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
AnnotationWithRequiredAttributes		final class	Drupal\Tests\Component\Annotation\Doctrine\Fixtures	core/tests/Drupal/Tests/Component/Annotation/Doctrine/Fixtures/AnnotationWithRequiredAttributes.php	Plugin annotation @Target("ALL") @Attributes({ @Attribute("value", required = true , type = "string"), @Attribute("annot", required = true , type =…
AnnotationWithRequiredAttributesWithoutContructor		final class	Drupal\Tests\Component\Annotation\Doctrine\Fixtures	core/tests/Drupal/Tests/Component/Annotation/Doctrine/Fixtures/AnnotationWithRequiredAttributesWithoutContructor.php	Plugin annotation @Target("ALL");
AnnotationWithTargetEmpty		class	Drupal\Tests\Component\Annotation\Doctrine	core/tests/Drupal/Tests/Component/Annotation/Doctrine/DocParserTest.php	@Target
AnnotationWithTargetSyntaxError		final class	Drupal\Tests\Component\Annotation\Doctrine\Fixtures	core/tests/Drupal/Tests/Component/Annotation/Doctrine/Fixtures/AnnotationWithTargetSyntaxError.php	Plugin annotation @Target(@)
AnnotationWithVarType		final class	Drupal\Tests\Component\Annotation\Doctrine\Fixtures	core/tests/Drupal/Tests/Component/Annotation/Doctrine/Fixtures/AnnotationWithVarType.php	Plugin annotation @Target("ALL");
AnnotWithDefaultValue		class	Drupal\Tests\Component\Annotation\Doctrine\Fixtures\Annotation	core/tests/Drupal/Tests/Component/Annotation/Doctrine/Fixtures/Annotation/AnnotWithDefaultValue.php
AnnounceCommand		class	Drupal\Core\Ajax	core/lib/Drupal/Core/Ajax/AnnounceCommand.php	AJAX command for a JavaScript Drupal.announce() call.		3
AnonResourceTestTrait		trait	Drupal\Tests\rest\Functional	core/modules/rest/tests/src/Functional/AnonResourceTestTrait.php	Trait for ResourceTestBase subclasses testing $auth=NULL, i.e. authless/anon.		162
AnonymousPrivateTempStoreTest		class	Drupal\KernelTests\Core\TempStore	core/tests/Drupal/KernelTests/Core/TempStore/AnonymousPrivateTempStoreTest.php	Tests the PrivateTempStore for anonymous users.
AnonymousUserResponseSubscriber		class	Drupal\Core\EventSubscriber	core/lib/Drupal/Core/EventSubscriber/AnonymousUserResponseSubscriber.php	Response subscriber to handle finished responses for the anonymous user.			2
AnonymousUserSession		class	Drupal\Core\Session	core/lib/Drupal/Core/Session/AnonymousUserSession.php	An account implementation representing an anonymous user.		16
AnonymousUserSessionTest		class	Drupal\Tests\Core\Session	core/tests/Drupal/Tests/Core/Session/AnonymousUserSessionTest.php	@coversDefaultClass \Drupal\Core\Session\AnonymousUserSession @group Session
Any		class	Drupal\Core\TypedData\Plugin\DataType	core/lib/Drupal/Core/TypedData/Plugin/DataType/Any.php	The "any" data type.
ApcuBackend		class	Drupal\Core\Cache	core/lib/Drupal/Core/Cache/ApcuBackend.php	Stores cache items in the Alternative PHP Cache User Cache (APCu).		1
ApcuBackendFactory		class	Drupal\Core\Cache	core/lib/Drupal/Core/Cache/ApcuBackendFactory.php				2
ApcuBackendTest		class	Drupal\KernelTests\Core\Cache	core/tests/Drupal/KernelTests/Core/Cache/ApcuBackendTest.php	Tests the APCu cache backend.
ApcuFileCacheBackend		class	Drupal\Component\FileCache	core/lib/Drupal/Component/FileCache/ApcuFileCacheBackend.php	APCu backend for the file cache.		1
AppendCommand		class	Drupal\Core\Ajax	core/lib/Drupal/Core/Ajax/AppendCommand.php	An AJAX command for calling the jQuery append() method.	1	4
AppendOp		class	Drupal\Composer\Plugin\Scaffold\Operations	composer/Plugin/Scaffold/Operations/AppendOp.php	Scaffold operation to add to the beginning and/or end of a scaffold file.		3
AppendOpTest		class	Drupal\Tests\Composer\Plugin\Scaffold\Integration	core/tests/Drupal/Tests/Composer/Plugin/Scaffold/Integration/AppendOpTest.php	@coversDefaultClass \Drupal\Composer\Plugin\Scaffold\Operations\AppendOp
Apple		class	Drupal\plugin_test\Plugin\plugin_test\fruit	core/modules/system/tests/modules/plugin_test/src/Plugin/plugin_test/fruit/Apple.php	Plugin annotation @Plugin( id = "apple", label = "Apple", color = "green" )		1
AppRootFactory		class	Drupal\Core	core/lib/Drupal/Core/AppRootFactory.php	Gets the app root from the kernel.			2
ArbitraryRebuildTest		class	Drupal\Tests\system\Functional\Form	core/modules/system/tests/src/Functional/Form/ArbitraryRebuildTest.php	Tests altering forms to be rebuilt so there are multiple steps.
