Classes, traits, and interfaces - main - 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 1529

Name	Deprecated	Object type	Namespace	File name	Summary	Direct uses	Use statements	Strings
QuickStartCommand		class	Drupal\Core\Command	core/lib/Drupal/Core/Command/QuickStartCommand.php	Installs a Drupal site and starts a webserver for local testing/development.
QuickStartTest		class	Drupal\BuildTests\QuickStart	core/tests/Drupal/BuildTests/QuickStart/QuickStartTest.php	Tests the quick-start commands.
QuickStartTestBase		abstract class	Drupal\BuildTests\QuickStart	core/tests/Drupal/BuildTests/QuickStart/QuickStartTestBase.php	Helper methods for using the quickstart feature of Drupal.	3	3
QuxTest		abstract class	Drupal\Tests\Core\Foo	core/tests/PHPStan/fixtures/test-classes-with-metadata.php
Radio		class	Drupal\Core\Render\Element	core/lib/Drupal/Core/Render/Element/Radio.php	Provides a form element for a single radio button.
Radios		class	Drupal\Core\Render\Element	core/lib/Drupal/Core/Render/Element/Radios.php	Provides a form element for a set of radio buttons.		1
Random		abstract class	Drupal\TestTools	core/tests/Drupal/TestTools/Random.php	Provides random generator utility static methods.		20
Random		class	Drupal\views\Plugin\views\sort	core/modules/views/src/Plugin/views/sort/Random.php	Handle a random sort.
Random		class	Drupal\Component\Utility	core/lib/Drupal/Component/Utility/Random.php	Defines a utility class for creating random data.		30	1
RandomGeneratorTrait		trait	Drupal\Tests	core/tests/Drupal/Tests/RandomGeneratorTrait.php	Provides random generator utility methods.		3
RandomTest		class	Drupal\Tests\Component\Utility	core/tests/Drupal/Tests/Component/Utility/RandomTest.php	Tests random data generation.
Range		class	Drupal\Core\Render\Element	core/lib/Drupal/Core/Render/Element/Range.php	Provides a slider for input of a number within a specific range.
RangeConstraint		class	Drupal\Core\Validation\Plugin\Validation\Constraint	core/lib/Drupal/Core/Validation/Plugin/Validation/Constraint/RangeConstraint.php	Range constraint.	1	1
RangeConstraintValidator		class	Drupal\Core\Validation\Plugin\Validation\Constraint	core/lib/Drupal/Core/Validation/Plugin/Validation/Constraint/RangeConstraintValidator.php	Validator for the Drupal 'range' constraint.	1	1
RangeQueryTest		class	Drupal\KernelTests\Core\Database	core/tests/Drupal/KernelTests/Core/Database/RangeQueryTest.php	Tests the Range query functionality.
Raw		class	Drupal\views\Plugin\views\argument_default	core/modules/views/src/Plugin/views/argument_default/Raw.php	Default argument plugin to use the raw value from the URL.		1
RawConfigWriterTrait		trait	Drupal\Tests\Traits\Core\Config	core/tests/Drupal/Tests/Traits/Core/Config/RawConfigWriterTrait.php	Allows writing raw config data for testing purposes.		1
RawStringFormatterTest		class	Drupal\Tests\field\Kernel\KernelString	core/modules/field/tests/src/Kernel/KernelString/RawStringFormatterTest.php	Tests the raw string formatter.
RawTest		class	Drupal\Tests\views\Unit\Plugin\argument_default	core/modules/views/tests/src/Unit/Plugin/argument_default/RawTest.php	Tests Drupal\views\Plugin\views\argument_default\Raw.
ReadOnlyException		class	Drupal\Core\TypedData\Exception	core/lib/Drupal/Core/TypedData/Exception/ReadOnlyException.php	Exception thrown when trying to write or set ready-only data.
ReadOnlyModeMethodFilter		class	Drupal\jsonapi\Routing	core/modules/jsonapi/src/Routing/ReadOnlyModeMethodFilter.php	Filters routes based on the HTTP method and JSON:API's read-only mode.			2
ReadOnlyStorage		class	Drupal\Core\Config	core/lib/Drupal/Core/Config/ReadOnlyStorage.php	A ReadOnlyStorage decorates a storage and does not allow writing to it.		1
ReadOnlyStorageTest		class	Drupal\Tests\Core\Config	core/tests/Drupal/Tests/Core/Config/ReadOnlyStorageTest.php	Tests Drupal\Core\Config\ReadOnlyStorage.
ReadOnlyStream		abstract class	Drupal\Core\StreamWrapper	core/lib/Drupal/Core/StreamWrapper/ReadOnlyStream.php	Defines a read-only Drupal stream wrapper base class.	1	1
ReadOnlyStreamWrapperTest		class	Drupal\KernelTests\Core\File	core/tests/Drupal/KernelTests/Core/File/ReadOnlyStreamWrapperTest.php	Tests the read-only stream wrapper write functions.
