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

core/core.api.php, line 1523

Name	Deprecated	Object type	Namespace	File name	Summary	Direct uses	Use statements	Strings
TwoColumnLayout		class	Drupal\layout_builder\Plugin\Layout	core/modules/layout_builder/src/Plugin/Layout/TwoColumnLayout.php	Configurable two column layout plugin class.			1
Type		class	Drupal\node\Plugin\views\argument	core/modules/node/src/Plugin/views/argument/Type.php	Argument handler to accept a node type.
TypedConfigInterface		interface	Drupal\Core\Config\Schema	core/lib/Drupal/Core/Config/Schema/TypedConfigInterface.php	Interface for a typed configuration object that contains multiple elements.	1	1
TypedConfigManager		class	Drupal\Core\Config	core/lib/Drupal/Core/Config/TypedConfigManager.php	Manages config schema type plugins.		1	2
TypedConfigManagerInterface		interface	Drupal\Core\Config	core/lib/Drupal/Core/Config/TypedConfigManagerInterface.php	Defines an interface for managing config schema type plugins.	1	19
TypedConfigTest		class	Drupal\KernelTests\Config	core/tests/Drupal/KernelTests/Config/TypedConfigTest.php	Tests config validation mechanism.
TypedData		abstract class	Drupal\Core\TypedData	core/lib/Drupal/Core/TypedData/TypedData.php	The abstract base class for typed data.	14	12
TypedDataAwareValidatorTrait		trait	Drupal\Core\TypedData\Validation	core/lib/Drupal/Core/TypedData/Validation/TypedDataAwareValidatorTrait.php	Defines a trait to access the typed data object of a validated value.		5
TypedDataCacheableDependencyInterface		interface	Drupal\Tests\Core\Plugin\Context	core/tests/Drupal/Tests/Core/Plugin/Context/ContextTest.php	Test interface used for mocking.
TypedDataDefinitionTest		class	Drupal\KernelTests\Core\TypedData	core/tests/Drupal/KernelTests/Core/TypedData/TypedDataDefinitionTest.php	Tests deriving metadata of core data types.
TypedDataInterface		interface	Drupal\Core\TypedData	core/lib/Drupal/Core/TypedData/TypedDataInterface.php	Interface for typed data objects.	3	28
TypedDataInternalPropertiesHelper		class	Drupal\Core\TypedData	core/lib/Drupal/Core/TypedData/TypedDataInternalPropertiesHelper.php	Helper class for internal properties.		8
TypedDataManager		class	Drupal\Core\TypedData	core/lib/Drupal/Core/TypedData/TypedDataManager.php	Manages data type plugins.	1	6	2
TypedDataManagerInterface		interface	Drupal\Core\TypedData	core/lib/Drupal/Core/TypedData/TypedDataManagerInterface.php	Defines an interface for typed data manager.	2	22
TypedDataMetadata		class	Drupal\Core\TypedData\Validation	core/lib/Drupal/Core/TypedData/Validation/TypedDataMetadata.php	Validator metadata for typed data objects.
TypedDataNormalizer		class	Drupal\serialization\Normalizer	core/modules/serialization/src/Normalizer/TypedDataNormalizer.php	Converts typed data objects to arrays.		1	2
TypedDataNormalizerTest		class	Drupal\Tests\serialization\Unit\Normalizer	core/modules/serialization/tests/src/Unit/Normalizer/TypedDataNormalizerTest.php	@coversDefaultClass \Drupal\serialization\Normalizer\TypedDataNormalizer[[api-linebreak]] @group serialization
TypedDataStringBlock		class	Drupal\plugin_test\Plugin\plugin_test\mock_block	core/modules/system/tests/modules/plugin_test/src/Plugin/plugin_test/mock_block/TypedDataStringBlock.php	Implements a String TypedData contextual block plugin.
TypedDataTest		class	Drupal\KernelTests\Core\TypedData	core/tests/Drupal/KernelTests/Core/TypedData/TypedDataTest.php	Tests the functionality of all core data types.
TypedDataTrait		trait	Drupal\Core\TypedData	core/lib/Drupal/Core/TypedData/TypedDataTrait.php	Wrapper methods for classes that needs typed data manager object.		3
TypeLinkManager		class	Drupal\hal\LinkManager	core/modules/hal/src/LinkManager/TypeLinkManager.php				2
TypeLinkManagerInterface		interface	Drupal\hal\LinkManager	core/modules/hal/src/LinkManager/TypeLinkManagerInterface.php		2
Uid		class	Drupal\user\Plugin\views\argument	core/modules/user/src/Plugin/views/argument/Uid.php	Argument handler to accept a user id.	1	1
UidRevision		class	Drupal\node\Plugin\views\filter	core/modules/node/src/Plugin/views/filter/UidRevision.php	Filter handler to check for revisions a certain user has created.
UidRevision		class	Drupal\node\Plugin\views\argument	core/modules/node/src/Plugin/views/argument/UidRevision.php	Filter handler, accepts a user ID.
UidUpdateToSerialTest		class	Drupal\Tests\user\Functional	core/modules/user/tests/src/Functional/UidUpdateToSerialTest.php	Tests user_update_9301().
