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
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.	51	52
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
DefaultSingleLazyPluginCollection		class	Drupal\Core\Plugin	core/lib/Drupal/Core/Plugin/DefaultSingleLazyPluginCollection.php	Provides a default plugin collection for a plugin type.	3	7
DefaultSingleLazyPluginCollectionTest		class	Drupal\Tests\Core\Plugin	core/tests/Drupal/Tests/Core/Plugin/DefaultSingleLazyPluginCollectionTest.php	@coversDefaultClass \Drupal\Core\Plugin\DefaultSingleLazyPluginCollection[[api-linebreak]] @group Plugin
DefaultsSectionStorage		class	Drupal\layout_builder\Plugin\SectionStorage	core/modules/layout_builder/src/Plugin/SectionStorage/DefaultsSectionStorage.php	Defines the 'defaults' section storage type.		2
DefaultsSectionStorageInterface		interface	Drupal\layout_builder	core/modules/layout_builder/src/DefaultsSectionStorageInterface.php	Defines an interface for an object that stores layout sections for defaults.	1	5
DefaultsSectionStorageTest		class	Drupal\Tests\layout_builder\Unit	core/modules/layout_builder/tests/src/Unit/DefaultsSectionStorageTest.php	@coversDefaultClass \Drupal\layout_builder\Plugin\SectionStorage\DefaultsSectionStorage[[api-linebreak]]
DefaultsSectionStorageTest		class	Drupal\Tests\layout_builder\Kernel	core/modules/layout_builder/tests/src/Kernel/DefaultsSectionStorageTest.php	@coversDefaultClass \Drupal\layout_builder\Plugin\SectionStorage\DefaultsSectionStorage[[api-linebreak]]
DefaultsTestPluginManager		class	Drupal\plugin_test\Plugin	core/modules/system/tests/modules/plugin_test/src/Plugin/DefaultsTestPluginManager.php	Defines a plugin manager used by Plugin API unit tests.		1
DefaultStyle		class	Drupal\views\Plugin\views\style	core/modules/views/src/Plugin/views/style/DefaultStyle.php	Unformatted style plugin to render rows.		1
DefaultSummary		class	Drupal\views\Plugin\views\style	core/modules/views/src/Plugin/views/style/DefaultSummary.php	The default style plugin for summaries.	1	1
DefaultTableMapping		class	Drupal\Core\Entity\Sql	core/lib/Drupal/Core/Entity/Sql/DefaultTableMapping.php	Defines a default table mapping class.	2	4
DefaultTableMappingIntegrationTest		class	Drupal\KernelTests\Core\Entity	core/tests/Drupal/KernelTests/Core/Entity/DefaultTableMappingIntegrationTest.php	Tests the default table mapping class for content entities stored in SQL.
DefaultTableMappingTest		class	Drupal\Tests\Core\Entity\Sql	core/tests/Drupal/Tests/Core/Entity/Sql/DefaultTableMappingTest.php	@coversDefaultClass \Drupal\Core\Entity\Sql\DefaultTableMapping[[api-linebreak]] @group Entity
DefaultValue		class	Drupal\migrate\Plugin\migrate\process	core/modules/migrate/src/Plugin/migrate/process/DefaultValue.php	Returns a given default value if the input is empty.		1
DefaultValueTest		class	Drupal\Tests\migrate\Unit\process	core/modules/migrate/tests/src/Unit/process/DefaultValueTest.php	Tests the default_value process plugin.
DefaultValueWidgetTest		class	Drupal\Tests\field_ui\FunctionalJavascript	core/modules/field_ui/tests/src/FunctionalJavascript/DefaultValueWidgetTest.php	Tests the default value widget in Field UI.

Other projects

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