Classes, traits, and interfaces - 10.3.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
ComponentsTwigExtension		final class	Drupal\Core\Template	core/lib/Drupal/Core/Template/ComponentsTwigExtension.php	The twig extension so Drupal can recognize the new code.			1
ComponentValidator		class	Drupal\Core\Theme\Component	core/lib/Drupal/Core/Theme/Component/ComponentValidator.php	Validates a component based on its definition and the component schema.		3	1
ComponentValidator		final class	Drupal\sdc\Component	core/modules/sdc/src/Component/ComponentValidator.php	Validates a component based on its definition and the component schema.		3
ComponentValidatorTest		final class	Drupal\Tests\sdc\Unit	core/modules/sdc/tests/src/Unit/ComponentValidatorTest.php	Unit tests for the component validation.
ComponentValidatorTest		class	Drupal\Tests\Core\Theme\Component	core/tests/Drupal/Tests/Core/Theme/Component/ComponentValidatorTest.php	Unit tests for the component validation.
Composer		class	Drupal\Core\Composer	core/lib/Drupal/Core/Composer/Composer.php	Provides static functions for composer script events.
Composer		class	Drupal\Composer	composer/Composer.php	Provides static functions for composer script events.		8
ComposerBuildTestBase		abstract class	Drupal\BuildTests\Composer	core/tests/Drupal/BuildTests/Composer/ComposerBuildTestBase.php	Base class for Composer build tests.	3	3
ComposerHookTest		class	Drupal\Tests\Composer\Plugin\Scaffold\Functional	core/tests/Drupal/Tests/Composer/Plugin/Scaffold/Functional/ComposerHookTest.php	Tests Composer Hooks that run scaffold operations.
ComposerIntegrationTest		class	Drupal\Tests	core/tests/Drupal/Tests/ComposerIntegrationTest.php	Tests Composer integration.
ComposerIntegrationTrait		trait	Drupal\Tests\Composer	core/tests/Drupal/Tests/Composer/ComposerIntegrationTrait.php	Some utility functions for testing the Composer integration.		2
ComposerPluginImplementsScaffoldEvents		class	Drupal\Tests\fixture\Composer\Plugin	core/tests/Drupal/Tests/Composer/Plugin/Scaffold/fixtures/composer-plugin-implements-scaffold-events/src/ComposerPluginImplementsScaffoldEvents.php	A fixture composer plugin implement Drupal scaffold events.
ComposerProjectTemplatesTest		class	Drupal\BuildTests\Composer\Template	core/tests/Drupal/BuildTests/Composer/Template/ComposerProjectTemplatesTest.php	Demonstrate that Composer project templates can be built as patched.
ComposerScaffoldCommand		class	Drupal\Composer\Plugin\Scaffold	composer/Plugin/Scaffold/ComposerScaffoldCommand.php	The "drupal:scaffold" command class.
ComposerTest		class	Drupal\Tests\Composer	core/tests/Drupal/Tests/Composer/ComposerTest.php	@coversDefaultClass \Drupal\Composer\Composer @group Composer
ComposerValidateTest		class	Drupal\BuildTests\Composer	core/tests/Drupal/BuildTests/Composer/ComposerValidateTest.php	@group Composer
CompositeConstraintBase		abstract class	Drupal\Core\Entity\Plugin\Validation\Constraint	core/lib/Drupal/Core/Entity/Plugin/Validation/Constraint/CompositeConstraintBase.php	Provides a base class for constraints validating multiple fields.	4	6
CompositeFormElementTrait		trait	Drupal\Core\Render\Element	core/lib/Drupal/Core/Render/Element/CompositeFormElementTrait.php	Provides a trait for radios, checkboxes, and similar composite form elements.
ComputedBundleFieldTest		class	Drupal\Tests\views\Kernel\Handler	core/modules/views/tests/src/Kernel/Handler/ComputedBundleFieldTest.php	Provides some integration tests for computed bundle fields.
ComputedFieldTest		class	Drupal\Tests\views\Kernel\Handler	core/modules/views/tests/src/Kernel/Handler/ComputedFieldTest.php	Provides some integration tests for the Field handler.
ComputedFileUrl		class	Drupal\file	core/modules/file/src/ComputedFileUrl.php	Computed file URL property class.		2
ComputedFileUrlTest		class	Drupal\Tests\file\Kernel	core/modules/file/tests/src/Kernel/ComputedFileUrlTest.php	@coversDefaultClass \Drupal\file\ComputedFileUrl
ComputedItemListTrait		trait	Drupal\Core\TypedData	core/lib/Drupal/Core/TypedData/ComputedItemListTrait.php	Provides common functionality for computed item lists.		7
ComputedReferenceTestFieldItemList		class	Drupal\entity_test\Plugin\Field	core/modules/system/tests/modules/entity_test/src/Plugin/Field/ComputedReferenceTestFieldItemList.php	A computed entity reference field item list.		2
ComputedString		class	Drupal\entity_test\TypedData	core/modules/system/tests/modules/entity_test/src/TypedData/ComputedString.php	A computed property for test strings.		2
ComputedTestBundleFieldItemList		class	Drupal\entity_test\Plugin\Field	core/modules/system/tests/modules/entity_test/src/Plugin/Field/ComputedTestBundleFieldItemList.php	A computed field item list for a bundle field.		1
ComputedTestCacheableIntegerItemList		class	Drupal\entity_test\Plugin\Field	core/modules/system/tests/modules/entity_test/src/Plugin/Field/ComputedTestCacheableIntegerItemList.php	Item list class for computed cacheable string field.		1
ComputedTestCacheableString		class	Drupal\entity_test\Plugin\DataType	core/modules/system/tests/modules/entity_test/src/Plugin/DataType/ComputedTestCacheableString.php	The string data type with cacheability metadata.
