Classes, traits, and interfaces

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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

Name contains

Namespace contains

Description contains

Name	Type	Namespace	Location	Description	Direct uses	Use statements	Strings
LocalActionDefault	class	Drupal\Core\Menu	core/lib/Drupal/Core/Menu/LocalActionDefault.php	Provides a default implementation for local action plugins.	6	7	2
LocalTaskDefault	class	Drupal\Core\Menu	core/lib/Drupal/Core/Menu/LocalTaskDefault.php	Default object used for LocalTaskPlugins.	6	6	4
DefaultLazyPluginCollection	class	Drupal\Core\Plugin	core/lib/Drupal/Core/Plugin/DefaultLazyPluginCollection.php	Provides a default plugin collection for a plugin type.	6	8
LocalStream	abstract class	Drupal\Core\StreamWrapper	core/lib/Drupal/Core/StreamWrapper/LocalStream.php	Defines a Drupal stream wrapper base class for local files.	6	2
Migration	class	Drupal\migrate\Plugin	core/modules/migrate/src/Plugin/Migration.php		6	7
BaseFieldOverrideResourceTestBase	abstract class	Drupal\FunctionalTests\Rest	core/tests/Drupal/FunctionalTests/Rest/BaseFieldOverrideResourceTestBase.php		6
DateFormatResourceTestBase	abstract class	Drupal\FunctionalTests\Rest	core/tests/Drupal/FunctionalTests/Rest/DateFormatResourceTestBase.php	ResourceTestBase for DateFormat entity.	6
EntityFormDisplayResourceTestBase	abstract class	Drupal\FunctionalTests\Rest	core/tests/Drupal/FunctionalTests/Rest/EntityFormDisplayResourceTestBase.php		6
EntityFormModeResourceTestBase	abstract class	Drupal\FunctionalTests\Rest	core/tests/Drupal/FunctionalTests/Rest/EntityFormModeResourceTestBase.php		6
EntityViewModeResourceTestBase	abstract class	Drupal\FunctionalTests\Rest	core/tests/Drupal/FunctionalTests/Rest/EntityViewModeResourceTestBase.php		6
Query	abstract class	Drupal\Core\Database\Query	core/lib/Drupal/Core/Database/Query/Query.php	Base class for query builders.	6
FieldTestBase	abstract class	Drupal\Tests\field\Functional	core/modules/field/tests/src/Functional/FieldTestBase.php	Parent class for Field API tests.	6	3
JsonApiFunctionalTestBase	abstract class	Drupal\Tests\jsonapi\Functional	core/modules/jsonapi/tests/src/Functional/JsonApiFunctionalTestBase.php	Provides helper methods for the JSON:API module's functional tests.	6
JsonapiKernelTestBase	abstract class	Drupal\Tests\jsonapi\Kernel	core/modules/jsonapi/tests/src/Kernel/JsonapiKernelTestBase.php	Contains shared test utility methods.	6	6
BlockResourceTestBase	abstract class	Drupal\Tests\block\Functional\Rest	core/modules/block/tests/src/Functional/Rest/BlockResourceTestBase.php		6
BlockContentTypeResourceTestBase	abstract class	Drupal\Tests\block_content\Functional\Rest	core/modules/block_content/tests/src/Functional/Rest/BlockContentTypeResourceTestBase.php		6
CommentResourceTestBase	abstract class	Drupal\Tests\comment\Functional\Rest	core/modules/comment/tests/src/Functional/Rest/CommentResourceTestBase.php		6
CommentTypeResourceTestBase	abstract class	Drupal\Tests\comment\Functional\Rest	core/modules/comment/tests/src/Functional/Rest/CommentTypeResourceTestBase.php	ResourceTestBase for CommentType entity.	6
CommentTestBase	abstract class	Drupal\Tests\comment\Functional\Views	core/modules/comment/tests/src/Functional/Views/CommentTestBase.php	Provides setup and helper methods for comment views tests.	6
ContactFormResourceTestBase	abstract class	Drupal\Tests\contact\Functional\Rest	core/modules/contact/tests/src/Functional/Rest/ContactFormResourceTestBase.php		6
MessageResourceTestBase	abstract class	Drupal\Tests\contact\Functional\Rest	core/modules/contact/tests/src/Functional/Rest/MessageResourceTestBase.php		6
EditorResourceTestBase	abstract class	Drupal\Tests\editor\Functional\Rest	core/modules/editor/tests/src/Functional/Rest/EditorResourceTestBase.php	ResourceTestBase for Editor entity.	6
FieldConfigResourceTestBase	abstract class	Drupal\Tests\field\Functional\Rest	core/modules/field/tests/src/Functional/Rest/FieldConfigResourceTestBase.php		6
FieldStorageConfigResourceTestBase	abstract class	Drupal\Tests\field\Functional\Rest	core/modules/field/tests/src/Functional/Rest/FieldStorageConfigResourceTestBase.php		6
FilterFormatResourceTestBase	abstract class	Drupal\Tests\filter\Functional\Rest	core/modules/filter/tests/src/Functional/Rest/FilterFormatResourceTestBase.php		6
ImageStyleResourceTestBase	abstract class	Drupal\Tests\image\Functional\Rest	core/modules/image/tests/src/Functional/Rest/ImageStyleResourceTestBase.php	ResourceTestBase for ImageStyle entity.	6