Archiver		class	Drupal\Core\Archiver\Annotation	core/lib/Drupal/Core/Archiver/Annotation/Archiver.php	Defines an archiver annotation object.
ArchiverException		class	Drupal\Core\Archiver	core/lib/Drupal/Core/Archiver/ArchiverException.php	Defines an exception class for Drupal\Core\Archiver\ArchiverInterface.
ArchiverInterface		interface	Drupal\Core\Archiver	core/lib/Drupal/Core/Archiver/ArchiverInterface.php	Defines the common interface for all Archiver classes.	3	1
ArchiverManager		class	Drupal\Core\Archiver	core/lib/Drupal/Core/Archiver/ArchiverManager.php	Provides an Archiver plugin manager.		1	2
ArchiveTar		class	Drupal\Core\Archiver	core/lib/Drupal/Core/Archiver/ArchiveTar.php	Extends Pear's Archive_Tar to use exceptions.		4
AreaDisplayLinkTest		class	Drupal\Tests\views\Kernel\Handler	core/modules/views/tests/src/Kernel/Handler/AreaDisplayLinkTest.php	Tests the core views_handler_area_display_link handler.
AreaEmptyTest		class	Drupal\Tests\views\Kernel\Handler	core/modules/views/tests/src/Kernel/Handler/AreaEmptyTest.php	Tests the generic entity area handler.
AreaEntityTest		class	Drupal\Tests\views\Kernel\Handler	core/modules/views/tests/src/Kernel/Handler/AreaEntityTest.php	Tests the generic entity area handler.
AreaEntityUITest		class	Drupal\Tests\views_ui\Functional	core/modules/views_ui/tests/src/Functional/AreaEntityUITest.php	Tests the entity area UI test.
AreaHTTPStatusCodeTest		class	Drupal\Tests\views\Functional\Handler	core/modules/views/tests/src/Functional/Handler/AreaHTTPStatusCodeTest.php	Tests the http_status_code area handler.
AreaMessagesTest		class	Drupal\Tests\views\Kernel\Handler	core/modules/views/tests/src/Kernel/Handler/AreaMessagesTest.php	Tests the messages area handler.
AreaOrderTest		class	Drupal\Tests\views\Kernel\Handler	core/modules/views/tests/src/Kernel/Handler/AreaOrderTest.php	Tests the view area handler.
AreaPluginBase		abstract class	Drupal\views\Plugin\views\area	core/modules/views/src/Plugin/views/area/AreaPluginBase.php	Base class for area handler plugins.	11	4
AreaResultTest		class	Drupal\Tests\views\Kernel\Handler	core/modules/views/tests/src/Kernel/Handler/AreaResultTest.php	Tests the result area handler.
AreaTest		class	Drupal\Tests\views\Functional\Handler	core/modules/views/tests/src/Functional/Handler/AreaTest.php	Tests the plugin base of the area handler.
AreaTextTest		class	Drupal\Tests\views\Kernel\Handler	core/modules/views/tests/src/Kernel/Handler/AreaTextTest.php	Tests the core views_handler_area_text handler.
AreaTitleTest		class	Drupal\Tests\views\Kernel\Handler	core/modules/views/tests/src/Kernel/Handler/AreaTitleTest.php	Tests the title area handler.
AreaTitleWebTest		class	Drupal\Tests\views\Functional\Handler	core/modules/views/tests/src/Functional/Handler/AreaTitleWebTest.php	Tests the title area handler with a web test.
AreaViewTest		class	Drupal\Tests\views\Kernel\Handler	core/modules/views/tests/src/Kernel/Handler/AreaViewTest.php	Tests the view area handler.
ArgumentDateTest		class	Drupal\Tests\views\Kernel\Handler	core/modules/views/tests/src/Kernel/Handler/ArgumentDateTest.php	Tests the core date argument handlers.
ArgumentDateTimeTest		class	Drupal\Tests\datetime\Kernel\Views	core/modules/datetime/tests/src/Kernel/Views/ArgumentDateTimeTest.php	Tests the Drupal\datetime\Plugin\views\filter\Date handler.
ArgumentDefaultPluginBase		abstract class	Drupal\views\Plugin\views\argument_default	core/modules/views/src/Plugin/views/argument_default/ArgumentDefaultPluginBase.php	The fixed argument default handler; also used as the base.	8	5
ArgumentDefaultTest		class	Drupal\Tests\views\Functional\Plugin	core/modules/views/tests/src/Functional/Plugin/ArgumentDefaultTest.php	Tests pluggable argument_default for views.
ArgumentDefaultTest		class	Drupal\views_test_data\Plugin\views\argument_default	core/modules/views/tests/modules/views_test_data/src/Plugin/views/argument_default/ArgumentDefaultTest.php	Defines an argument default test plugin.		1
ArgumentDefaultTest		class	Drupal\Tests\user\Kernel\Views	core/modules/user/tests/src/Kernel/Views/ArgumentDefaultTest.php	Tests views user argument default plugin.
ArgumentLanguageTest		class	Drupal\Tests\language\Kernel\Views	core/modules/language/tests/src/Kernel/Views/ArgumentLanguageTest.php	Tests the argument language handler.
ArgumentNodeRevisionIdTest		class	Drupal\Tests\node\Kernel\Views	core/modules/node/tests/src/Kernel/Views/ArgumentNodeRevisionIdTest.php	Tests the node_vid handler.

Other projects

Buggy or inaccurate documentation? Please file an issue. Need support? Need help programming? Connect with the Drupal community.