Classes, traits, and interfaces - 8.9.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 1511

Name	Deprecated	Object type	Namespace	File name	Summary	Direct uses	Use statements	Strings
AnnotationTargetAnnotation		final class	Drupal\Tests\Component\Annotation\Doctrine\Fixtures	core/tests/Drupal/Tests/Component/Annotation/Doctrine/Fixtures/AnnotationTargetAnnotation.php	Plugin annotation @Target({ "ANNOTATION" })		1
AnnotationTargetClass		final class	Drupal\Tests\Component\Annotation\Doctrine\Fixtures	core/tests/Drupal/Tests/Component/Annotation/Doctrine/Fixtures/AnnotationTargetClass.php	Plugin annotation @Target("CLASS");		3
AnnotationTargetPropertyMethod		final class	Drupal\Tests\Component\Annotation\Doctrine\Fixtures	core/tests/Drupal/Tests/Component/Annotation/Doctrine/Fixtures/AnnotationTargetPropertyMethod.php	Plugin annotation @Target({ "METHOD", "PROPERTY" })		2
AnnotationWithAttributes		final class	Drupal\Tests\Component\Annotation\Doctrine\Fixtures	core/tests/Drupal/Tests/Component/Annotation/Doctrine/Fixtures/AnnotationWithAttributes.php	Plugin annotation @Target("ALL") @Attributes({ @Attribute("mixed", type = "mixed"), @Attribute("boolean", type = "boolean"), @Attribute("bool", type = "bool"), @Attribute("float", …
AnnotationWithConstants		final class	Drupal\Tests\Component\Annotation\Doctrine\Fixtures	core/tests/Drupal/Tests/Component/Annotation/Doctrine/Fixtures/AnnotationWithConstants.php	Plugin annotation @Target("ALL");		1
AnnotationWithInvalidTargetDeclaration		class	Drupal\Tests\Component\Annotation\Doctrine	core/tests/Drupal/Tests/Component/Annotation/Doctrine/DocParserTest.php	Plugin annotation @Target("Foo");
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.		161
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.		17
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.
Apcu4Backend	in drupal:8.8.0 and is removed from from drupal:9.0.0. Use \Drupal\Core\Cache\ApcuBackend instead.	class	Drupal\Core\Cache	core/lib/Drupal/Core/Cache/Apcu4Backend.php	Stores cache items in the Alternative PHP Cache User Cache (APCu).
ApcuBackend		class	Drupal\Core\Cache	core/lib/Drupal/Core/Cache/ApcuBackend.php	Stores cache items in the Alternative PHP Cache User Cache (APCu).	1	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.		3
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" )
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.

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