Rearrange		class	Drupal\views_ui\Form\Ajax	core/modules/views_ui/src/Form/Ajax/Rearrange.php	Provides a rearrange form for Views handlers.
RearrangeFieldsTest		class	Drupal\Tests\views_ui\Functional	core/modules/views_ui/tests/src/Functional/RearrangeFieldsTest.php	Tests the reordering of fields via AJAX.
RearrangeFilter		class	Drupal\views_ui\Form\Ajax	core/modules/views_ui/src/Form/Ajax/RearrangeFilter.php	Provides a rearrange form for Views filters.		1
RearrangeFilterTest		class	Drupal\Tests\views_ui\Unit\Form\Ajax	core/modules/views_ui/tests/src/Unit/Form/Ajax/RearrangeFilterTest.php	Unit tests for Views UI module functions.
RebuildPermissionsForm		class	Drupal\node\Form	core/modules/node/src/Form/RebuildPermissionsForm.php	Form for rebuilding permissions.			1
RebuildScriptTest		class	Drupal\Tests\system\Functional\UpdateSystem	core/modules/system/tests/src/Functional/UpdateSystem/RebuildScriptTest.php	Tests the rebuild script access and functionality.
RebuildTest		class	Drupal\Tests\system\Functional\Form	core/modules/system/tests/src/Functional/Form/RebuildTest.php	Tests functionality of \Drupal\Core\Form\FormBuilderInterface::rebuildForm().
RebuildTest		class	Drupal\Tests\system\FunctionalJavascript\Form	core/modules/system/tests/src/FunctionalJavascript/Form/RebuildTest.php	Tests functionality of \Drupal\Core\Form\FormBuilderInterface::rebuildForm().
Recipe		final class	Drupal\Core\Recipe	core/lib/Drupal/Core/Recipe/Recipe.php	@internal This API is experimental.		17
RecipeAppliedEvent		final class	Drupal\Core\Recipe	core/lib/Drupal/Core/Recipe/RecipeAppliedEvent.php	Event dispatched after a recipe has been applied.		1
RecipeCommand		final class	Drupal\Core\Recipe	core/lib/Drupal/Core/Recipe/RecipeCommand.php	Applies recipe.
RecipeCommand		final class	Drupal\Core\Recipe\Command	core/lib/Drupal/Core/Recipe/Command/RecipeCommand.php	Applies recipe.		1
RecipeCommandTest		class	Drupal\FunctionalTests\Core\Recipe	core/tests/Drupal/FunctionalTests/Core/Recipe/RecipeCommandTest.php	Tests recipe command.
RecipeConfigInstaller		final class	Drupal\Core\Recipe	core/lib/Drupal/Core/Recipe/RecipeConfigInstaller.php	Extends the ConfigInstaller service for recipes.
RecipeConfigStorageWrapper		final class	Drupal\Core\Recipe	core/lib/Drupal/Core/Recipe/RecipeConfigStorageWrapper.php	Merges two storages together.		1
RecipeConfigStorageWrapperTest		class	Drupal\Tests\Core\Recipe	core/tests/Drupal/Tests/Core/Recipe/RecipeConfigStorageWrapperTest.php	Tests Drupal\Core\Recipe\RecipeConfigStorageWrapper.
RecipeConfigurator		final class	Drupal\Core\Recipe	core/lib/Drupal/Core/Recipe/RecipeConfigurator.php	@internal This API is experimental.		1
RecipeConfiguratorTest		class	Drupal\KernelTests\Core\Recipe	core/tests/Drupal/KernelTests/Core/Recipe/RecipeConfiguratorTest.php	Tests Drupal\Core\Recipe\RecipeConfigurator.
RecipeEventsTest		class	Drupal\KernelTests\Core\Recipe	core/tests/Drupal/KernelTests/Core/Recipe/RecipeEventsTest.php	Tests Recipe Events.
RecipeFileException		final class	Drupal\Core\Recipe	core/lib/Drupal/Core/Recipe/RecipeFileException.php	@internal This API is experimental.		3
RecipeFormInputTest		class	Drupal\Tests\system\Functional\Form	core/modules/system/tests/src/Functional/Form/RecipeFormInputTest.php	Tests Recipe Form Input.
RecipeInfoCommand		final class	Drupal\Core\Recipe	core/lib/Drupal/Core/Recipe/RecipeInfoCommand.php	Shows information about a particular recipe.
RecipeInfoCommand		final class	Drupal\Core\Recipe\Command	core/lib/Drupal/Core/Recipe/Command/RecipeInfoCommand.php	Shows information about a particular recipe.
RecipeInputFormTrait		trait	Drupal\Core\Recipe	core/lib/Drupal/Core/Recipe/RecipeInputFormTrait.php	Defines helper methods for forms which collect input on behalf of recipes.		2
RecipeMissingExtensionsException		final class	Drupal\Core\Recipe	core/lib/Drupal/Core/Recipe/RecipeMissingExtensionsException.php	Exception thrown when recipes contain or depend on missing extensions.

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