Classes, traits, and interfaces - Drupal 11.1.x - Drupal Core

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
ReturnTypeNode		final class	Prophecy\Doubler\Generator\Node	vendor/phpspec/prophecy/src/Prophecy/Doubler/Generator/Node/ReturnTypeNode.php			4
ReturnValueGenerator		final class	PHPUnit\Framework\MockObject	vendor/phpunit/phpunit/src/Framework/MockObject/Runtime/ReturnValueGenerator.php	@no-named-arguments Parameter names are not covered by the backward compatibility promise for PHPUnit
ReturnValueMap		final class	PHPUnit\Framework\MockObject\Stub	vendor/phpunit/phpunit/src/Framework/MockObject/Runtime/Stub/ReturnValueMap.php	@no-named-arguments Parameter names are not covered by the backward compatibility promise for PHPUnit		3
ReturnValueNotConfiguredException		final class	PHPUnit\Framework\MockObject	vendor/phpunit/phpunit/src/Framework/MockObject/Exception/ReturnValueNotConfiguredException.php	@no-named-arguments Parameter names are not covered by the backward compatibility promise for PHPUnit
Return_		class	PhpParser\Node\Stmt	vendor/nikic/php-parser/lib/PhpParser/Node/Stmt/Return_.php			1
Return_		final class	phpDocumentor\Reflection\DocBlock\Tags	vendor/phpdocumentor/reflection-docblock/src/DocBlock/Tags/Return_.php	Reflection class for a {return tag in a Docblock.		2
Revealer		class	Prophecy\Prophecy	vendor/phpspec/prophecy/src/Prophecy/Prophecy/Revealer.php	Basic prophecies revealer.		1
RevealerInterface		interface	Prophecy\Prophecy	vendor/phpspec/prophecy/src/Prophecy/Prophecy/RevealerInterface.php	Prophecies revealer interface.	1	1
ReverseContainer		final class	Drupal\Component\DependencyInjection	core/lib/Drupal/Component/DependencyInjection/ReverseContainer.php	Retrieves service IDs from the container for public services.		3
ReverseContainer		final class	Symfony\Component\DependencyInjection	vendor/symfony/dependency-injection/ReverseContainer.php	Turns public and "container.reversible" services back to their ids.
ReverseEmulator		final class	PhpParser\Lexer\TokenEmulator	vendor/nikic/php-parser/lib/PhpParser/Lexer/TokenEmulator/ReverseEmulator.php	Reverses emulation direction of the inner emulator.		1
ReverseProxyMiddleware		class	Drupal\Core\StackMiddleware	core/lib/Drupal/Core/StackMiddleware/ReverseProxyMiddleware.php	Provides support for reverse proxies.		2
RevertOverridesForm		class	Drupal\layout_builder\Form	core/modules/layout_builder/src/Form/RevertOverridesForm.php	Reverts the overridden layout to the defaults.
ReviewForm		class	Drupal\migrate_drupal_ui\Form	core/modules/migrate_drupal_ui/src/Form/ReviewForm.php	Migrate Upgrade review form.			1
RevisionableContentEntityBase		abstract class	Drupal\Core\Entity	core/lib/Drupal/Core/Entity/RevisionableContentEntityBase.php	Provides a content entity with extended support for revisions.
RevisionableEntityBundleInterface		interface	Drupal\Core\Entity	core/lib/Drupal/Core/Entity/RevisionableEntityBundleInterface.php	Provides an interface defining a revisionable entity bundle.	4	5
RevisionableInterface		interface	Drupal\Core\Entity	core/lib/Drupal/Core/Entity/RevisionableInterface.php	Provides methods for an entity to support revisions.	2	16
RevisionableStorageInterface		interface	Drupal\Core\Entity	core/lib/Drupal/Core/Entity/RevisionableStorageInterface.php	A storage that supports revisionable entity types.	1	3
RevisionDeleteForm		class	Drupal\Core\Entity\Form	core/lib/Drupal/Core/Entity/Form/RevisionDeleteForm.php	Provides a form for deleting an entity revision.		3
RevisionHtmlRouteProvider		class	Drupal\Core\Entity\Routing	core/lib/Drupal/Core/Entity/Routing/RevisionHtmlRouteProvider.php	Provides entity revision routes.		3
RevisionLink		class	Drupal\node\Plugin\views\field	core/modules/node/src/Plugin/views/field/RevisionLink.php	Field handler to present a link to a node revision.	2
RevisionLinkDelete		class	Drupal\node\Plugin\views\field	core/modules/node/src/Plugin/views/field/RevisionLinkDelete.php	Field handler to present link to delete a node revision.
