Classes, traits, and interfaces - 11.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 1529

Name	Deprecated	Object type	Namespace	File name	Summary	Direct uses	Use statements	Strings
CalculatedPermissionsTrait		trait	Drupal\Core\Session	core/lib/Drupal/Core/Session/CalculatedPermissionsTrait.php	Trait for \Drupal\Core\Session\CalculatedPermissionsInterface.		2
CallableResolver		class	Drupal\Core\Utility	core/lib/Drupal/Core/Utility/CallableResolver.php	Resolves PHP callables.		18	2
CallableResolverTest		class	Drupal\Tests\Core\Utility	core/tests/Drupal/Tests/Core/Utility/CallableResolverTest.php	Tests Drupal\Core\Utility\CallableResolver.
Callback		class	Drupal\migrate\Plugin\migrate\process	core/modules/migrate/src/Plugin/migrate/process/Callback.php	Passes the source value to a callback.		1
Callbacks		class	Drupal\ajax_forms_test	core/modules/system/tests/modules/ajax_forms_test/src/Callbacks.php	Simple object for testing methods as Ajax callbacks.		6
Callbacks		class	Drupal\form_test	core/modules/system/tests/modules/form_test/src/Callbacks.php	Simple class for testing methods as Form API callbacks.		5
Callbacks		class	Drupal\entity_test	core/modules/system/tests/modules/entity_test/src/Callbacks.php	Simple object with callbacks.		1
CallbackTest		class	Drupal\Tests\migrate\Unit\process	core/modules/migrate/tests/src/Unit/process/CallbackTest.php	Tests the callback process plugin.
CallsDestructableServiceController		final class	Drupal\destructable_test\Controller	core/modules/system/tests/modules/destructable_test/src/Controller/CallsDestructableServiceController.php	Controller to instantiate the destructable service.
CAlterHooks		class	Drupal\ccc_hook_order_test\Hook	core/modules/system/tests/modules/HookOrder/ccc_hook_order_test/src/Hook/CAlterHooks.php	This class contains hook implementations.		1
CanaryTransport		class	Drupal\mailer_transport_factory_kernel_test\Transport	core/modules/mailer/tests/modules/mailer_transport_factory_kernel_test/src/Transport/CanaryTransport.php	A transport only used to test the transport factory adapter.		1
CanaryTransportFactory		class	Drupal\mailer_transport_factory_kernel_test\Transport	core/modules/mailer/tests/modules/mailer_transport_factory_kernel_test/src/Transport/CanaryTransportFactory.php	A transport factory only used to test the transport factory adapter.
CancelUser		class	Drupal\user\Plugin\Action	core/modules/user/src/Plugin/Action/CancelUser.php	Cancels a user account.
CaseInsensitivePathTest		class	Drupal\FunctionalTests\Routing	core/tests/Drupal/FunctionalTests/Routing/CaseInsensitivePathTest.php	Tests incoming path case insensitivity.
CaseSensitivityTest		class	Drupal\KernelTests\Core\Database	core/tests/Drupal/KernelTests/Core/Database/CaseSensitivityTest.php	Tests handling case sensitive collation.
CastedIntFieldJoin		class	Drupal\views\Plugin\views\join	core/modules/views/src/Plugin/views/join/CastedIntFieldJoin.php	Implementation for the "casted_int_field_join" join.		1
CastedIntFieldJoinTestBase		abstract class	Drupal\Tests\views\Kernel\Plugin	core/modules/views/tests/src/Kernel/Plugin/CastedIntFieldJoinTestBase.php	Tests the "casted_int_field_join" join plugin.	3	3
CastSql		class	Drupal\views\Plugin\views\query	core/modules/views/src/Plugin/views/query/CastSql.php	Cast handling in SQL.			2
CastSqlInterface		interface	Drupal\views\Plugin\views\query	core/modules/views/src/Plugin/views/query/CastSqlInterface.php	Defines an interface for defining cast expressions in SQL.	2	1
CategorizingPluginManager		class	Drupal\Tests\Core\Plugin	core/tests/Drupal/Tests/Core/Plugin/CategorizingPluginManagerTraitTest.php	Class that allows testing the trait.
CategorizingPluginManagerInterface		interface	Drupal\Component\Plugin	core/lib/Drupal/Component/Plugin/CategorizingPluginManagerInterface.php	Defines an interface for plugin managers that categorize plugin definitions.	7	7
CategorizingPluginManagerTrait		trait	Drupal\Core\Plugin	core/lib/Drupal/Core/Plugin/CategorizingPluginManagerTrait.php	Provides a trait for the CategorizingPluginManagerInterface.		6
CategorizingPluginManagerTraitTest		class	Drupal\Tests\Core\Plugin	core/tests/Drupal/Tests/Core/Plugin/CategorizingPluginManagerTraitTest.php	Tests Drupal\Core\Plugin\CategorizingPluginManagerTrait.
CategoryAutocompleteController		class	Drupal\block\Controller	core/modules/block/src/Controller/CategoryAutocompleteController.php	Returns autocomplete responses for block categories.		1
CategoryAutocompleteTest		class	Drupal\Tests\block\Unit	core/modules/block/tests/src/Unit/CategoryAutocompleteTest.php	Tests Drupal\block\Controller\CategoryAutocompleteController.
