Classes, traits, and interfaces - Drupal 11.1.x - Drupal Core

Introduction to classes

A lot of the PHP code in Drupal is object oriented (OO), making use of PHP classes, interfaces, and traits. See the Objected-oriented programming conventions for more information.

See also

Objected-oriented programming conventions

File

core/core.api.php, line 1518

Name	Deprecated	Object type	Namespace	File name	Summary	Direct uses	Use statements	Strings
vfsStream		class	org\bovigo\vfs	vendor/mikey179/vfsstream/src/main/php/org/bovigo/vfs/vfsStream.php	Some utility methods for vfsStream.
vfsStreamAbstractContent		abstract class	org\bovigo\vfs	vendor/mikey179/vfsstream/src/main/php/org/bovigo/vfs/vfsStreamAbstractContent.php	Base stream contents container.	2
vfsStreamAbstractVisitor		abstract class	org\bovigo\vfs\visitor	vendor/mikey179/vfsstream/src/main/php/org/bovigo/vfs/visitor/vfsStreamAbstractVisitor.php	Abstract base class providing an implementation for the visit() method.	2
vfsStreamBlock		class	org\bovigo\vfs	vendor/mikey179/vfsstream/src/main/php/org/bovigo/vfs/vfsStreamBlock.php	Block container.		4
vfsStreamContainer		interface	org\bovigo\vfs	vendor/mikey179/vfsstream/src/main/php/org/bovigo/vfs/vfsStreamContainer.php	Interface for stream contents that are able to store other stream contents.	1
vfsStreamContainerIterator		class	org\bovigo\vfs	vendor/mikey179/vfsstream/src/main/php/org/bovigo/vfs/vfsStreamContainerIterator.php	Iterator for children of a directory container.
vfsStreamContent		interface	org\bovigo\vfs	vendor/mikey179/vfsstream/src/main/php/org/bovigo/vfs/vfsStreamContent.php	Interface for stream contents.	1	3
vfsStreamDirectory		class	org\bovigo\vfs	vendor/mikey179/vfsstream/src/main/php/org/bovigo/vfs/vfsStreamDirectory.php	Directory container.	1	3
vfsStreamException		class	org\bovigo\vfs	vendor/mikey179/vfsstream/src/main/php/org/bovigo/vfs/vfsStreamException.php	Exception for vfsStream errors.
vfsStreamFile		class	org\bovigo\vfs	vendor/mikey179/vfsstream/src/main/php/org/bovigo/vfs/vfsStreamFile.php	File container.	1	3
vfsStreamPrintVisitor		class	org\bovigo\vfs\visitor	vendor/mikey179/vfsstream/src/main/php/org/bovigo/vfs/visitor/vfsStreamPrintVisitor.php	Visitor which traverses a content structure recursively to print it to an output stream.
vfsStreamStructureVisitor		class	org\bovigo\vfs\visitor	vendor/mikey179/vfsstream/src/main/php/org/bovigo/vfs/visitor/vfsStreamStructureVisitor.php	Visitor which traverses a content structure recursively to create an array structure from it.
vfsStreamVisitor		interface	org\bovigo\vfs\visitor	vendor/mikey179/vfsstream/src/main/php/org/bovigo/vfs/visitor/vfsStreamVisitor.php	Interface for a visitor to work on a vfsStream content structure.	1	1
vfsStreamWrapper		class	org\bovigo\vfs	vendor/mikey179/vfsstream/src/main/php/org/bovigo/vfs/vfsStreamWrapper.php	Stream wrapper to mock file system requests.
VgmcpInstaller		class	Composer\Installers	vendor/composer/installers/src/Composer/Installers/VgmcpInstaller.php
Vid		class	Drupal\node\Plugin\views\argument	core/modules/node/src/Plugin/views/argument/Vid.php	Argument handler to accept a node revision id.
VideoFile		class	Drupal\media\Plugin\media\Source	core/modules/media/src/Plugin/media/Source/VideoFile.php	Media source wrapping around a video file.
View		class	Drupal\views\Element	core/modules/views/src/Element/View.php	Provides a render element to display a view.		1
View		class	Drupal\views\Plugin\views\area	core/modules/views/src/Plugin/views/area/View.php	Views area handlers. Insert a view inside of an area.
View		class	Drupal\views\Entity	core/modules/views/src/Entity/View.php	Defines a View configuration entity class.		6
ViewAddForm		class	Drupal\views_ui	core/modules/views_ui/src/ViewAddForm.php	Form controller for the Views add form.
ViewAjaxController		class	Drupal\views\Controller	core/modules/views/src/Controller/ViewAjaxController.php	Defines a controller to load a view via AJAX.		1
ViewAjaxResponse		class	Drupal\views\Ajax	core/modules/views/src/Ajax/ViewAjaxResponse.php	Custom JSON response object for an ajax view response.		1
