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 1531

Name	Deprecated	Object type	Namespace	File name	Summary	Direct uses	Use statements	Strings
Connection		abstract class	Drupal\Core\Database	core/lib/Drupal/Core/Database/Connection.php	Base Database API class.	5	139	3
ConnectionFailureTest		class	Drupal\Tests\dblog\Kernel	core/modules/dblog/tests/src/Kernel/ConnectionFailureTest.php	Tests logging of connection failures.
ConnectionNotDefinedException		class	Drupal\Core\Database	core/lib/Drupal/Core/Database/ConnectionNotDefinedException.php	Exception thrown if an undefined database connection is requested.		8
ConnectionTest		class	Drupal\Tests\mysqli\Kernel\mysqli	core/modules/mysqli/tests/src/Kernel/mysqli/ConnectionTest.php	MySQL-specific connection tests.
ConnectionTest		class	Drupal\Tests\Core\Database	core/tests/Drupal/Tests/Core/Database/ConnectionTest.php	Tests the Connection class.
ConnectionTest		class	Drupal\KernelTests\Core\Database	core/tests/Drupal/KernelTests/Core/Database/ConnectionTest.php	Tests of the core database system.
ConnectionTest		class	Drupal\Tests\sqlite\Unit	core/modules/sqlite/tests/src/Unit/ConnectionTest.php	Tests Drupal\sqlite\Driver\Database\sqlite\Connection.
ConnectionTest		class	Drupal\Tests\mysql\Unit	core/modules/mysql/tests/src/Unit/ConnectionTest.php	Tests MySQL database connections.
ConnectionTest		class	Drupal\Tests\mysql\Kernel\mysql	core/modules/mysql/tests/src/Kernel/mysql/ConnectionTest.php	MySQL-specific connection tests.	1	1
ConnectionUnitTest		class	Drupal\Tests\mysql\Kernel\mysql	core/modules/mysql/tests/src/Kernel/mysql/ConnectionUnitTest.php	MySQL-specific connection unit tests.	1	1
ConnectionUnitTest		class	Drupal\Tests\mysqli\Kernel\mysqli	core/modules/mysqli/tests/src/Kernel/mysqli/ConnectionUnitTest.php	MySQL-specific connection unit tests.
ConnectionUnitTest		class	Drupal\Tests\pgsql\Kernel\pgsql	core/modules/pgsql/tests/src/Kernel/pgsql/ConnectionUnitTest.php	PostgreSQL-specific connection unit tests.
ConsoleInputCollector		final class	Drupal\Core\Recipe	core/lib/Drupal/Core/Recipe/ConsoleInputCollector.php	Collects input values for recipes from the command line.		1
Constraint		class	Drupal\Core\Validation\Attribute	core/lib/Drupal/Core/Validation/Attribute/Constraint.php	Defines a Constraint attribute object.		94
Constraint		class	Drupal\Core\Validation\Annotation	core/lib/Drupal/Core/Validation/Annotation/Constraint.php	Defines a validation constraint annotation object.
Constraint		class	Drupal\Component\Version	core/lib/Drupal/Component/Version/Constraint.php	A value object representing a Drupal version constraint.		3
ConstraintFactory		class	Drupal\Core\Validation	core/lib/Drupal/Core/Validation/ConstraintFactory.php	Constraint plugin factory.		1
ConstraintFactoryTest		class	Drupal\KernelTests\Core\Validation	core/tests/Drupal/KernelTests/Core/Validation/ConstraintFactoryTest.php	Tests Drupal\Core\Validation\ConstraintFactory.
ConstraintManager		class	Drupal\Core\Validation	core/lib/Drupal/Core/Validation/ConstraintManager.php	Constraint plugin manager.		8	2
ConstraintTest		class	Drupal\Tests\Component\Version	core/tests/Drupal/Tests/Component/Version/ConstraintTest.php	Tests Drupal\Component\Version\Constraint.
ConstraintValidatorFactory		class	Drupal\Core\Validation	core/lib/Drupal/Core/Validation/ConstraintValidatorFactory.php	Defines a constraint validator factory that works with container injection.		3
ConstraintViolationBuilder		class	Drupal\Core\Validation	core/lib/Drupal/Core/Validation/ConstraintViolationBuilder.php	A constraint violation builder for the basic Symfony validator.
ContactCategory		class	Drupal\contact\Plugin\migrate\source	core/modules/contact/src/Plugin/migrate/source/ContactCategory.php	Drupal 6/7 contact category source from database.		1
ContactCategoryTest		class	Drupal\Tests\contact\Kernel\Plugin\migrate\source	core/modules/contact/tests/src/Kernel/Plugin/migrate/source/ContactCategoryTest.php	Tests D6 contact category source plugin.
ContactController		class	Drupal\contact\Controller	core/modules/contact/src/Controller/ContactController.php	Controller routines for contact routes.