ConfigurableLanguageResourceTestBase	abstract class	Drupal\Tests\language\Functional\Rest	core/modules/language/tests/src/Functional/Rest/ConfigurableLanguageResourceTestBase.php		6
ContentLanguageSettingsResourceTestBase	abstract class	Drupal\Tests\language\Functional\Rest	core/modules/language/tests/src/Functional/Rest/ContentLanguageSettingsResourceTestBase.php		6
LayoutBuilderEntityViewDisplayResourceTestBase	abstract class	Drupal\Tests\layout_builder\Functional\Rest	core/modules/layout_builder/tests/src/Functional/Rest/LayoutBuilderEntityViewDisplayResourceTestBase.php	Provides a base class for testing LayoutBuilderEntityViewDisplay resources.	6
MediaResourceTestBase	abstract class	Drupal\Tests\media\Functional\Rest	core/modules/media/tests/src/Functional/Rest/MediaResourceTestBase.php		6
MediaTypeResourceTestBase	abstract class	Drupal\Tests\media\Functional\Rest	core/modules/media/tests/src/Functional/Rest/MediaTypeResourceTestBase.php		6
MenuLinkContentResourceTestBase	abstract class	Drupal\Tests\menu_link_content\Functional\Rest	core/modules/menu_link_content/tests/src/Functional/Rest/MenuLinkContentResourceTestBase.php	ResourceTestBase for MenuLinkContent entity.	6
SourcePluginBase	abstract class	Drupal\migrate\Plugin\migrate\source	core/modules/migrate/src/Plugin/migrate/source/SourcePluginBase.php	The base class for source plugins.	6	6
NodeTypeResourceTestBase	abstract class	Drupal\Tests\node\Functional\Rest	core/modules/node/tests/src/Functional/Rest/NodeTypeResourceTestBase.php	ResourceTestBase for NodeType entity.	6
PathAliasResourceTestBase	abstract class	Drupal\Tests\path_alias\Functional\Rest	core/modules/path_alias/tests/src/Functional/Rest/PathAliasResourceTestBase.php	Base class for path_alias EntityResource tests.	6
ResponsiveImageStyleResourceTestBase	abstract class	Drupal\Tests\responsive_image\Functional\Rest	core/modules/responsive_image/tests/src/Functional/Rest/ResponsiveImageStyleResourceTestBase.php	ResourceTestBase for ResponsiveImageStyle entity.	6
RestResourceConfigResourceTestBase	abstract class	Drupal\Tests\rest\Functional\Rest	core/modules/rest/tests/src/Functional/Rest/RestResourceConfigResourceTestBase.php		6
SearchPageResourceTestBase	abstract class	Drupal\Tests\search\Functional\Rest	core/modules/search/tests/src/Functional/Rest/SearchPageResourceTestBase.php	Base class for Search page tests.	6
ShortcutResourceTestBase	abstract class	Drupal\Tests\shortcut\Functional\Rest	core/modules/shortcut/tests/src/Functional/Rest/ShortcutResourceTestBase.php	ResourceTestBase for Shortcut entity.	6
ShortcutSetResourceTestBase	abstract class	Drupal\Tests\shortcut\Functional\Rest	core/modules/shortcut/tests/src/Functional/Rest/ShortcutSetResourceTestBase.php	ResourceTestBase for ShortcutSet entity.	6
MenuResourceTestBase	abstract class	Drupal\Tests\system\Functional\Rest	core/modules/system/tests/src/Functional/Rest/MenuResourceTestBase.php		6
TermResourceTestBase	abstract class	Drupal\Tests\taxonomy\Functional\Rest	core/modules/taxonomy/tests/src/Functional/Rest/TermResourceTestBase.php		6
VocabularyResourceTestBase	abstract class	Drupal\Tests\taxonomy\Functional\Rest	core/modules/taxonomy/tests/src/Functional/Rest/VocabularyResourceTestBase.php		6
TourResourceTestBase	abstract class	Drupal\Tests\tour\Functional\Rest	core/modules/tour/tests/src/Functional/Rest/TourResourceTestBase.php		6
RoleResourceTestBase	abstract class	Drupal\Tests\user\Functional\Rest	core/modules/user/tests/src/Functional/Rest/RoleResourceTestBase.php		6
UserResourceTestBase	abstract class	Drupal\Tests\user\Functional\Rest	core/modules/user/tests/src/Functional/Rest/UserResourceTestBase.php		6
InOperator	class	Drupal\views\Plugin\views\filter	core/modules/views/src/Plugin/views/filter/InOperator.php		6	6
ViewResourceTestBase	abstract class	Drupal\Tests\views\Functional\Rest	core/modules/views/tests/src/Functional/Rest/ViewResourceTestBase.php		6
WorkflowResourceTestBase	abstract class	Drupal\Tests\workflows\Functional\Rest	core/modules/workflows/tests/src/Functional/Rest/WorkflowResourceTestBase.php	ResourceTestBase for Workflow entity.	6
ConfigStorageTestBase	abstract class	Drupal\KernelTests\Core\Config\Storage	core/tests/Drupal/KernelTests/Core/Config/Storage/ConfigStorageTestBase.php	Base class for testing storage operations.	6

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