Classes, traits, and interfaces - main - drupal

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 1529

Name	Deprecated	Object type	Namespace	File name	Summary	Direct uses	Use statements	Strings
VariableMultiRow		class	Drupal\migrate_drupal\Plugin\migrate\source	core/modules/migrate_drupal/src/Plugin/migrate/source/VariableMultiRow.php	Drupal 6/7 multiple variables source from database.	1	2
VariableMultiRowTest		class	Drupal\Tests\migrate_drupal\Kernel\Plugin\migrate\source	core/modules/migrate_drupal/tests/src/Kernel/Plugin/migrate/source/VariableMultiRowTest.php	Tests the variable multirow source plugin.
VariableTest		class	Drupal\Tests\migrate_drupal\Kernel\Plugin\migrate\source	core/modules/migrate_drupal/tests/src/Kernel/Plugin/migrate/source/VariableTest.php	Tests the variable source plugin.
VariableTest		class	Drupal\Tests\Component\Utility	core/tests/Drupal/Tests/Component/Utility/VariableTest.php	Test variable export functionality in Variable component.
VariableTestMock		class	Drupal\Tests\Component\Utility	core/tests/Drupal/Tests/Component/Utility/VariableTest.php	A class for testing Variable::callableToString().
VariableTranslation		class	Drupal\migrate_drupal\Plugin\migrate\source\d6	core/modules/migrate_drupal/src/Plugin/migrate/source/d6/VariableTranslation.php	Drupal 6 i18n_variable source from database.		1
VariableTranslation		class	Drupal\migrate_drupal\Plugin\migrate\source\d7	core/modules/migrate_drupal/src/Plugin/migrate/source/d7/VariableTranslation.php	Drupal 7 variable_store source from database.		1
VariableTranslationCheckRequirementsTest		class	Drupal\Tests\migrate_drupal\Kernel\d6	core/modules/migrate_drupal/tests/src/Kernel/d6/VariableTranslationCheckRequirementsTest.php	Tests check requirements for variable translation source plugin.
VariableTranslationTest		class	Drupal\Tests\migrate_drupal\Kernel\Plugin\migrate\source\d6	core/modules/migrate_drupal/tests/src/Kernel/Plugin/migrate/source/d6/VariableTranslationTest.php	Tests the variable source plugin.
VariableTranslationTest		class	Drupal\Tests\migrate_drupal\Kernel\Plugin\migrate\source\d7	core/modules/migrate_drupal/tests/src/Kernel/Plugin/migrate/source/d7/VariableTranslationTest.php	Tests the variable source plugin.
VariantBase		abstract class	Drupal\Core\Display	core/lib/Drupal/Core/Display/VariantBase.php	Provides a base class for DisplayVariant plugins.	4	4
VariantInterface		interface	Drupal\Core\Display	core/lib/Drupal/Core/Display/VariantInterface.php	Provides an interface for DisplayVariant plugins.	3
VariantManager		class	Drupal\Core\Display	core/lib/Drupal/Core/Display/VariantManager.php	Manages discovery of display variant plugins.			2
VariationCache		class	Drupal\Core\Cache	core/lib/Drupal/Core/Cache/VariationCache.php	Wraps a regular cache backend to make it support cache contexts.		3
VariationCacheFactory		class	Drupal\Core\Cache	core/lib/Drupal/Core/Cache/VariationCacheFactory.php	Defines the variation cache factory.			2
VariationCacheFactoryInterface		interface	Drupal\Core\Cache	core/lib/Drupal/Core/Cache/VariationCacheFactoryInterface.php	An interface defining variation cache factory classes.	1	3
VariationCacheInterface		interface	Drupal\Core\Cache	core/lib/Drupal/Core/Cache/VariationCacheInterface.php	Defines an interface for variation cache implementations.	1	5	7
VariationCacheTest		class	Drupal\Tests\Core\Cache	core/tests/Drupal/Tests/Core/Cache/VariationCacheTest.php	Tests Drupal\Core\Cache\VariationCache.
VegetableInterface		interface	Drupal\Tests\Component\Plugin\Fixtures\vegetable	core/tests/Drupal/Tests/Component/Plugin/Fixtures/vegetable/VegetableInterface.php	Provides an interface for test plugins.	1	1
VendorHardeningExcluder		final class	Drupal\package_manager\PathExcluder	core/modules/package_manager/src/PathExcluder/VendorHardeningExcluder.php	Excludes vendor hardening files from stage operations.		1
