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
NodeXmlAnonTest		class	Drupal\Tests\node\Functional\Rest	core/modules/node/tests/src/Functional/Rest/NodeXmlAnonTest.php	@group rest
NodeXmlBasicAuthTest		class	Drupal\Tests\node\Functional\Rest	core/modules/node/tests/src/Functional/Rest/NodeXmlBasicAuthTest.php	@group rest
NodeXmlCookieTest		class	Drupal\Tests\node\Functional\Rest	core/modules/node/tests/src/Functional/Rest/NodeXmlCookieTest.php	@group rest
NoFieldsException		class	Drupal\Core\Database\Query	core/lib/Drupal/Core/Database/Query/NoFieldsException.php	Exception thrown if an insert query doesn't specify insert or default fields.		1
NoHelpTest		class	Drupal\Tests\help\Functional	core/modules/help/tests/src/Functional/NoHelpTest.php	Verify no help is displayed for modules not providing any help.
NoJavaScriptAnonymousTest		class	Drupal\Tests\system\Functional\Common	core/modules/system/tests/src/Functional/Common/NoJavaScriptAnonymousTest.php	Tests that anonymous users are not served any JavaScript.
NoLanguageEntityTest		class	Drupal\language_test\Entity	core/modules/language/tests/language_test/src/Entity/NoLanguageEntityTest.php	Defines the test entity class.		1
NoMultilingualReviewPageTest		class	Drupal\Tests\rdf\Functional\Migrate	core/modules/rdf/tests/src/Functional/Migrate/NoMultilingualReviewPageTest.php	Tests review page.
NoMultilingualReviewPageTest		class	Drupal\Tests\color\Functional\Migrate	core/modules/color/tests/src/Functional/Migrate/NoMultilingualReviewPageTest.php	Tests review page.
NoMultilingualReviewPageTest		class	Drupal\Tests\migrate_drupal_ui\Functional\d6	core/modules/migrate_drupal_ui/tests/src/Functional/d6/NoMultilingualReviewPageTest.php	Tests migrate upgrade review page for Drupal 6 without translations.
NoMultilingualReviewPageTest		class	Drupal\Tests\migrate_drupal_ui\Functional\d7	core/modules/migrate_drupal_ui/tests/src/Functional/d7/NoMultilingualReviewPageTest.php	Tests Drupal 7 upgrade without translations.
NoMultilingualReviewPageTest		class	Drupal\Tests\aggregator\Functional\migrate_drupal_ui\d6	core/modules/aggregator/tests/src/Functional/migrate_drupal_ui/d6/NoMultilingualReviewPageTest.php	Tests migrate upgrade review page for Drupal 6 for the aggregator module.
NoMultilingualReviewPageTest		class	Drupal\Tests\aggregator\Functional\migrate_drupal_ui\d7	core/modules/aggregator/tests/src/Functional/migrate_drupal_ui/d7/NoMultilingualReviewPageTest.php	Tests Drupal 7 upgrade without translations for the aggregator module.
NoMultilingualReviewPageTestBase		abstract class	Drupal\Tests\migrate_drupal_ui\Functional	core/modules/migrate_drupal_ui/tests/src/Functional/NoMultilingualReviewPageTestBase.php	Tests the upgrade review form without translations.	7	7
NonAbstractFormStateDecoratorBase		class	Drupal\Tests\Core\Form	core/tests/Drupal/Tests/Core/Form/FormStateDecoratorBaseTest.php	Provides a non-abstract version of the class under test.
NonAnnotatedClass		class	Drupal\plugin_test\Plugin\plugin_test\fruit	core/modules/system/tests/modules/plugin_test/src/Plugin/plugin_test/fruit/NonAnnotatedClass.php
NonDefaultBlockAdminTest		class	Drupal\Tests\block\Functional	core/modules/block/tests/src/Functional/NonDefaultBlockAdminTest.php	Tests the block administration page for a non-default theme.
None		class	Drupal\views\Plugin\views\argument_validator	core/modules/views/src/Plugin/views/argument_validator/None.php	Do not validate the argument.
None		class	Drupal\views\Plugin\views\cache	core/modules/views/src/Plugin/views/cache/None.php	Caching plugin that provides no caching at all.		1
None		class	Drupal\views\Plugin\views\access	core/modules/views/src/Plugin/views/access/None.php	Access plugin that provides no access control at all.
None		class	Drupal\views\Plugin\views\pager	core/modules/views/src/Plugin/views/pager/None.php	Plugin for views without pagers.		1
NonInheritingBundleClass		class	Drupal\entity_test_bundle_class\Entity	core/modules/system/tests/modules/entity_test_bundle_class/src/Entity/NonInheritingBundleClass.php	An invalid bundle class which does not inherit the main entity class.		1
NonPrintable		class	Drupal\KernelTests\Core\Theme	core/tests/Drupal/KernelTests/Core/Theme/ThemeRenderAndAutoescapeTest.php
NonStableModulesTest		class	Drupal\Tests\system\Functional\Module	core/modules/system/tests/src/Functional/Module/NonStableModulesTest.php	Tests the installation of deprecated and experimental modules.
NoOptimizeCacheContext		class	Drupal\Tests\Core\Cache\Context	core/tests/Drupal/Tests/Core/Cache/Context/CacheContextsManagerTest.php	Non-optimizable context class.
