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 1519

Name	Deprecated	Object type	Namespace	File name	Summary	Direct uses	Use statements	Strings
BackendChainImplementationUnitTest		class	Drupal\Tests\Core\Cache	core/tests/Drupal/Tests/Core/Cache/BackendChainImplementationUnitTest.php	Unit test of backend chain implementation specifics.
BackendChainTest		class	Drupal\KernelTests\Core\Cache	core/tests/Drupal/KernelTests/Core/Cache/BackendChainTest.php	Unit test of the backend chain using the generic cache unit test base.
BackendCompilerPass		class	Drupal\Core\DependencyInjection\Compiler	core/lib/Drupal/Core/DependencyInjection/Compiler/BackendCompilerPass.php	Defines a compiler pass to allow automatic override per backend.		2
BackendCompilerPassTest		class	Drupal\Tests\Core\DependencyInjection\Compiler	core/tests/Drupal/Tests/Core/DependencyInjection/Compiler/BackendCompilerPassTest.php	Tests Drupal\Core\DependencyInjection\Compiler\BackendCompilerPass.
BackwardsCompatibilityClassLoader		final class	Drupal\Core\ClassLoader	core/lib/Drupal/Core/ClassLoader/BackwardsCompatibilityClassLoader.php	Adds backwards compatibility support for deprecated classes.		2
BackwardsCompatibilityClassLoaderPass		class	Drupal\Core\DependencyInjection\Compiler	core/lib/Drupal/Core/DependencyInjection/Compiler/BackwardsCompatibilityClassLoaderPass.php	Compiler pass to merge moved classes into a single container parameter.		1
BackwardsCompatibilityClassLoaderTest		class	Drupal\KernelTests\Core\ClassLoader	core/tests/Drupal/KernelTests/Core/ClassLoader/BackwardsCompatibilityClassLoaderTest.php	Tests Drupal\Core\ClassLoader\BackwardsCompatibilityClassLoader.
BadPluginDefinitionException		class	Drupal\migrate\Plugin\Exception	core/modules/migrate/src/Plugin/Exception/BadPluginDefinitionException.php	Defines a class for bad plugin definition exceptions.		4
BaloneySpam		class	Drupal\block_test\Plugin\Condition	core/modules/block/tests/modules/block_test/src/Plugin/Condition/BaloneySpam.php	Provides a 'baloney_spam' condition.
BAlterHooks		class	Drupal\bbb_hook_order_test\Hook	core/modules/system/tests/modules/HookOrder/bbb_hook_order_test/src/Hook/BAlterHooks.php	This class contains hook implementations.		1
BanAdmin		class	Drupal\ban\Form	core/modules/ban/src/Form/BanAdmin.php	Displays banned IP addresses.		1	1
BanAdminTest		class	Drupal\Tests\ban\Unit	core/modules/ban/tests/src/Unit/BanAdminTest.php	Tests the BanAdmin form.
Banana		class	Drupal\plugin_test\Plugin\plugin_test\fruit	core/modules/system/tests/modules/plugin_test/src/Plugin/plugin_test/fruit/Banana.php	Plugin annotation @Plugin( id = "banana", label = "Banana", color = "yellow", uses = { "bread" = @Translation("Banana bread"), "loaf" = @PluralTranslation( singular = "@count loaf", plural = "@count loaves" ) } )
BanDelete		class	Drupal\ban\Form	core/modules/ban/src/Form/BanDelete.php	Provides a form to unban IP addresses.			1
BanHooks		class	Drupal\ban\Hook	core/modules/ban/src/Hook/BanHooks.php	Hook implementations for ban.
BanIpManager		class	Drupal\ban	core/modules/ban/src/BanIpManager.php	Ban IP manager.			2
BanIpManagerInterface		interface	Drupal\ban	core/modules/ban/src/BanIpManagerInterface.php	Provides an interface defining a BanIp manager.	1	5
BanIpTest		class	Drupal\Tests\ban\Kernel	core/modules/ban/tests/src/Kernel/BanIpTest.php	@group ban @group legacy
BanMiddleware		class	Drupal\ban	core/modules/ban/src/BanMiddleware.php	Provides a HTTP middleware to implement IP based banning.		1	2
BanMiddlewareTest		class	Drupal\Tests\ban\Unit	core/modules/ban/tests/src/Unit/BanMiddlewareTest.php	Tests Drupal\ban\BanMiddleware.
Bar		class	Drupal\image_test\Plugin\ImageToolkit\Operation\test	core/modules/system/tests/modules/image_test/src/Plugin/ImageToolkit/Operation/test/Bar.php	Builds an image toolkit operation.
BarAccessPolicy		class	Drupal\Tests\Core\Session	core/tests/Drupal/Tests/Core/Session/AccessPolicyProcessorTest.php	A test access policy for 'foo' and 'bar' permissions.
BarAlterAccessPolicy		class	Drupal\Tests\Core\Session	core/tests/Drupal/Tests/Core/Session/AccessPolicyProcessorTest.php	A test access policy that adds a permission if another permission exists.
BarClass		class	Drupal\Tests\Core\DependencyInjection\Fixture	core/tests/Drupal/Tests/Core/DependencyInjection/Fixture/BarClass.php	Stub class which acts as a service to test the container.		1
BareHtmlPageRenderer		class	Drupal\Core\Render	core/lib/Drupal/Core/Render/BareHtmlPageRenderer.php	Default bare HTML page renderer.			2
BareHtmlPageRenderer		class	Drupal\Core\ProxyClass\Render	core/lib/Drupal/Core/ProxyClass/Render/BareHtmlPageRenderer.php	Provides a proxy class for \Drupal\Core\Render\BareHtmlPageRenderer.
