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 1518

Name	Deprecated	Object type	Namespace	File name	Summary	Direct uses	Use statements	Strings
BooleanFormatterSettingsTest		class	Drupal\Tests\field\FunctionalJavascript\Boolean	core/modules/field/tests/src/FunctionalJavascript/Boolean/BooleanFormatterSettingsTest.php	Tests the Boolean field formatter settings.
BooleanFormatterSettingsTest		class	Drupal\Tests\field\Functional\Boolean	core/modules/field/tests/src/Functional/Boolean/BooleanFormatterSettingsTest.php	Tests the Boolean field formatter settings.
BooleanFormatterTest		class	Drupal\Tests\field\Kernel\Boolean	core/modules/field/tests/src/Kernel/Boolean/BooleanFormatterTest.php	Tests the boolean formatter.
BooleanInterface		interface	Drupal\Core\TypedData\Type	core/lib/Drupal/Core/TypedData/Type/BooleanInterface.php	Interface for boolean data.	1	4
BooleanItem		class	Drupal\Core\Field\Plugin\Field\FieldType	core/lib/Drupal/Core/Field/Plugin/Field/FieldType/BooleanItem.php	Defines the 'boolean' entity field type.	1	6
BooleanItemNormalizer		class	Drupal\test_fieldtype_boolean_emoji_normalizer\Normalizer	core/modules/serialization/tests/modules/test_fieldtype_boolean_emoji_normalizer/src/Normalizer/BooleanItemNormalizer.php	Normalizes boolean fields weirdly: renders them as 👍 (TRUE) or 👎 (FALSE).			2
BooleanItemTest		class	Drupal\Tests\field\Kernel\Boolean	core/modules/field/tests/src/Kernel/Boolean/BooleanItemTest.php	Tests the new entity API for the boolean field type.
BooleanNormalizer		class	Drupal\test_datatype_boolean_emoji_normalizer\Normalizer	core/modules/serialization/tests/modules/test_datatype_boolean_emoji_normalizer/src/Normalizer/BooleanNormalizer.php	Normalizes boolean data weirdly: renders them as 👍 (TRUE) or 👎 (FALSE).			2
BooleanOperator		class	Drupal\views\Plugin\views\filter	core/modules/views/src/Plugin/views/filter/BooleanOperator.php	Simple filter to handle matching of boolean values.	3	2
BooleanOperatorString		class	Drupal\views\Plugin\views\filter	core/modules/views/src/Plugin/views/filter/BooleanOperatorString.php	Simple filter to handle matching of boolean values.
BootableCommandTrait		trait	Drupal\Core\Command	core/lib/Drupal/Core/Command/BootableCommandTrait.php	Contains helper methods for console commands that boot up Drupal.		2
BootstrapConfigStorageFactory		class	Drupal\Core\Config	core/lib/Drupal/Core/Config/BootstrapConfigStorageFactory.php	Defines a factory for retrieving the config storage used pre-kernel.		2
BootstrapErrorHandler		final class	Drupal\TestTools\ErrorHandler	core/tests/Drupal/TestTools/ErrorHandler/BootstrapErrorHandler.php	Drupal's PHPUnit base error handler.		1
Box		class	Drupal\block_content\Plugin\migrate\source\d6	core/modules/block_content/src/Plugin/migrate/source/d6/Box.php	Drupal 6 block source from database.
BoxTest		class	Drupal\Tests\block_content\Kernel\Plugin\migrate\source\d6	core/modules/block_content/tests/src/Kernel/Plugin/migrate/source/d6/BoxTest.php	Tests D6 block boxes source plugin.
BoxTranslation		class	Drupal\block_content\Plugin\migrate\source\d6	core/modules/block_content/src/Plugin/migrate/source/d6/BoxTranslation.php	Drupal 6 i18n content block translations source from database.
BoxTranslationTest		class	Drupal\Tests\block_content\Kernel\Plugin\migrate\source\d6	core/modules/block_content/tests/src/Kernel/Plugin/migrate/source/d6/BoxTranslationTest.php	Tests i18n content block translations source plugin.
Breadcrumb		class	Drupal\Core\Breadcrumb	core/lib/Drupal/Core/Breadcrumb/Breadcrumb.php	Used to return generated breadcrumbs with associated cacheability metadata.		12
Breadcrumb404Test		class	Drupal\FunctionalTests\Breadcrumb	core/tests/Drupal/FunctionalTests/Breadcrumb/Breadcrumb404Test.php	Tests the breadcrumb of 404 pages.
BreadcrumbBuilderInterface		interface	Drupal\Core\Breadcrumb	core/lib/Drupal/Core/Breadcrumb/BreadcrumbBuilderInterface.php	Defines an interface for classes that build breadcrumbs.	7	7
BreadcrumbFrontCacheContextsTest		class	Drupal\Tests\system\Functional\Menu	core/modules/system/tests/src/Functional/Menu/BreadcrumbFrontCacheContextsTest.php	Tests breadcrumbs functionality.
BreadcrumbManager		class	Drupal\Core\Breadcrumb	core/lib/Drupal/Core/Breadcrumb/BreadcrumbManager.php	Provides a breadcrumb manager.		1
BreadcrumbManagerTest		class	Drupal\Tests\Core\Breadcrumb	core/tests/Drupal/Tests/Core/Breadcrumb/BreadcrumbManagerTest.php	@coversDefaultClass \Drupal\Core\Breadcrumb\BreadcrumbManager @group Breadcrumb
BreadcrumbTest		class	Drupal\Tests\Core\Breadcrumb	core/tests/Drupal/Tests/Core/Breadcrumb/BreadcrumbTest.php	@coversDefaultClass \Drupal\Core\Breadcrumb\Breadcrumb @group Breadcrumb
