Classes, traits, and interfaces - 8.9.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 1511

Name	Deprecated	Object type	Namespace	File name	Summary	Direct uses	Use statements	Strings
EndOfTransactionQueriesTest		class	Drupal\KernelTests\Core\Cache	core/tests/Drupal/KernelTests/Core/Cache/EndOfTransactionQueriesTest.php	Tests that cache tag invalidation queries are delayed to the end of transactions.
Endpoint		class	Drupal\media\OEmbed	core/modules/media/src/OEmbed/Endpoint.php	Value object for oEmbed provider endpoints.
EnforcedFormResponseSubscriber		class	Drupal\Core\EventSubscriber	core/lib/Drupal/Core/EventSubscriber/EnforcedFormResponseSubscriber.php	Handle the EnforcedResponseException and deliver an EnforcedResponse.			2
EnforcedResponse		class	Drupal\Core\Form	core/lib/Drupal/Core/Form/EnforcedResponse.php	A wrapper containing a response which is to be enforced upon delivery.		1
EnforcedResponseException		class	Drupal\Core\Form	core/lib/Drupal/Core/Form/EnforcedResponseException.php	Custom exception to break out of the main request and enforce a response.		6
EngineNyanCatTest		class	Drupal\Tests\system\Functional\Theme	core/modules/system/tests/src/Functional/Theme/EngineNyanCatTest.php	Tests the multi theme engine support.
EngineTwigTest		class	Drupal\Tests\system\Functional\Theme	core/modules/system/tests/src/Functional/Theme/EngineTwigTest.php	Tests Twig-specific theme functionality.
EnhancerInterface		interface	Drupal\Core\Routing	core/lib/Drupal/Core/Routing/EnhancerInterface.php	A route enhance service to determine route enhance rules.	8	8
Entity		class	Drupal\Tests\Component\Annotation\Doctrine\Ticket	core/tests/Drupal/Tests/Component/Annotation/Doctrine/Ticket/DCOM58Test.php
Entity		class		core/tests/Drupal/Tests/Component/Annotation/Doctrine/Ticket/DCOM58Entity.php	This class is a near-copy of tests/Doctrine/Tests/Common/Annotations/Ticket/DCOM58Entity.php, which is part of the Doctrine project: <http://www.doctrine-project.org>. It was copied from version 1.2.7.
Entity	in drupal:8.7.0 and is removed from drupal:9.0.0. Use \Drupal\Core\Entity\EntityBase instead.	abstract class	Drupal\Core\Entity	core/lib/Drupal/Core/Entity/Entity.php	Defines a base entity class.
Entity		abstract class	Drupal\migrate\Plugin\migrate\destination	core/modules/migrate/src/Plugin/migrate/destination/Entity.php	Provides a generic destination to import entities.	2
Entity		class	Drupal\views\Plugin\views\argument_validator	core/modules/views/src/Plugin/views/argument_validator/Entity.php	Defines a argument validator plugin for each entity type.	3	4
Entity		class	Drupal\views\Plugin\views\area	core/modules/views/src/Plugin/views/area/Entity.php	Provides an area handler which renders an entity in a certain view mode.		1
EntityAccess		class	Drupal\workspaces	core/modules/workspaces/src/EntityAccess.php	Service wrapper for hooks relating to entity access control.		1
EntityAccessCheck		class	Drupal\Core\Entity	core/lib/Drupal/Core/Entity/EntityAccessCheck.php	Provides a generic access checker for entities.		1	2
EntityAccessChecker		class	Drupal\jsonapi\Access	core/modules/jsonapi/src/Access/EntityAccessChecker.php	Checks access to entities.		2	2
EntityAccessCheckTest		class	Drupal\Tests\Core\Entity	core/tests/Drupal/Tests/Core/Entity/EntityAccessCheckTest.php	Unit test of entity access checking system.
EntityAccessControlHandler		class	Drupal\Core\Entity	core/lib/Drupal/Core/Entity/EntityAccessControlHandler.php	Defines a default implementation for entity access control handler.	35	36
EntityAccessControlHandlerInterface		interface	Drupal\Core\Entity	core/lib/Drupal/Core/Entity/EntityAccessControlHandlerInterface.php	Defines an interface for entity access control handlers.	2	3
EntityAccessControlHandlerTest		class	Drupal\KernelTests\Core\Entity	core/tests/Drupal/KernelTests/Core/Entity/EntityAccessControlHandlerTest.php	Tests the entity access control handler.
EntityAccessDeniedHttpException		class	Drupal\jsonapi\Exception	core/modules/jsonapi/src/Exception/EntityAccessDeniedHttpException.php	Enhances the access denied exception with information about the entity.		8
EntityAccessDeniedHttpExceptionNormalizer		class	Drupal\jsonapi\Normalizer	core/modules/jsonapi/src/Normalizer/EntityAccessDeniedHttpExceptionNormalizer.php	Normalizes an EntityAccessDeniedException.			2
EntityActionBase		abstract class	Drupal\Core\Action\Plugin\Action	core/lib/Drupal/Core/Action/Plugin/Action/EntityActionBase.php	Base class for entity-based actions.	4
EntityActionDeriverBase		abstract class	Drupal\Core\Action\Plugin\Action\Derivative	core/lib/Drupal/Core/Action/Plugin/Action/Derivative/EntityActionDeriverBase.php	Provides a base action for each entity type with specific interfaces.	3
EntityAdapter		class	Drupal\Core\Entity\Plugin\DataType	core/lib/Drupal/Core/Entity/Plugin/DataType/EntityAdapter.php	Defines the "entity" data type.	1	6
EntityAdapterUnitTest		class	Drupal\Tests\Core\Entity\TypedData	core/tests/Drupal/Tests/Core/Entity/TypedData/EntityAdapterUnitTest.php	@coversDefaultClass \Drupal\Core\Entity\Plugin\DataType\EntityAdapter @group Entity @group TypedData
EntityAddUITest		class	Drupal\Tests\system\Functional\Entity	core/modules/system/tests/src/Functional/Entity/EntityAddUITest.php	Tests the /add and /add/{type} controllers.