ChainBreadcrumbBuilderInterface		interface	Drupal\Core\Breadcrumb	core/lib/Drupal/Core/Breadcrumb/ChainBreadcrumbBuilderInterface.php	Defines an interface a chained service that builds the breadcrumb.	1
ChainedFastBackend		class	Drupal\Core\Cache	core/lib/Drupal/Core/Cache/ChainedFastBackend.php	Defines a backend with a fast and a consistent backend chain.		3
ChainedFastBackendFactory		class	Drupal\Core\Cache	core/lib/Drupal/Core/Cache/ChainedFastBackendFactory.php	Defines the chained fast cache backend factory.		1	2
ChainedFastBackendFactoryTest		class	Drupal\Tests\Core\Cache	core/tests/Drupal/Tests/Core/Cache/ChainedFastBackendFactoryTest.php	Tests Drupal\Core\Cache\ChainedFastBackendFactory.
ChainedFastBackendTest		class	Drupal\KernelTests\Core\Cache	core/tests/Drupal/KernelTests/Core/Cache/ChainedFastBackendTest.php	Unit test of the fast chained backend using the generic cache unit test base.
ChainedFastBackendTest		class	Drupal\Tests\Core\Cache	core/tests/Drupal/Tests/Core/Cache/ChainedFastBackendTest.php	Tests Drupal\Core\Cache\ChainedFastBackend.
ChainedPlaceholderStrategy		class	Drupal\Core\Render\Placeholder	core/lib/Drupal/Core/Render/Placeholder/ChainedPlaceholderStrategy.php	Renders placeholders using a chain of placeholder strategies.		1	2
ChainedPlaceholderStrategyTest		class	Drupal\Tests\Core\Render\Placeholder	core/tests/Drupal/Tests/Core/Render/Placeholder/ChainedPlaceholderStrategyTest.php	Tests Drupal\Core\Render\Placeholder\ChainedPlaceholderStrategy.
ChainEntityResolver		class	Drupal\serialization\EntityResolver	core/modules/serialization/src/EntityResolver/ChainEntityResolver.php	Resolver delegating the entity resolution to a chain of resolvers.		1	2
ChainEntityResolverInterface		interface	Drupal\serialization\EntityResolver	core/modules/serialization/src/EntityResolver/ChainEntityResolverInterface.php	An interface for delegating an entity resolution to a chain of resolvers.	1
ChainEntityResolverTest		class	Drupal\Tests\serialization\Unit\EntityResolver	core/modules/serialization/tests/src/Unit/EntityResolver/ChainEntityResolverTest.php	Tests Drupal\serialization\EntityResolver\ChainEntityResolver.
ChainRequestPolicy		class	Drupal\Core\PageCache	core/lib/Drupal/Core/PageCache/ChainRequestPolicy.php	Implements a compound request policy.	2	2
ChainRequestPolicyInterface		interface	Drupal\Core\PageCache	core/lib/Drupal/Core/PageCache/ChainRequestPolicyInterface.php	Defines the interface for compound request policies.	1
ChainRequestPolicyTest		class	Drupal\Tests\Core\PageCache	core/tests/Drupal/Tests/Core/PageCache/ChainRequestPolicyTest.php	Tests Drupal\Core\PageCache\ChainRequestPolicy.
ChainResponsePolicy		class	Drupal\Core\ProxyClass\PageCache	core/lib/Drupal/Core/ProxyClass/PageCache/ChainResponsePolicy.php	Provides a proxy class for \Drupal\Core\PageCache\ChainResponsePolicy.
ChainResponsePolicy		class	Drupal\Core\PageCache	core/lib/Drupal/Core/PageCache/ChainResponsePolicy.php	Implements a compound response policy.		1	4
ChainResponsePolicyInterface		interface	Drupal\Core\PageCache	core/lib/Drupal/Core/PageCache/ChainResponsePolicyInterface.php	Defines the interface for compound request policies.	2
ChainResponsePolicyTest		class	Drupal\Tests\Core\PageCache	core/tests/Drupal/Tests/Core/PageCache/ChainResponsePolicyTest.php	Tests Drupal\Core\PageCache\ChainResponsePolicy.
ChangedCommand		class	Drupal\Core\Ajax	core/lib/Drupal/Core/Ajax/ChangedCommand.php	An AJAX command for marking HTML elements as changed.		2
ChangedFieldItemList		class	Drupal\Core\Field	core/lib/Drupal/Core/Field/ChangedFieldItemList.php	Defines an item list class for changed fields.		2
ChangedItem		class	Drupal\Core\Field\Plugin\Field\FieldType	core/lib/Drupal/Core/Field/Plugin/Field/FieldType/ChangedItem.php	Defines the 'changed' entity field type.	1	2
ChangedTestItem		class	Drupal\entity_test\Plugin\Field\FieldType	core/modules/system/tests/modules/entity_test/src/Plugin/Field/FieldType/ChangedTestItem.php	Defines the 'changed_test' entity field type.
ChangeLogger		final class	Drupal\package_manager\EventSubscriber	core/modules/package_manager/src/EventSubscriber/ChangeLogger.php	Event subscriber to log changes that happen during the stage life cycle.		1
ChangeLoggerTest		class	Drupal\Tests\package_manager\Kernel	core/modules/package_manager/tests/src/Kernel/ChangeLoggerTest.php	Tests Change Logger.
ChangePromotedDefaultTest		class	Drupal\Tests\node\Functional\Update	core/modules/node/tests/src/Functional/Update/ChangePromotedDefaultTest.php	Tests creating base field overrides for the promote field on node types.

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