VendorHardeningExcluderTest		class	Drupal\Tests\package_manager\Kernel\PathExcluder	core/modules/package_manager/tests/src/Kernel/PathExcluder/VendorHardeningExcluderTest.php	Tests Vendor Hardening Excluder.
VendorHardeningPlugin		class	Drupal\Composer\Plugin\VendorHardening	composer/Plugin/VendorHardening/VendorHardeningPlugin.php	A Composer plugin to clean out your project's vendor directory.		1
VendorHardeningPluginTest		class	Drupal\Tests\Composer\Plugin\VendorHardening	core/tests/Drupal/Tests/Composer/Plugin/VendorHardening/VendorHardeningPluginTest.php	Tests Drupal\Composer\Plugin\VendorHardening\VendorHardeningPlugin.
Version		final class	Drupal\Tests\Component\Annotation\Doctrine\Fixtures\Annotation	core/tests/Drupal/Tests/Component/Annotation/Doctrine/Fixtures/Annotation/Version.php	Plugin annotation @Target("PROPERTY");
VersionById		class	Drupal\jsonapi\Revisions	core/modules/jsonapi/src/Revisions/VersionById.php	Defines a revision ID implementation for entity revision ID values.		1	2
VersionByRel		class	Drupal\jsonapi\Revisions	core/modules/jsonapi/src/Revisions/VersionByRel.php	Revision ID implementation for the default or latest revisions.		2	2
VersionHistoryController		class	Drupal\Core\Entity\Controller	core/lib/Drupal/Core/Entity/Controller/VersionHistoryController.php	Provides a controller showing revision history for an entity.		6
VersionHistoryLocalTasks		class	Drupal\Core\Entity\Plugin\Derivative	core/lib/Drupal/Core/Entity/Plugin/Derivative/VersionHistoryLocalTasks.php	Provides version history local tasks for revisionable entities.			1
VersionNegotiator		class	Drupal\jsonapi\Revisions	core/modules/jsonapi/src/Revisions/VersionNegotiator.php	Provides a version negotiator manager.		1	2
VersionNegotiatorInterface		interface	Drupal\jsonapi\Revisions	core/modules/jsonapi/src/Revisions/VersionNegotiatorInterface.php	Defines the common interface for all version negotiators.	2
VersionNegotiatorTest		class	Drupal\Tests\jsonapi\Kernel\Revisions	core/modules/jsonapi/tests/src/Kernel/Revisions/VersionNegotiatorTest.php	The test class for version negotiators.
VersionNotFoundException		class	Drupal\jsonapi\Revisions	core/modules/jsonapi/src/Revisions/VersionNotFoundException.php	Used when a version ID is valid, but the requested version does not exist.
VersionTest		class	Drupal\Tests\ckeditor5\Unit	core/modules/ckeditor5/tests/src/Unit/VersionTest.php	Test the CKEditor version.
VerticalTabs		class	Drupal\Core\Render\Element	core/lib/Drupal/Core/Render/Element/VerticalTabs.php	Provides a render element for vertical tabs in a form.
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\Entity	core/modules/views/src/Entity/View.php	Defines a View configuration entity class.		76
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.		1
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.		2
ViewAjaxControllerTest		class	Drupal\Tests\views\Unit\Controller	core/modules/views/tests/src/Unit/Controller/ViewAjaxControllerTest.php	Tests Drupal\views\Controller\ViewAjaxController.
ViewAjaxResponse		class	Drupal\views\Ajax	core/modules/views/src/Ajax/ViewAjaxResponse.php	Custom JSON response object for an ajax view response.		2
ViewAjaxTest		class	Drupal\Tests\views\Functional	core/modules/views/tests/src/Functional/ViewAjaxTest.php	Tests the ajax view functionality.
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.
ViewEditTest		class	Drupal\Tests\views_ui\Functional	core/modules/views_ui/tests/src/Functional/ViewEditTest.php	Tests some general functionality of editing views, like deleting a view.
ViewElementTest		class	Drupal\Tests\views\Kernel	core/modules/views/tests/src/Kernel/ViewElementTest.php	Tests the view render element.
ViewElementTest		class	Drupal\Tests\views\Functional	core/modules/views/tests/src/Functional/ViewElementTest.php	Tests the view render element.
ViewEntityDependenciesTest		class	Drupal\Tests\views\Kernel\Entity	core/modules/views/tests/src/Kernel/Entity/ViewEntityDependenciesTest.php	Tests the calculation of dependencies for views.

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