EntityApiTest		class	Drupal\KernelTests\Core\Entity	core/tests/Drupal/KernelTests/Core/Entity/EntityApiTest.php	Tests basic CRUD functionality.
EntityAutocomplete		class	Drupal\Core\Entity\Element	core/lib/Drupal/Core/Entity/Element/EntityAutocomplete.php	Provides an entity autocomplete form element.		4
EntityAutocompleteController		class	Drupal\system\Controller	core/modules/system/src/Controller/EntityAutocompleteController.php	Defines a route controller for entity autocomplete form elements.		1
EntityAutocompleteElementFormTest		class	Drupal\KernelTests\Core\Entity\Element	core/tests/Drupal/KernelTests/Core/Entity/Element/EntityAutocompleteElementFormTest.php	Tests the EntityAutocomplete Form API element.
EntityAutocompleteMatcher		class	Drupal\Core\Entity	core/lib/Drupal/Core/Entity/EntityAutocompleteMatcher.php	Matcher class to get autocompletion results for entity reference.			2
EntityAutocompleteMatcherInterface		interface	Drupal\Core\Entity	core/lib/Drupal/Core/Entity/EntityAutocompleteMatcherInterface.php		1	1
EntityAutocompleteTest		class	Drupal\KernelTests\Core\Entity	core/tests/Drupal/KernelTests/Core/Entity/EntityAutocompleteTest.php	Tests the autocomplete functionality.
EntityBase		abstract class	Drupal\Core\Entity	core/lib/Drupal/Core/Entity/EntityBase.php	Defines a base entity class.	6	4
EntityBaseFieldOverride		class	Drupal\migrate\Plugin\migrate\destination	core/modules/migrate/src/Plugin/migrate/destination/EntityBaseFieldOverride.php	Provides entity base field override destination plugin.
EntityBlock		class	Drupal\block\Plugin\migrate\destination	core/modules/block/src/Plugin/migrate/destination/EntityBlock.php	Plugin annotation @MigrateDestination( id = "entity:block" )
EntityBundleAccessCheck		class	Drupal\Core\Entity	core/lib/Drupal/Core/Entity/EntityBundleAccessCheck.php	Provides an entity bundle checker for the _entity_bundles route requirement.		1	2
EntityBundleAccessCheckTest		class	Drupal\Tests\Core\Entity	core/tests/Drupal/Tests/Core/Entity/EntityBundleAccessCheckTest.php	Unit test of entity access checking system.
EntityBundleFieldTest		class	Drupal\KernelTests\Core\Entity	core/tests/Drupal/KernelTests/Core/Entity/EntityBundleFieldTest.php	Tests adding a custom bundle field.
EntityBundleListCacheTest		class	Drupal\FunctionalTests\Entity	core/tests/Drupal/FunctionalTests/Entity/EntityBundleListCacheTest.php	Tests that bundle tags are invalidated when entities change.
EntityBundleListener		class	Drupal\Core\Entity	core/lib/Drupal/Core/Entity/EntityBundleListener.php	Reacts to entity bundle CRUD on behalf of the Entity system.			2
EntityBundleListenerInterface		interface	Drupal\Core\Entity	core/lib/Drupal/Core/Entity/EntityBundleListenerInterface.php	An interface for reacting to entity bundle creation and deletion.	3	1
EntityBundleListenerTest		class	Drupal\KernelTests\Core\Entity	core/tests/Drupal/KernelTests/Core/Entity/EntityBundleListenerTest.php	@coversDefaultClass \Drupal\Core\Entity\EntityBundleListener
EntityCacheTagsTestBase	in drupal:8.?.? and is removed from drupal:9.0.0. Use \Drupal\Tests\system\Functional\Entity\EntityCacheTagsTestBase instead.	abstract class	Drupal\system\Tests\Entity	core/modules/system/src/Tests/Entity/EntityCacheTagsTestBase.php	Provides helper methods for Entity cache tags tests.	1
EntityCacheTagsTestBase		abstract class	Drupal\Tests\system\Functional\Entity	core/modules/system/tests/src/Functional/Entity/EntityCacheTagsTestBase.php	Provides helper methods for Entity cache tags tests.	4	3
EntityChangedActionDeriver		class	Drupal\Core\Action\Plugin\Action\Derivative	core/lib/Drupal/Core/Action/Plugin/Action/Derivative/EntityChangedActionDeriver.php	Provides an action deriver that finds entity types of EntityChangedInterface.		1
EntityChangedConstraint		class	Drupal\Core\Entity\Plugin\Validation\Constraint	core/lib/Drupal/Core/Entity/Plugin/Validation/Constraint/EntityChangedConstraint.php	Validation constraint for the entity changed timestamp.
EntityChangedConstraintValidator		class	Drupal\Core\Entity\Plugin\Validation\Constraint	core/lib/Drupal/Core/Entity/Plugin/Validation/Constraint/EntityChangedConstraintValidator.php	Validates the EntityChanged constraint.

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