BreadcrumbTest		class	Drupal\Tests\system\Functional\Menu	core/modules/system/tests/src/Functional/Menu/BreadcrumbTest.php	Tests breadcrumbs functionality.
BreakLockForm		class	Drupal\views_ui\Form	core/modules/views_ui/src/Form/BreakLockForm.php	Builds the form to break the lock of an edited view.
BreakLockLink		class	Drupal\Core\TempStore\Element	core/lib/Drupal/Core/TempStore/Element/BreakLockLink.php	Provides a link to break a tempstore lock.
Breakpoint		class	Drupal\breakpoint	core/modules/breakpoint/src/Breakpoint.php	Default object used for breakpoint plugins.		1
BreakpointDiscoveryTest		class	Drupal\Tests\breakpoint\Kernel	core/modules/breakpoint/tests/src/Kernel/BreakpointDiscoveryTest.php	Tests discovery of breakpoints provided by themes and modules.
BreakpointHooks		class	Drupal\breakpoint\Hook	core/modules/breakpoint/src/Hook/BreakpointHooks.php	Hook implementations for breakpoint.
BreakpointInterface		interface	Drupal\breakpoint	core/modules/breakpoint/src/BreakpointInterface.php	Interface for Breakpoint plugins.	1	1
BreakpointManager		class	Drupal\breakpoint	core/modules/breakpoint/src/BreakpointManager.php	Defines a breakpoint plugin manager to deal with breakpoints.			2
BreakpointManagerInterface		interface	Drupal\breakpoint	core/modules/breakpoint/src/BreakpointManagerInterface.php	Defines an interface for breakpoint managers.	1	1
BreakpointTest		class	Drupal\Tests\breakpoint\Unit	core/modules/breakpoint/tests/src/Unit/BreakpointTest.php	@coversDefaultClass \Drupal\breakpoint\Breakpoint @group Breakpoint
Broccoli		class	Drupal\Tests\Component\Plugin\Fixtures\vegetable	core/tests/Drupal/Tests/Component/Plugin/Fixtures/vegetable/Broccoli.php	Plugin annotation @Plugin( id = "broccoli", label = "Broccoli", color = "green" )		1
Broken		class	Drupal\Core\Entity\Plugin\EntityReferenceSelection	core/lib/Drupal/Core/Entity/Plugin/EntityReferenceSelection/Broken.php	Defines a fallback plugin for missing entity_reference selection plugins.
Broken		class	Drupal\Core\Block\Plugin\Block	core/lib/Drupal/Core/Block/Plugin/Block/Broken.php	Defines a fallback plugin for missing block plugins.		2
Broken		class	Drupal\views\Plugin\views\sort	core/modules/views/src/Plugin/views/sort/Broken.php	A special handler to take the place of missing or broken handlers.
Broken		class	Drupal\views\Plugin\views\field	core/modules/views/src/Plugin/views/field/Broken.php	A special handler to take the place of missing or broken handlers.		1
Broken		class	Drupal\views\Plugin\views\relationship	core/modules/views/src/Plugin/views/relationship/Broken.php	A special handler to take the place of missing or broken handlers.
Broken		class	Drupal\views\Plugin\views\filter	core/modules/views/src/Plugin/views/filter/Broken.php	A special handler to take the place of missing or broken handlers.		2
Broken		class	Drupal\views\Plugin\views\area	core/modules/views/src/Plugin/views/area/Broken.php	A special handler to take the place of missing or broken handlers.		1
Broken		class	Drupal\views\Plugin\views\argument	core/modules/views/src/Plugin/views/argument/Broken.php	A special handler to take the place of missing or broken handlers.
BrokenCacheUpdateTest		class	Drupal\Tests\system\Functional\UpdateSystem	core/modules/system/tests/src/Functional/UpdateSystem/BrokenCacheUpdateTest.php	Ensures that a broken or out-of-date element info cache is not used.
BrokenHandlerTrait		trait	Drupal\views\Plugin\views	core/modules/views/src/Plugin/views/BrokenHandlerTrait.php	A Trait for Views broken handlers.		6
BrokenInboundPathProcessor		class	Drupal\update_script_test\PathProcessor	core/modules/system/tests/modules/update_script_test/src/PathProcessor/BrokenInboundPathProcessor.php	Example path processor which breaks on inbound.			2
BrokenPostRequestException		class	Drupal\Core\Form\Exception	core/lib/Drupal/Core/Form/Exception/BrokenPostRequestException.php	Defines an exception used, when the POST HTTP body is broken.		4
BrokenSystemTestController		class	Drupal\system_test\Controller	core/modules/system/tests/modules/system_test/src/Controller/BrokenSystemTestController.php	A controller that does not specify its autowired dependencies correctly.		1
BrokenToolkit		class	Drupal\image_test\Plugin\ImageToolkit	core/modules/system/tests/modules/image_test/src/Plugin/ImageToolkit/BrokenToolkit.php	Defines a Test toolkit for image manipulation within Drupal.
BrowserHtmlDebugTrait		trait	Drupal\Tests	core/tests/Drupal/Tests/BrowserHtmlDebugTrait.php	Provides the debug functions for browser tests.

Other projects

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