Classes, traits, and interfaces - 9.5.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
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              core/
core.api.php, line 1523  
| Name | Deprecated | Object type | Namespace | File name | Summary | Direct uses | Use statements | Strings | 
|---|---|---|---|---|---|---|---|---|
| EntityFormModeAddForm | class | Drupal\field_ui\Form | core/ | 
                                                                                        Provides the add form for entity display modes. | ||||
| EntityFormModeHalJsonAnonTest | class | Drupal\Tests\hal\Functional\Core | core/ | 
                                                                                        @group hal @group legacy | ||||
| EntityFormModeHalJsonBasicAuthTest | class | Drupal\Tests\hal\Functional\Core | core/ | 
                                                                                        @group hal @group legacy | ||||
| EntityFormModeHalJsonCookieTest | class | Drupal\Tests\hal\Functional\Core | core/ | 
                                                                                        @group hal @group legacy | ||||
| EntityFormModeInterface | interface | Drupal\Core\Entity | core/ | 
                                                                                        Provides an interface defining an entity form mode entity type. | 1 | 2 | ||
| EntityFormModeJsonAnonTest | class | Drupal\FunctionalTests\Rest | core/ | 
                                                                                        @group rest | ||||
| EntityFormModeJsonBasicAuthTest | class | Drupal\FunctionalTests\Rest | core/ | 
                                                                                        @group rest | ||||
| EntityFormModeJsonCookieTest | class | Drupal\FunctionalTests\Rest | core/ | 
                                                                                        @group rest | ||||
| EntityFormModeListBuilder | class | Drupal\field_ui | core/ | 
                                                                                        Defines a class to build a listing of form mode entities. | ||||
| EntityFormModeResourceTestBase | abstract class | Drupal\FunctionalTests\Rest | core/ | 
                                                                                        9 | 3 | |||
| EntityFormModeTest | class | Drupal\Tests\jsonapi\Functional | core/ | 
                                                                                        JSON:API integration test for the "EntityFormMode" config entity type. | ||||
| EntityFormModeXmlAnonTest | class | Drupal\FunctionalTests\Rest | core/ | 
                                                                                        @group rest | ||||
| EntityFormModeXmlBasicAuthTest | class | Drupal\FunctionalTests\Rest | core/ | 
                                                                                        @group rest | ||||
| EntityFormModeXmlCookieTest | class | Drupal\FunctionalTests\Rest | core/ | 
                                                                                        @group rest | ||||
| EntityFormTest | class | Drupal\Tests\Core\Entity | core/ | 
                                                                                        @coversDefaultClass \Drupal\Core\Entity\EntityForm[[api-linebreak]] @group Entity | ||||
| EntityFormTest | class | Drupal\Tests\system\Functional\Entity | core/ | 
                                                                                        Tests the entity form. | ||||
| EntityHandlerBase | abstract class | Drupal\Core\Entity | core/ | 
                                                                                        Provides a base class for entity handlers. | 7 | 1 | ||
| EntityHandlerInterface | interface | Drupal\Core\Entity | core/ | 
                                                                                        Defines an interface for entity handlers. | 16 | 13 | ||
| EntityHasFieldConstraint | class | Drupal\Core\Entity\Plugin\Validation\Constraint | core/ | 
                                                                                        Checks if a value is an entity that has a specific field. | ||||
| EntityHasFieldConstraintValidator | class | Drupal\Core\Entity\Plugin\Validation\Constraint | core/ | 
                                                                                        Validates the EntityHasField constraint. | ||||
| EntityHasFieldConstraintValidatorTest | class | Drupal\KernelTests\Core\Entity | core/ | 
                                                                                        @covers \Drupal\Core\Entity\Plugin\Validation\Constraint\EntityHasFieldConstraintValidator[[api-linebreak]] | ||||
| EntityImageStyle | class | Drupal\image\Plugin\migrate\destination | core/ | 
                                                                                        Entity image style destination. | ||||
| EntityInterface | interface | Drupal\Core\Entity | core/ | 
                                                                                        Defines a common interface for all entity objects. | 11 | 305 | ||
| EntityKernelTestBase | abstract class | Drupal\KernelTests\Core\Entity | core/ | 
                                                                                        Defines an abstract test base for entity kernel tests. | 81 | 41 | ||
| EntityKernelTestBaseTest | class | Drupal\KernelTests\Core\Entity | core/ | 
                                                                                        @covers \Drupal\KernelTests\Core\Entity\EntityKernelTestBase[[api-linebreak]] | ||||