ContactFieldsTest		class	Drupal\Tests\contact\Kernel\Views	core/modules/contact/tests/src/Kernel/Views/ContactFieldsTest.php	Tests that no storage is created for the contact_message entity.
ContactForm		class	Drupal\contact\Entity	core/modules/contact/src/Entity/ContactForm.php	Defines the contact form entity.		12
ContactFormAccessControlHandler		class	Drupal\contact	core/modules/contact/src/ContactFormAccessControlHandler.php	Defines the access control handler for the contact form entity type.		1
ContactFormEditForm		class	Drupal\contact	core/modules/contact/src/ContactFormEditForm.php	Base form for contact form edit forms.		1
ContactFormHooks		class	Drupal\contact\Hook	core/modules/contact/src/Hook/ContactFormHooks.php	Form hook implementations for Contact module.
ContactFormInterface		interface	Drupal\contact	core/modules/contact/src/ContactFormInterface.php	Provides an interface defining a contact form entity.	1	5
ContactFormJsonAnonTest		class	Drupal\Tests\contact\Functional\Rest	core/modules/contact/tests/src/Functional/Rest/ContactFormJsonAnonTest.php	Tests Contact Form Json Anon.
ContactFormJsonBasicAuthTest		class	Drupal\Tests\contact\Functional\Rest	core/modules/contact/tests/src/Functional/Rest/ContactFormJsonBasicAuthTest.php	Tests Contact Form Json Basic Auth.
ContactFormJsonCookieTest		class	Drupal\Tests\contact\Functional\Rest	core/modules/contact/tests/src/Functional/Rest/ContactFormJsonCookieTest.php	Tests Contact Form Json Cookie.
ContactFormListBuilder		class	Drupal\contact	core/modules/contact/src/ContactFormListBuilder.php	Defines a class to build a listing of contact form entities.		1
ContactFormResourceTestBase		abstract class	Drupal\Tests\contact\Functional\Rest	core/modules/contact/tests/src/Functional/Rest/ContactFormResourceTestBase.php	Resource test base for the ContactForm entity.	6
ContactFormTest		class	Drupal\Tests\contact\Functional\Jsonapi	core/modules/contact/tests/src/Functional/Jsonapi/ContactFormTest.php	JSON:API integration test for the "ContactForm" config entity type.
ContactFormValidationTest		class	Drupal\Tests\contact\Kernel	core/modules/contact/tests/src/Kernel/ContactFormValidationTest.php	Tests validation of contact_form entities.
ContactFormXmlAnonTest		class	Drupal\Tests\contact\Functional\Rest	core/modules/contact/tests/src/Functional/Rest/ContactFormXmlAnonTest.php	Tests Contact Form Xml Anon.
ContactFormXmlBasicAuthTest		class	Drupal\Tests\contact\Functional\Rest	core/modules/contact/tests/src/Functional/Rest/ContactFormXmlBasicAuthTest.php	Tests Contact Form Xml Basic Auth.
ContactFormXmlCookieTest		class	Drupal\Tests\contact\Functional\Rest	core/modules/contact/tests/src/Functional/Rest/ContactFormXmlCookieTest.php	Tests Contact Form Xml Cookie.
ContactHooks		class	Drupal\contact\Hook	core/modules/contact/src/Hook/ContactHooks.php	Hook implementations for contact.		1
ContactLanguageTest		class	Drupal\Tests\contact\Functional	core/modules/contact/tests/src/Functional/ContactLanguageTest.php	Tests contact messages with language module.
ContactLink		class	Drupal\contact\Plugin\views\field	core/modules/contact/src/Plugin/views/field/ContactLink.php	Defines a field that links to the user contact page, if access is permitted.		1
ContactLinkTest		class	Drupal\Tests\contact\Unit	core/modules/contact/tests/src/Unit/ContactLinkTest.php	Tests Drupal\contact\Plugin\views\field\ContactLink.
ContactLinkTest		class	Drupal\Tests\contact\Functional\Views	core/modules/contact/tests/src/Functional/Views/ContactLinkTest.php	Tests the contact link field.
ContactMessageAccessControlHandler		class	Drupal\contact	core/modules/contact/src/ContactMessageAccessControlHandler.php	Defines the access control handler for the message form entity type.		1
ContactMessageResource		class	Drupal\contact\Plugin\rest\resource	core/modules/contact/src/Plugin/rest/resource/ContactMessageResource.php	Customizes the entity REST Resource plugin for Contact's Message entities.		1
ContactPageAccess		class	Drupal\contact\Access	core/modules/contact/src/Access/ContactPageAccess.php	Access check for contact_personal_page route.			2
ContactPersonalTest		class	Drupal\Tests\contact\Functional	core/modules/contact/tests/src/Functional/ContactPersonalTest.php	Tests personal contact form functionality.

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