Classes, traits, and interfaces - 10.3.x - 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 1518

Name	Deprecated	Object type	Namespace	File name	Summary	Direct uses	Use statements	Strings
DbUpdateAccessCheck		class	Drupal\system\Access	core/modules/system/src/Access/DbUpdateAccessCheck.php	Access check for database update routes.			2
DbUpdateController		class	Drupal\system\Controller	core/modules/system/src/Controller/DbUpdateController.php	Controller routines for database update routes.
DbUpdateNegotiator		class	Drupal\system\Theme	core/modules/system/src/Theme/DbUpdateNegotiator.php	Sets the active theme for the database update pages.			2
DCOM58Test		class	Drupal\Tests\Component\Annotation\Doctrine\Ticket	core/tests/Drupal/Tests/Component/Annotation/Doctrine/Ticket/DCOM58Test.php	This class is a near-copy of \Doctrine\Tests\Common\Annotations\Ticket\DCOM58Test, which is part of the Doctrine project: <http://www.doctrine-project.org>. It was copied from version 1.2.7.
DebugExtension		final class	Drupal\Core\Template	core/lib/Drupal/Core/Template/DebugExtension.php	A class providing Drupal Twig Debug extension.			2
DecimalData		class	Drupal\Core\TypedData\Plugin\DataType	core/lib/Drupal/Core/TypedData/Plugin/DataType/DecimalData.php	The decimal data type.
DecimalFormatter		class	Drupal\Core\Field\Plugin\Field\FieldFormatter	core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/DecimalFormatter.php	Plugin implementation of the 'number_decimal' formatter.
DecimalInterface		interface	Drupal\Core\TypedData\Type	core/lib/Drupal/Core/TypedData/Type/DecimalInterface.php	Interface for decimal numbers.	1	3
DecimalItem		class	Drupal\Core\Field\Plugin\Field\FieldType	core/lib/Drupal/Core/Field/Plugin/Field/FieldType/DecimalItem.php	Defines the 'decimal' field type.
DecoratedServiceTest		class	Drupal\Tests\system\Kernel	core/modules/system/tests/src/Kernel/DecoratedServiceTest.php	Test handling of decorated services in DependencySerializationTraitPass.
DefaultAccessCheck		class	Drupal\Core\Access	core/lib/Drupal/Core/Access/DefaultAccessCheck.php	Allows access to routes to be controlled by an '_access' boolean parameter.		2	2
DefaultAccessCheckTest		class	Drupal\Tests\Core\Access	core/tests/Drupal/Tests/Core/Access/DefaultAccessCheckTest.php	@coversDefaultClass \Drupal\Core\Access\DefaultAccessCheck[[api-linebreak]] @group Access
DefaultConfigTest		class	Drupal\Tests\Core\Extension	core/tests/Drupal/Tests/Core/Extension/DefaultConfigTest.php	Tests default configuration of the Extension system.
DefaultConfigTest		class	Drupal\KernelTests\Config	core/tests/Drupal/KernelTests/Config/DefaultConfigTest.php	Tests that the installed config matches the default config.
DefaultContentFilesAccessTest		class	Drupal\Tests\demo_umami_content\Functional	core/profiles/demo_umami/modules/demo_umami_content/tests/src/Functional/DefaultContentFilesAccessTest.php	Tests that files provided by demo_umami_content are not accessible.
DefaultDisplay		class	Drupal\views\Plugin\views\display	core/modules/views/src/Plugin/views/display/DefaultDisplay.php	A plugin to handle defaults on a view.		2
DefaultDisplayExtender		class	Drupal\views\Plugin\views\display_extender	core/modules/views/src/Plugin/views/display_extender/DefaultDisplayExtender.php	Default display extender plugin; does nothing.
DefaultExceptionHtmlSubscriber		class	Drupal\Core\EventSubscriber	core/lib/Drupal/Core/EventSubscriber/DefaultExceptionHtmlSubscriber.php	Exception subscriber for handling core default HTML error pages.	1		2
DefaultExceptionSubscriber		class	Drupal\serialization\EventSubscriber	core/modules/serialization/src/EventSubscriber/DefaultExceptionSubscriber.php	Handles default error responses in serialization formats.	1	2	2
DefaultExceptionSubscriber		class	Drupal\jsonapi\EventSubscriber	core/modules/jsonapi/src/EventSubscriber/DefaultExceptionSubscriber.php	Serializes exceptions in compliance with the JSON:API specification.			2
DefaultExceptionSubscriberTest		class	Drupal\Tests\serialization\Unit\EventSubscriber	core/modules/serialization/tests/src/Unit/EventSubscriber/DefaultExceptionSubscriberTest.php	@coversDefaultClass \Drupal\serialization\EventSubscriber\DefaultExceptionSubscriber[[api-linebreak]] @group serialization
DefaultFactory		class	Drupal\Component\Plugin\Factory	core/lib/Drupal/Component/Plugin/Factory/DefaultFactory.php	Default plugin factory.	2	14
DefaultFactoryTest		class	Drupal\Tests\Component\Plugin	core/tests/Drupal/Tests/Component/Plugin/DefaultFactoryTest.php	@coversDefaultClass \Drupal\Component\Plugin\Factory\DefaultFactory[[api-linebreak]] @group Plugin
DefaultFileFormatter		class	Drupal\file\Plugin\Field\FieldFormatter	core/modules/file/src/Plugin/Field/FieldFormatter/DefaultFileFormatter.php	Formatter for a text field on a file entity that links the field to the file.