| EntityKeysTest | class | Drupal\KernelTests\Core\Entity | core/ | 
                                                                                        Test the behavior of entity keys. | ||||
| EntityLabel | class | Drupal\views\Plugin\views\field | core/ | 
                                                                                        Field handler to display entity label optionally linked to entity page. | ||||
| EntityLanguageTestBase | abstract class | Drupal\KernelTests\Core\Entity | core/ | 
                                                                                        Base class for language-aware entity tests. | 3 | |||
| EntityLastInstalledSchemaRepository | class | Drupal\Core\Entity | core/ | 
                                                                                        Provides a repository for installed entity definitions. | 2 | |||
| EntityLastInstalledSchemaRepositoryInterface | interface | Drupal\Core\Entity | core/ | 
                                                                                        Provides an interface for an installed entity definition repository. | 1 | 7 | ||
| EntityLink | class | Drupal\views\Plugin\views\field | core/ | 
                                                                                        Field handler to present a link to an entity. | 3 | 1 | ||
| EntityLink | class | Drupal\comment\Plugin\views\field | core/ | 
                                                                                        Handler for showing comment module's entity links. | ||||
| EntityLinkDelete | class | Drupal\views\Plugin\views\field | core/ | 
                                                                                        Field handler to present a link to delete an entity. | ||||
| EntityLinkEdit | class | Drupal\views\Plugin\views\field | core/ | 
                                                                                        Field handler to present a link to edit an entity. | ||||
| EntityLinkTest | class | Drupal\Tests\Core\Entity | core/ | 
                                                                                        @coversDefaultClass \Drupal\Core\Entity\EntityBase[[api-linebreak]] @group Entity | ||||
| EntityListBuilder | class | Drupal\Core\Entity | core/ | 
                                                                                        Defines a generic implementation to build a listing of entities. | 8 | 10 | ||
| EntityListBuilderInterface | interface | Drupal\Core\Entity | core/ | 
                                                                                        Defines an interface to build entity listings. | 2 | 1 | ||
| EntityListBuilderTest | class | Drupal\Tests\Core\Entity | core/ | 
                                                                                        @coversDefaultClass \Drupal\Core\Entity\EntityListBuilder[[api-linebreak]] @group Entity | ||||
| EntityListBuilderTest | class | Drupal\Tests\system\Functional\Entity | core/ | 
                                                                                        Tests entity list builder functionality. | ||||
| EntityListController | class | Drupal\Core\Entity\Controller | core/ | 
                                                                                        Defines a generic controller to list entities. | 2 | 2 | ||
| EntityLoadByUuidTest | class | Drupal\KernelTests\Core\Entity | core/ | 
                                                                                        Tests loading entities by UUID. | ||||
| EntityMalformedException | class | Drupal\Core\Entity | core/ | 
                                                                                        Defines an exception thrown when a malformed entity is passed. | 10 | |||
| EntityModerationForm | class | Drupal\content_moderation\Form | core/ | 
                                                                                        The EntityModerationForm provides a simple UI for changing moderation state. | 1 | |||
| EntityModerationRouteProvider | class | Drupal\content_moderation\Entity\Routing | core/ | 
                                                                                        Dynamic route provider for the Content moderation module. | 1 | |||
| EntityNodeType | class | Drupal\node\Plugin\migrate\destination | core/ | 
                                                                                        Plugin annotation @MigrateDestination( id = "entity:node_type" ) | ||||
| EntityNonRevisionableTranslatableFieldTest | class | Drupal\KernelTests\Core\Entity | core/ | 
                                                                                        Tests translating a non-revisionable field. | ||||
| EntityNormalizer | class | Drupal\serialization\Normalizer | core/ | 
                                                                                        Normalizes/denormalizes Drupal entity objects into an array structure. | 2 | 1 | 2 | |
| EntityNormalizerTest | class | Drupal\Tests\serialization\Unit\Normalizer | core/ | 
                                                                                        @coversDefaultClass \Drupal\serialization\Normalizer\EntityNormalizer[[api-linebreak]] @group serialization | ||||
| EntityOperations | class | Drupal\content_moderation | core/ | 
                                                                                        Defines a class for reacting to entity events. | 1 | |||
| EntityOperations | class | Drupal\workspaces | core/ | 
                                                                                        Defines a class for reacting to entity events. | 1 | 
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