NoPreExistingSchemaUpdateTest		class	Drupal\Tests\system\Functional\UpdateSystem	core/modules/system/tests/src/Functional/UpdateSystem/NoPreExistingSchemaUpdateTest.php	Tries to update a module which has no pre-existing schema.
NoProfilesException		class	Drupal\Core\Installer\Exception	core/lib/Drupal/Core/Installer/Exception/NoProfilesException.php	Exception thrown if no installation profiles are available.		1
NormalInstallerServiceProvider		class	Drupal\Core\Installer	core/lib/Drupal/Core/Installer/NormalInstallerServiceProvider.php	Service provider for the installer environment.	1
NormalizerBase		abstract class	Drupal\hal\Normalizer	core/modules/hal/src/Normalizer/NormalizerBase.php	Base class for Normalizers.	2
NormalizerBase		abstract class	Drupal\jsonapi\Normalizer	core/modules/jsonapi/src/Normalizer/NormalizerBase.php	Base normalizer used in all JSON:API normalizers.	10
NormalizerBase		abstract class	Drupal\serialization\Normalizer	core/modules/serialization/src/Normalizer/NormalizerBase.php	Base class for Normalizers.	13	6
NormalizerBaseTest		class	Drupal\Tests\serialization\Unit\Normalizer	core/modules/serialization/tests/src/Unit/Normalizer/NormalizerBaseTest.php	@coversDefaultClass \Drupal\serialization\Normalizer\NormalizerBase[[api-linebreak]] @group serialization
NormalizerTestBase		abstract class	Drupal\Tests\serialization\Kernel	core/modules/serialization/tests/src/Kernel/NormalizerTestBase.php	Helper base class to set up some test fields for serialization testing.	4	2
NormalizerTestBase		abstract class	Drupal\Tests\hal\Kernel	core/modules/hal/tests/src/Kernel/NormalizerTestBase.php	Test the HAL normalizer.	4
NormalizeTest		class	Drupal\Tests\hal\Kernel	core/modules/hal/tests/src/Kernel/NormalizeTest.php	Tests HAL normalization edge cases for EntityResource.
NoSerializationClassTestResource		class	Drupal\rest_test\Plugin\rest\resource	core/modules/rest/tests/modules/rest_test/src/Plugin/rest/resource/NoSerializationClassTestResource.php	Class used to test that serialization_class is optional.
NoServerError		class	Drupal\Core\PageCache\ResponsePolicy	core/lib/Drupal/Core/PageCache/ResponsePolicy/NoServerError.php	A policy denying caching of a server error (HTTP 5xx) responses.			2
NoSessionOpen		class	Drupal\Core\PageCache\RequestPolicy	core/lib/Drupal/Core/PageCache/RequestPolicy/NoSessionOpen.php	A policy allowing delivery of cached pages when there is no session open.		2
NoSessionOpenTest		class	Drupal\Tests\Core\PageCache	core/tests/Drupal/Tests/Core/PageCache/NoSessionOpenTest.php	@coversDefaultClass \Drupal\Core\PageCache\RequestPolicy\NoSessionOpen[[api-linebreak]] @group PageCache
NoSourceModule		class	Drupal\migration_provider_test\Plugin\migrate\source	core/modules/migrate_drupal_ui/tests/modules/migration_provider_test/src/Plugin/migrate/source/NoSourceModule.php	A test source plugin without a source_module.
NoSourcePluginDecorator		class	Drupal\migrate\Plugin	core/modules/migrate/src/Plugin/NoSourcePluginDecorator.php	Remove definitions which refer to a non-existing source plugin.
NotNullConstraint		class	Drupal\Core\Validation\Plugin\Validation\Constraint	core/lib/Drupal/Core/Validation/Plugin/Validation/Constraint/NotNullConstraint.php	NotNull constraint.		1
NotNullConstraintValidator		class	Drupal\Core\Validation\Plugin\Validation\Constraint	core/lib/Drupal/Core/Validation/Plugin/Validation/Constraint/NotNullConstraintValidator.php	NotNull constraint validator.
NotRegularDirectoryException		class	Drupal\Core\File\Exception	core/lib/Drupal/Core/File/Exception/NotRegularDirectoryException.php	Exception thrown when a target is not a regular directory (e.g. a file).		1
NotRegularFileException		class	Drupal\Core\File\Exception	core/lib/Drupal/Core/File/Exception/NotRegularFileException.php	Exception thrown when a target is not a regular file (e.g. a directory).		2
NoType		class	Drupal\action_test\Plugin\Action	core/modules/system/tests/modules/action_test/src/Plugin/Action/NoType.php	Provides an operation with no type specified.
NoUniqueFieldException		class	Drupal\Core\Database\Query	core/lib/Drupal/Core/Database/Query/NoUniqueFieldException.php	Exception thrown if an upsert query doesn't specify a unique field.
NullArgument		class	Drupal\views\Plugin\views\argument	core/modules/views/src/Plugin/views/argument/NullArgument.php	Argument handler that ignores the argument.
NullBackend		class	Drupal\Core\Cache	core/lib/Drupal/Core/Cache/NullBackend.php	Defines a stub cache implementation.	1	10
NullBackendFactory		class	Drupal\Core\Cache	core/lib/Drupal/Core/Cache/NullBackendFactory.php				4

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