ViewDuplicateForm		class	Drupal\views_ui	core/modules/views_ui/src/ViewDuplicateForm.php	Form controller for the Views duplicate form.
ViewEditForm		class	Drupal\views_ui	core/modules/views_ui/src/ViewEditForm.php	Form controller for the Views edit form.
ViewEntityInterface		interface	Drupal\views	core/modules/views/src/ViewEntityInterface.php	Defines an interface for View storage classes.	2	14
ViewEvent		final class	Symfony\Component\HttpKernel\Event	vendor/symfony/http-kernel/Event/ViewEvent.php	Allows to create a response for the return value of a controller.		7
ViewExecutable		class	Drupal\views	core/modules/views/src/ViewExecutable.php	Represents a view as a whole.		83
ViewExecutableFactory		class	Drupal\views	core/modules/views/src/ViewExecutableFactory.php	Defines the cache backend factory.		4	2
ViewFormBase		abstract class	Drupal\views_ui	core/modules/views_ui/src/ViewFormBase.php	Base form for Views forms.	4
ViewListBuilder		class	Drupal\views_ui	core/modules/views_ui/src/ViewListBuilder.php	Defines a class to build a listing of view entities.
ViewMode		class	Drupal\field\Plugin\migrate\source\d7	core/modules/field/src/Plugin/migrate/source/d7/ViewMode.php	Drupal 7 view mode source from database.
ViewMode		class	Drupal\node\Plugin\migrate\source\d6	core/modules/node/src/Plugin/migrate/source/d6/ViewMode.php	Drupal 6 view mode source from database.
ViewModeAccessCheck		class	Drupal\field_ui\Access	core/modules/field_ui/src/Access/ViewModeAccessCheck.php	Defines an access check for entity view mode routes.			2
ViewModeBase		abstract class	Drupal\node\Plugin\migrate\source\d6	core/modules/node/src/Plugin/migrate/source/d6/ViewModeBase.php	A base class for migrations that require view mode info.	2	1
ViewPageController		class	Drupal\views\Routing	core/modules/views/src/Routing/ViewPageController.php	Defines a page controller to execute and render a view.
ViewPreviewForm		class	Drupal\views_ui	core/modules/views_ui/src/ViewPreviewForm.php	Form controller for the Views preview form.
ViewProjection		final class	OpenTelemetry\SDK\Metrics	vendor/open-telemetry/sdk/Metrics/ViewProjection.php			3
ViewRegistryInterface		interface	OpenTelemetry\SDK\Metrics	vendor/open-telemetry/sdk/Metrics/ViewRegistryInterface.php		1	1
ViewRenderElementException		class	Drupal\views\Exception	core/modules/views/src/Exception/ViewRenderElementException.php	Defines an exception for an invalid View render element.		1
Views		class	Drupal\views	core/modules/views/src/Views.php	Static service container wrapper for views.		41
ViewsAccess		class	Drupal\views\Annotation	core/modules/views/src/Annotation/ViewsAccess.php	Defines a Plugin annotation object for views access plugins.
ViewsAccess		class	Drupal\views\Attribute	core/modules/views/src/Attribute/ViewsAccess.php	Defines a views access plugins type attribute for plugin discovery.		3
ViewsArea		class	Drupal\views\Annotation	core/modules/views/src/Annotation/ViewsArea.php	Defines a Plugin annotation object for views area handlers.
ViewsArea		class	Drupal\views\Attribute	core/modules/views/src/Attribute/ViewsArea.php	Defines a Plugin attribute object for views area handlers.		12
ViewsArgument		class	Drupal\views\Annotation	core/modules/views/src/Annotation/ViewsArgument.php	Defines a Plugin annotation object for views argument handlers.
ViewsArgument		class	Drupal\views\Attribute	core/modules/views/src/Attribute/ViewsArgument.php	Defines a ViewsArgument attribute for plugin discovery.		41
ViewsArgumentDefault		class	Drupal\views\Annotation	core/modules/views/src/Annotation/ViewsArgumentDefault.php	Defines a Plugin annotation object for views argument default plugins.
ViewsArgumentDefault		class	Drupal\views\Attribute	core/modules/views/src/Attribute/ViewsArgumentDefault.php	Defines a ViewsArgument attribute for plugin discovery.		7
ViewsArgumentValidator		class	Drupal\views\Annotation	core/modules/views/src/Annotation/ViewsArgumentValidator.php	Defines a Plugin annotation object for views argument validator plugins.