UiHelperTrait		trait	Drupal\Tests	core/tests/Drupal/Tests/UiHelperTrait.php	Provides UI helper methods.
UITestBase		abstract class	Drupal\Tests\views_ui\Functional	core/modules/views_ui/tests/src/Functional/UITestBase.php	Provides a base class for testing the Views UI.	46	7
UmamiMultilingualInstallTest		class	Drupal\Tests\demo_umami\Functional	core/profiles/demo_umami/tests/src/Functional/UmamiMultilingualInstallTest.php	Tests the multilingual installer installing the Umami profile.
UnapprovedComments		class	Drupal\comment\Plugin\Menu\LocalTask	core/modules/comment/src/Plugin/Menu/LocalTask/UnapprovedComments.php	Provides a local task that shows the amount of unapproved comments.			1
UnblockUser		class	Drupal\user\Plugin\Action	core/modules/user/src/Plugin/Action/UnblockUser.php	Unblocks a user.
UncacheableDependencyTrait		trait	Drupal\Core\Cache	core/lib/Drupal/Core/Cache/UncacheableDependencyTrait.php	Trait to implement CacheableDependencyInterface for uncacheable objects.		3
UncacheableFieldHandlerTrait		trait	Drupal\views\Plugin\views\field	core/modules/views/src/Plugin/views/field/UncacheableFieldHandlerTrait.php	Trait encapsulating the logic for uncacheable field handlers.		1
UncacheableTestAccessResult		class	Drupal\Tests\Core\Access	core/tests/Drupal/Tests/Core/Access/AccessResultTest.php
UncaughtExceptionTest		class	Drupal\FunctionalTests\Bootstrap	core/tests/Drupal/FunctionalTests/Bootstrap/UncaughtExceptionTest.php	Tests kernel panic when things are really messed up.
UnchangingCacheableDependencyTrait		trait	Drupal\Core\Cache	core/lib/Drupal/Core/Cache/UnchangingCacheableDependencyTrait.php	Trait to implement CacheableDependencyInterface for unchanging objects.		4
Undefined		class	Drupal\Core\Config\Schema	core/lib/Drupal/Core/Config/Schema/Undefined.php	Undefined configuration element.		3	1
UndefinedLinkTemplateException		class	Drupal\Core\Entity\Exception	core/lib/Drupal/Core/Entity/Exception/UndefinedLinkTemplateException.php	Defines an exception class for undefined link templates.		4
UnformattedSummary		class	Drupal\views\Plugin\views\style	core/modules/views/src/Plugin/views/style/UnformattedSummary.php	The default style plugin for summaries.
Unicode		class	Drupal\Component\Utility	core/lib/Drupal/Component/Utility/Unicode.php	Provides Unicode-related conversions and operations.		41
UnicodeTest		class	Drupal\Tests\Component\Utility	core/tests/Drupal/Tests/Component/Utility/UnicodeTest.php	Test unicode handling features implemented in Unicode component.
UnicornEditor		class	Drupal\editor_test\Plugin\Editor	core/modules/editor/tests/modules/editor_test/src/Plugin/Editor/UnicornEditor.php	Defines a Unicorn-powered text editor for Drupal (for testing purposes).
UninstallDefaultContentTest		class	Drupal\Tests\demo_umami_content\Functional	core/profiles/demo_umami/modules/demo_umami_content/tests/src/Functional/UninstallDefaultContentTest.php	Tests that uninstalling default content removes created content.
UninstalledExtensionException		class	Drupal\Core\Extension\Exception	core/lib/Drupal/Core/Extension/Exception/UninstalledExtensionException.php	Exception class thrown when a specified extension has not been installed.
UninstallKernelTest		class	Drupal\Tests\system\Kernel\Installer	core/modules/system/tests/src/Kernel/Installer/UninstallKernelTest.php	Tests the uninstallation of modules.
UninstallTest		class	Drupal\Tests\system\Functional\Module	core/modules/system/tests/src/Functional/Module/UninstallTest.php	Tests the uninstallation of modules.
UniqueFieldConstraint		class	Drupal\Core\Validation\Plugin\Validation\Constraint	core/lib/Drupal/Core/Validation/Plugin/Validation/Constraint/UniqueFieldConstraint.php	Checks if an entity field has a unique value.	4	4
UniqueFieldConstraintTest		class	Drupal\KernelTests\Core\Validation	core/tests/Drupal/KernelTests/Core/Validation/UniqueFieldConstraintTest.php	Tests the unique field value validation constraint.
UniqueFieldValueValidator		class	Drupal\Core\Validation\Plugin\Validation\Constraint	core/lib/Drupal/Core/Validation/Plugin/Validation/Constraint/UniqueFieldValueValidator.php	Validates that a field is unique for the given entity type.
UniqueLabelInListConstraint		class	Drupal\ckeditor5\Plugin\Validation\Constraint	core/modules/ckeditor5/src/Plugin/Validation/Constraint/UniqueLabelInListConstraint.php	Uniquely labeled list item constraint.

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