BareHtmlPageRendererInterface		interface	Drupal\Core\Render	core/lib/Drupal/Core/Render/BareHtmlPageRendererInterface.php	Bare HTML page renderer.	2	4
BaseCommand		class	Drupal\Core\Ajax	core/lib/Drupal/Core/Ajax/BaseCommand.php	Base command that only exists to simplify AJAX commands.
BaseFieldAccessTest		class	Drupal\Tests\views\Functional\Entity	core/modules/views/tests/src/Functional/Entity/BaseFieldAccessTest.php	Tests views base field access.
BaseFieldDefinition		class	Drupal\Core\Field	core/lib/Drupal/Core/Field/BaseFieldDefinition.php	A class for defining entity fields.	2	102
BaseFieldDefinitionTest		class	Drupal\Tests\Core\Entity	core/tests/Drupal/Tests/Core/Entity/BaseFieldDefinitionTest.php	Unit test for BaseFieldDefinition.
BaseFieldDefinitionTest		class	Drupal\Tests\migrate\Unit\Plugin\migrate\destination	core/modules/migrate/tests/src/Unit/Plugin/migrate/destination/EntityTestBase.php	Stub class for BaseFieldDefinition.
BaseFieldDefinitionTestBase		abstract class	Drupal\Tests\Core\Field	core/tests/Drupal/Tests/Core/Field/BaseFieldDefinitionTestBase.php	Provides setup method for testing base field definitions.	1	1
BaseFieldFileFormatterBase		abstract class	Drupal\file\Plugin\Field\FieldFormatter	core/modules/file/src/Plugin/Field/FieldFormatter/BaseFieldFileFormatterBase.php	Base class for file formatters, which allow to link to the file download URL.	4
BaseFieldOverride		class	Drupal\Core\Field\Entity	core/lib/Drupal/Core/Field/Entity/BaseFieldOverride.php	Defines the base field override entity.		12
BaseFieldOverrideAccessControlHandler		class	Drupal\Core\Field	core/lib/Drupal/Core/Field/BaseFieldOverrideAccessControlHandler.php	Provides en entity access control handler for base field override entity.		1
BaseFieldOverrideJsonAnonTest		class	Drupal\FunctionalTests\Rest	core/tests/Drupal/FunctionalTests/Rest/BaseFieldOverrideJsonAnonTest.php	Tests Base Field Override Json Anon.
BaseFieldOverrideJsonBasicAuthTest		class	Drupal\FunctionalTests\Rest	core/tests/Drupal/FunctionalTests/Rest/BaseFieldOverrideJsonBasicAuthTest.php	Tests Base Field Override Json Basic Auth.
BaseFieldOverrideJsonCookieTest		class	Drupal\FunctionalTests\Rest	core/tests/Drupal/FunctionalTests/Rest/BaseFieldOverrideJsonCookieTest.php	Tests Base Field Override Json Cookie.
BaseFieldOverrideResourceTestBase		abstract class	Drupal\FunctionalTests\Rest	core/tests/Drupal/FunctionalTests/Rest/BaseFieldOverrideResourceTestBase.php	Resource test base for BaseFieldOverride entity.	6
BaseFieldOverrideStorage		class	Drupal\Core\Field	core/lib/Drupal/Core/Field/BaseFieldOverrideStorage.php	Storage class for base field overrides.		1
BaseFieldOverrideTest		class	Drupal\KernelTests\Core\Field\Entity	core/tests/Drupal/KernelTests/Core/Field/Entity/BaseFieldOverrideTest.php	Tests Drupal\Core\Field\Entity\BaseFieldOverride.
BaseFieldOverrideTest		class	Drupal\Tests\jsonapi\Functional	core/modules/jsonapi/tests/src/Functional/BaseFieldOverrideTest.php	JSON:API integration test for the "BaseFieldOverride" config entity type.
BaseFieldOverrideValidationTest		class	Drupal\KernelTests\Core\Entity	core/tests/Drupal/KernelTests/Core/Entity/BaseFieldOverrideValidationTest.php	Tests validation of base_field_override entities.
BaseFieldOverrideXmlAnonTest		class	Drupal\FunctionalTests\Rest	core/tests/Drupal/FunctionalTests/Rest/BaseFieldOverrideXmlAnonTest.php	Tests Base Field Override Xml Anon.
BaseFieldOverrideXmlBasicAuthTest		class	Drupal\FunctionalTests\Rest	core/tests/Drupal/FunctionalTests/Rest/BaseFieldOverrideXmlBasicAuthTest.php	Tests Base Field Override Xml Basic Auth.
BaseFieldOverrideXmlCookieTest		class	Drupal\FunctionalTests\Rest	core/tests/Drupal/FunctionalTests/Rest/BaseFieldOverrideXmlCookieTest.php	Tests Base Field Override Xml Cookie.
BaseFileConstraintValidator		abstract class	Drupal\file\Plugin\Validation\Constraint	core/modules/file/src/Plugin/Validation/Constraint/BaseFileConstraintValidator.php	Provides a base class for file constraint validators.	7
BaseFormIdInterface		interface	Drupal\Core\Form	core/lib/Drupal/Core/Form/BaseFormIdInterface.php	Provides an interface for a Form that has a base form ID.	5	5
BaseRequirementsFulfilledValidator		final class	Drupal\package_manager\Validator	core/modules/package_manager/src/Validator/BaseRequirementsFulfilledValidator.php	Validates that base requirements do not have any errors.		1

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