DefaultFormatTest		class	Drupal\FunctionalTests\Routing	core/tests/Drupal/FunctionalTests/Routing/DefaultFormatTest.php	@group routing
DefaultFormatTestController		class	Drupal\default_format_test	core/modules/system/tests/modules/default_format_test/src/DefaultFormatTestController.php
DefaultHtmlRouteProvider		class	Drupal\Core\Entity\Routing	core/lib/Drupal/Core/Entity/Routing/DefaultHtmlRouteProvider.php	Provides HTML routes for entities.	2	1
DefaultHtmlRouteProviderTest		class	Drupal\Tests\Core\Entity\Routing	core/tests/Drupal/Tests/Core/Entity/Routing/DefaultHtmlRouteProviderTest.php	@coversDefaultClass \Drupal\Core\Entity\Routing\DefaultHtmlRouteProvider[[api-linebreak]] @group Entity
DefaultLangcode		class	Drupal\language\Plugin\migrate\destination	core/modules/language/src/Plugin/migrate/destination/DefaultLangcode.php	Provides a destination plugin for the default langcode config.
DefaultLanguageItem		class	Drupal\language	core/modules/language/src/DefaultLanguageItem.php	Alternative plugin implementation of the 'language' field type.
DefaultLanguageRenderer		class	Drupal\views\Entity\Render	core/modules/views/src/Entity/Render/DefaultLanguageRenderer.php	Renders entities in their default language.
DefaultLazyPluginCollection		class	Drupal\Core\Plugin	core/lib/Drupal/Core/Plugin/DefaultLazyPluginCollection.php	Provides a default plugin collection for a plugin type.	6	9
DefaultLazyPluginCollectionTest		class	Drupal\Tests\Core\Plugin	core/tests/Drupal/Tests/Core/Plugin/DefaultLazyPluginCollectionTest.php	@coversDefaultClass \Drupal\Core\Plugin\DefaultLazyPluginCollection[[api-linebreak]] @group Plugin
DefaultMenuLinkTreeManipulators		class	Drupal\Core\Menu	core/lib/Drupal/Core/Menu/DefaultMenuLinkTreeManipulators.php	Provides a couple of menu link tree manipulators.		1	2
DefaultMenuLinkTreeManipulatorsTest		class	Drupal\Tests\Core\Menu	core/tests/Drupal/Tests/Core/Menu/DefaultMenuLinkTreeManipulatorsTest.php	Tests the default menu link tree manipulators.
DefaultMetatagsTest		class	Drupal\Tests\system\Functional\Page	core/modules/system/tests/src/Functional/Page/DefaultMetatagsTest.php	Tests default HTML metatags on a page.
DefaultMobileMetaTagsTest		class	Drupal\Tests\system\Functional\System	core/modules/system/tests/src/Functional/System/DefaultMobileMetaTagsTest.php	Confirm that the default mobile meta tags appear as expected.
DefaultModerationStateTest		class	Drupal\Tests\content_moderation\Functional	core/modules/content_moderation/tests/src/Functional/DefaultModerationStateTest.php	Tests setting a custom default moderation state.
DefaultNegotiator		class	Drupal\Core\Theme	core/lib/Drupal/Core/Theme/DefaultNegotiator.php	Determines the default theme of the site.			2
DefaultPasswordGenerator		class	Drupal\Core\Password	core/lib/Drupal/Core/Password/DefaultPasswordGenerator.php	Provides a default password generator.		1	2
DefaultPasswordGeneratorTest		class	Drupal\Tests\Core\Password	core/tests/Drupal/Tests/Core/Password/DefaultPasswordGeneratorTest.php	Unit tests for password generator.
DefaultPluginManager		class	Drupal\Core\Plugin	core/lib/Drupal/Core/Plugin/DefaultPluginManager.php	Base class for plugin managers.	50	51
DefaultPluginManagerTest		class	Drupal\Tests\Core\Plugin	core/tests/Drupal/Tests/Core/Plugin/DefaultPluginManagerTest.php	Tests the DefaultPluginManager.
DefaultPluginManagerTest		class	Drupal\KernelTests\Core\Plugin	core/tests/Drupal/KernelTests/Core/Plugin/DefaultPluginManagerTest.php	Tests the default plugin manager.
DefaultRequestPolicy		class	Drupal\Core\PageCache	core/lib/Drupal/Core/PageCache/DefaultRequestPolicy.php	The default page cache request policy.			2
DefaultRequestPolicy		class	Drupal\dynamic_page_cache\PageCache\RequestPolicy	core/modules/dynamic_page_cache/src/PageCache/RequestPolicy/DefaultRequestPolicy.php	The default Dynamic Page Cache request policy.			2
DefaultRevisionStateTest		class	Drupal\Tests\content_moderation\Kernel	core/modules/content_moderation/tests/src/Kernel/DefaultRevisionStateTest.php	Tests the correct default revision is set.
DefaultSelection		class	Drupal\Core\Entity\Plugin\EntityReferenceSelection	core/lib/Drupal/Core/Entity/Plugin/EntityReferenceSelection/DefaultSelection.php	Default plugin implementation of the Entity Reference Selection plugin.	10	9
DefaultSelectionDeriver		class	Drupal\Core\Entity\Plugin\Derivative	core/lib/Drupal/Core/Entity/Plugin/Derivative/DefaultSelectionDeriver.php	Provides derivative plugins for the DefaultSelection plugin.		1
DefaultsEntityForm		class	Drupal\layout_builder\Form	core/modules/layout_builder/src/Form/DefaultsEntityForm.php	Provides a form containing the Layout Builder UI for defaults.		1

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