.php \Drupal\Core\Render\Element\File

Provides a form element for uploading a file.

If you add this element to a form the enctype="multipart/form-data" attribute will automatically be added to the form element.

Properties:

  • #multiple: A Boolean indicating whether multiple files may be uploaded.
  • #size: The size of the file input element in characters.

The value of this form element will always be an array of \Symfony\Component\HttpFoundation\File\UploadedFile objects, regardless of whether #multiple is TRUE or FALSE

Plugin annotation

@FormElement("file");

Hierarchy

Expanded class hierarchy of File

316 string references to 'File'
AccessTest::setUp in core/modules/file/tests/src/Kernel/AccessTest.php
AjaxFileManagedMultipleTest::testMultipleFilesUpload in core/modules/file/tests/src/FunctionalJavascript/AjaxFileManagedMultipleTest.php
Tests if managed file form element works well with multiple files upload.
AnnotatedClassDiscoveryTest::provideBadAnnotations in core/tests/Drupal/Tests/Component/Plugin/Discovery/AnnotatedClassDiscoveryTest.php
All the Drupal documentation standards tags.
AssetResolver::getCssAssets in core/lib/Drupal/Core/Asset/AssetResolver.php
Returns the CSS assets for the current response's libraries.
AssetResolver::getJsAssets in core/lib/Drupal/Core/Asset/AssetResolver.php
Returns the JavaScript assets for the current response's libraries.

... See full list

12 #type uses of File
ConfigImportForm::buildForm in core/modules/config/src/Form/ConfigImportForm.php
Form constructor.
FileTestForm::buildForm in core/modules/file/tests/file_test/src/Form/FileTestForm.php
Form constructor.
FileTestSaveUploadFromForm::buildForm in core/modules/file/tests/file_test/src/Form/FileTestSaveUploadFromForm.php
Form constructor.
FormElementsRenderTest::testDrupalRenderFormElements in core/modules/system/tests/src/Kernel/Common/FormElementsRenderTest.php
Tests rendering form elements without using doBuildForm().
FormTest::testRequiredFields in core/modules/system/tests/src/Functional/Form/FormTest.php
Check several empty values for required forms elements.

... See full list

File

core/lib/Drupal/Core/Render/Element/File.php, line 24

Namespace

Drupal\Core\Render\Element
View source
class File extends FormElement {
  
  /**
   * {@inheritdoc}
   */
  public function getInfo() {
    $class = static::class;
    return [
      '#input' => TRUE,
      '#multiple' => FALSE,
      '#process' => [
        [
          $class,
          'processFile',
        ],
      ],
      '#size' => 60,
      '#pre_render' => [
        [
          $class,
          'preRenderFile',
        ],
      ],
      '#theme' => 'input__file',
      '#theme_wrappers' => [
        'form_element',
      ],
      '#value_callback' => [
        [
          $class,
          'valueCallback',
        ],
      ],
    ];
  }
  
  /**
   * Processes a file upload element, make use of #multiple if present.
   */
  public static function processFile(&$element, FormStateInterface $form_state, &$complete_form) {
    if ($element['#multiple']) {
      $element['#attributes']['multiple'] = 'multiple';
      $element['#name'] .= '[]';
    }
    return $element;
  }
  
  /**
   * Prepares a #type 'file' render element for input.html.twig.
   *
   * For assistance with handling the uploaded file correctly, see the API
   * provided by file.inc.
   *
   * @param array $element
   *   An associative array containing the properties of the element.
   *   Properties used: #title, #name, #size, #description, #required,
   *   #attributes.
   *
   * @return array
   *   The $element with prepared variables ready for input.html.twig.
   */
  public static function preRenderFile($element) {
    $element['#attributes']['type'] = 'file';
    Element::setAttributes($element, [
      'id',
      'name',
      'size',
    ]);
    static::setAttributes($element, [
      'js-form-file',
      'form-file',
    ]);
    return $element;
  }
  
  /**
   * {@inheritdoc}
   */
  public static function valueCallback(&$element, $input, FormStateInterface $form_state) {
    if ($input === FALSE) {
      return NULL;
    }
    $parents = $element['#parents'];
    $element_name = array_shift($parents);
    $uploaded_files = \Drupal::request()->files
      ->get('files', []);
    $uploaded_file = $uploaded_files[$element_name] ?? NULL;
    if ($uploaded_file) {
      // Cast this to an array so that the structure is consistent regardless of
      // whether #value is set or not.
      return (array) $uploaded_file;
    }
    return NULL;
  }

}

Members

Title Sort descending 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
File::getInfo public function Returns the element properties for this element. Overrides ElementInterface::getInfo
File::preRenderFile public static function Prepares a #type 'file' render element for input.html.twig.
File::processFile public static function Processes a file upload element, make use of #multiple if present.
File::valueCallback public static function Determines how user input is mapped to an element's #value property. Overrides FormElement::valueCallback
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.
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.

Buggy or inaccurate documentation? Please file an issue. Need support? Need help programming? Connect with the Drupal community.