ComputedTestCacheableStringItem		class	Drupal\entity_test\Plugin\Field\FieldType	core/modules/system/tests/modules/entity_test/src/Plugin/Field/FieldType/ComputedTestCacheableStringItem.php	Defines the 'string' entity field type with cacheability metadata.
ComputedTestCacheableStringItemList		class	Drupal\entity_test\Plugin\Field	core/modules/system/tests/modules/entity_test/src/Plugin/Field/ComputedTestCacheableStringItemList.php	Item list class for computed cacheable string field.		2
ComputedTestFieldItemList		class	Drupal\entity_test\Plugin\Field	core/modules/system/tests/modules/entity_test/src/Plugin/Field/ComputedTestFieldItemList.php	A computed field item list.		2
Concat		class	Drupal\migrate\Plugin\migrate\process	core/modules/migrate/src/Plugin/migrate/process/Concat.php	Concatenates a set of strings.	1	2
ConcatTest		class	Drupal\Tests\migrate\Unit\process	core/modules/migrate/tests/src/Unit/process/ConcatTest.php	Tests the concat process plugin.
Condition		class	Drupal\Core\Entity\Query\Sql	core/lib/Drupal/Core/Entity/Query/Sql/Condition.php	Implements entity query conditions for SQL databases.	1	1
Condition		class	Drupal\Core\Entity\Query\Sql\pgsql	core/lib/Drupal/Core/Entity/Query/Sql/pgsql/Condition.php	Implements entity query conditions for PostgreSQL databases.
Condition		class	Drupal\Core\Entity\Query\Null	core/lib/Drupal/Core/Entity/Query/Null/Condition.php	Defines the condition class for the null entity query.
Condition		class	Drupal\Core\Entity\KeyValueStore\Query	core/lib/Drupal/Core/Entity/KeyValueStore/Query/Condition.php	Defines the condition class for the key value entity query.
Condition		class	Drupal\Core\Condition\Attribute	core/lib/Drupal/Core/Condition/Attribute/Condition.php	Defines a condition plugin attribute.		12
Condition		class	Drupal\Core\Condition\Annotation	core/lib/Drupal/Core/Condition/Annotation/Condition.php	Defines a condition plugin annotation object.
Condition		class	Drupal\Core\Config\Entity\Query	core/lib/Drupal/Core/Config/Entity/Query/Condition.php	Defines the condition class for the config entity query.	1	1
Condition		class	Drupal\Core\Database\Query	core/lib/Drupal/Core/Database/Query/Condition.php	Generic class for a series of conditions in a query.	2	9
Condition		class	Drupal\core_fake\Driver\Database\CoreFakeWithAllCustomClasses	core/tests/fixtures/database_drivers/module/core_fake/src/Driver/Database/CoreFakeWithAllCustomClasses/Condition.php	CoreFakeWithAllCustomClasses implementation of \Drupal\Core\Database\Condition.
ConditionAccessResolverTrait		trait	Drupal\Core\Condition	core/lib/Drupal/Core/Condition/ConditionAccessResolverTrait.php	Resolves a set of conditions.		1
ConditionAccessResolverTraitTest		class	Drupal\Tests\Core\Condition	core/tests/Drupal/Tests/Core/Condition/ConditionAccessResolverTraitTest.php	@coversDefaultClass \Drupal\Core\Condition\ConditionAccessResolverTrait @group Condition
ConditionAggregate		class	Drupal\Core\Entity\Query\Sql	core/lib/Drupal/Core/Entity/Query/Sql/ConditionAggregate.php	Defines the aggregate condition for sql based storage.		1
ConditionAggregateBase		abstract class	Drupal\Core\Entity\Query	core/lib/Drupal/Core/Entity/Query/ConditionAggregateBase.php	Defines a common base class for all aggregation entity condition implementations.	1	1
ConditionAggregateInterface		interface	Drupal\Core\Entity\Query	core/lib/Drupal/Core/Entity/Query/ConditionAggregateInterface.php	Defines aggregated entity query conditions.	1	1
ConditionBase		abstract class	Drupal\Core\Entity\Query	core/lib/Drupal/Core/Entity/Query/ConditionBase.php	Defines a common base class for all entity condition implementations.	3	3
ConditionFormTest		class	Drupal\Tests\system\Functional\Condition	core/modules/system/tests/src/Functional/Condition/ConditionFormTest.php	Tests that condition plugins basic form handling is working.
ConditionFundamentals		abstract class	Drupal\Core\Entity\Query	core/lib/Drupal/Core/Entity/Query/ConditionFundamentals.php	Common code for all implementations of the entity query condition interfaces.	2

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