RevisionLinkRevert		class	Drupal\node\Plugin\views\field	core/modules/node/src/Plugin/views/field/RevisionLinkRevert.php	Field handler to present a link to revert a node to a revision.
RevisionLogEntityTrait		trait	Drupal\Core\Entity	core/lib/Drupal/Core/Entity/RevisionLogEntityTrait.php	Provides a trait for accessing revision logging and ownership information.
RevisionLogInterface		interface	Drupal\Core\Entity	core/lib/Drupal/Core/Entity/RevisionLogInterface.php	Defines methods for an entity that supports revision logging and ownership.	7	11
RevisionRevertForm		class	Drupal\Core\Entity\Form	core/lib/Drupal/Core/Entity/Form/RevisionRevertForm.php	Provides a form for reverting an entity revision.		3
RewindableGenerator		class	Symfony\Component\DependencyInjection\Argument	vendor/symfony/dependency-injection/Argument/RewindableGenerator.php	@internal		5
Rfc2231Encoder		final class	Symfony\Component\Mime\Encoder	vendor/symfony/mime/Encoder/Rfc2231Encoder.php	@author Chris Corbyn		1
Rfc3339		class	JsonSchema	vendor/justinrainbow/json-schema/src/JsonSchema/Rfc3339.php			1
Rfc7230		final class	GuzzleHttp\Psr7	vendor/guzzlehttp/psr7/src/Rfc7230.php	@internal
RfcComplianceException		class	Symfony\Component\Mime\Exception	vendor/symfony/mime/Exception/RfcComplianceException.php	@author Fabien Potencier <fabien@symfony.com>	1	5
RfcLoggerTrait		trait	Drupal\Core\Logger	core/lib/Drupal/Core/Logger/RfcLoggerTrait.php	A copy of \Psr\Log\LoggerTrait that uses RFC 5424 compliant log levels.		2
RfcLogLevel		class	Drupal\Core\Logger	core/lib/Drupal/Core/Logger/RfcLogLevel.php	Defines various logging severity levels.		5
RFCValidation		class	Egulias\EmailValidator\Validation	vendor/egulias/email-validator/src/Validation/RFCValidation.php		1	2
RFCWarnings		class	Egulias\EmailValidator\Result\Reason	vendor/egulias/email-validator/src/Result/Reason/RFCWarnings.php			1
Risky		final class	PHPUnit\Framework\TestStatus	vendor/phpunit/phpunit/src/Framework/TestStatus/Risky.php	@psalm-immutable
Role		class	Drupal\user\Entity	core/modules/user/src/Entity/Role.php	Defines the user role entity class.		15	1
Role		class	Drupal\user\Plugin\views\access	core/modules/user/src/Plugin/views/access/Role.php	Access plugin that provides role-based access control.
Role		class	Drupal\user\Plugin\migrate\source\d6	core/modules/user/src/Plugin/migrate/source/d6/Role.php	Drupal 6 role source from database.
Role		class	Drupal\user\Plugin\migrate\source\d7	core/modules/user/src/Plugin/migrate/source/d7/Role.php	Drupal 7 role source from database.
RoleAccessCheck		class	Drupal\user\Access	core/modules/user/src/Access/RoleAccessCheck.php	Determines access to routes based on roles.			2
RoleAccessControlHandler		class	Drupal\user	core/modules/user/src/RoleAccessControlHandler.php	Defines the access control handler for the user role entity type.		1
RoleForm		class	Drupal\user	core/modules/user/src/RoleForm.php	Form controller for the role entity edit forms.		1
RoleInterface		interface	Drupal\user	core/modules/user/src/RoleInterface.php	Provides an interface defining a user role entity.	1	22
RoleListBuilder		class	Drupal\user	core/modules/user/src/RoleListBuilder.php	Defines a class to build a listing of user role entities.		1
Roles		class	Drupal\user\Plugin\views\filter	core/modules/user/src/Plugin/views/filter/Roles.php	Filter handler for user roles.
Roles		class	Drupal\user\Plugin\views\field	core/modules/user/src/Plugin/views/field/Roles.php	Field handler to provide a list of roles.
RoleSettingsForm		class	Drupal\user\Form	core/modules/user/src/Form/RoleSettingsForm.php	Configure administrator role settings for this site.			1
RolesLookup		class	Drupal\block\Plugin\migrate\process	core/modules/block/src/Plugin/migrate/process/RolesLookup.php	Gets the destination roles ID for an array of source roles IDs.
RolesRid		class	Drupal\user\Plugin\views\argument	core/modules/user/src/Plugin/views/argument/RolesRid.php	Allow role ID(s) as argument.