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Classes, traits, and interfaces in Drupal 10

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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

Namesort descending Type Namespace Location Description Direct uses Use statements Strings
AjaxTestController class Drupal\ajax_test\Controller core/modules/system/tests/modules/ajax_test/src/Controller/AjaxTestController.php Provides content for dialog tests. 3
AjaxTestDialogForm class Drupal\ajax_test\Form core/modules/system/tests/modules/ajax_test/src/Form/AjaxTestDialogForm.php Dummy form for testing DialogRenderer with _form routes.
AjaxTestFocusFirstForm class Drupal\ajax_test\Form core/modules/system/tests/modules/ajax_test/src/Form/AjaxTestFocusFirstForm.php Form for testing AJAX FocusFirstCommand. 1
AjaxTestForm class Drupal\ajax_test\Form core/modules/system/tests/modules/ajax_test/src/Form/AjaxTestForm.php Dummy form for testing DialogRenderer with _form routes. 1
AjaxTestFormPromise class Drupal\ajax_test\Form core/modules/system/tests/modules/ajax_test/src/Form/AjaxTestFormPromise.php Test form for ajax_test_form_promise. 1
AjaxTestImageEffect class Drupal\image_module_test\Plugin\ImageEffect core/modules/image/tests/modules/image_module_test/src/Plugin/ImageEffect/AjaxTestImageEffect.php Provides a test effect using Ajax in the configuration form.
AjaxTestMessageCommandForm class Drupal\ajax_test\Form core/modules/system/tests/modules/ajax_test/src/Form/AjaxTestMessageCommandForm.php Form for testing AJAX MessageCommand. 1
AlertCommand class Drupal\Core\Ajax core/lib/Drupal/Core/Ajax/AlertCommand.php AJAX command for a javascript alert box. 6
AliasingResourceTypeRepository class Drupal\jsonapi_test_field_aliasing\ResourceType core/modules/jsonapi/tests/modules/jsonapi_test_field_aliasing/src/ResourceType/AliasingResourceTypeRepository.php Provides a repository of resource types with field names that can be aliased. 2
AliasManager class Drupal\path_alias core/modules/path_alias/src/AliasManager.php The default alias manager implementation. 3 2
AliasManagerInterface interface Drupal\path_alias core/modules/path_alias/src/AliasManagerInterface.php Find an alias for a path and vice versa. 2 11
AliasManagerTest class Drupal\Tests\path_alias\Unit core/modules/path_alias/tests/src/Unit/AliasManagerTest.php @coversDefaultClass \Drupal\path_alias\AliasManager @group path_alias
AliasPathProcessor class Drupal\path_alias\PathProcessor core/modules/path_alias/src/PathProcessor/AliasPathProcessor.php Processes the inbound path using path alias lookups. 3 2
AliasPathProcessorTest class Drupal\Tests\path_alias\Unit\PathProcessor core/modules/path_alias/tests/src/Unit/PathProcessor/AliasPathProcessorTest.php @coversDefaultClass \Drupal\path_alias\PathProcessor\AliasPathProcessor @group PathProcessor @group path_alias
AliasRepository class Drupal\path_alias core/modules/path_alias/src/AliasRepository.php Provides the default path alias lookup operations. 1 1 2
AliasRepositoryInterface interface Drupal\path_alias core/modules/path_alias/src/AliasRepositoryInterface.php Provides an interface for path alias lookup operations. 1 1
AliasTest class Drupal\Tests\path_alias\Kernel core/modules/path_alias/tests/src/Kernel/AliasTest.php Tests path alias CRUD and lookup functionality.
AliasWhitelist class Drupal\path_alias core/modules/path_alias/src/AliasWhitelist.php Extends CacheCollector to build the path alias whitelist over time. 1 2
AliasWhitelistInterface interface Drupal\path_alias core/modules/path_alias/src/AliasWhitelistInterface.php Cache the alias whitelist. 1
Alignment class Drupal\ckeditor5\Plugin\CKEditor5Plugin core/modules/ckeditor5/src/Plugin/CKEditor5Plugin/Alignment.php CKEditor 5 Alignment plugin. 1 1
AlignmentPluginTest class Drupal\Tests\ckeditor5\Unit core/modules/ckeditor5/tests/src/Unit/AlignmentPluginTest.php @coversDefaultClass \Drupal\ckeditor5\Plugin\CKEditor5Plugin\Alignment @group ckeditor5 @internal
AllowedPackages class Drupal\Composer\Plugin\Scaffold composer/Plugin/Scaffold/AllowedPackages.php Determine recursively which packages have been allowed to scaffold files.
AllowedValuesConstraint class Drupal\Core\Validation\Plugin\Validation\Constraint core/lib/Drupal/Core/Validation/Plugin/Validation/Constraint/AllowedValuesConstraint.php Checks for the value being allowed. 1
AllowedValuesConstraintValidator class Drupal\Core\Validation\Plugin\Validation\Constraint core/lib/Drupal/Core/Validation/Plugin/Validation/Constraint/AllowedValuesConstraintValidator.php Validates the AllowedValues constraint.
AllowedValuesConstraintValidatorTest class Drupal\KernelTests\Core\TypedData core/tests/Drupal/KernelTests/Core/TypedData/AllowedValuesConstraintValidatorTest.php Tests AllowedValues validation constraint with both valid and invalid values.
AllowToolbarPath class Drupal\toolbar\PageCache core/modules/toolbar/src/PageCache/AllowToolbarPath.php Cache policy for the toolbar page cache service. 1 2
AllowToolbarPathTest class Drupal\Tests\toolbar\Unit\PageCache core/modules/toolbar/tests/src/Unit/PageCache/AllowToolbarPathTest.php @coversDefaultClass \Drupal\toolbar\PageCache\AllowToolbarPath @group toolbar
AlreadyInstalledException class Drupal\Core\Installer\Exception core/lib/Drupal/Core/Installer/Exception/AlreadyInstalledException.php Exception thrown if Drupal is installed already. 1
AlterableInterface interface Drupal\Core\Database\Query core/lib/Drupal/Core/Database/Query/AlterableInterface.php Interface for a query that can be manipulated via an alter hook. 2 12
AlterTest class Drupal\KernelTests\Core\Database core/tests/Drupal/KernelTests/Core/Database/AlterTest.php Tests the hook_query_alter capabilities of the Select builder.
AlterTest class Drupal\Tests\system\Functional\Common core/modules/system/tests/src/Functional/Common/AlterTest.php Tests alteration of arguments passed to \Drupal::moduleHandler->alter().
AlterTest class Drupal\Tests\system\Functional\Form core/modules/system/tests/src/Functional/Form/AlterTest.php Tests hook_form_alter() and hook_form_FORM_ID_alter().
AmbiguousBundleClassException class Drupal\Core\Entity\Exception core/lib/Drupal/Core/Entity/Exception/AmbiguousBundleClassException.php Exception thrown if a bundle class is defined for multiple bundles. 3
AmbiguousEntityClassException class Drupal\Core\Entity\Exception core/lib/Drupal/Core/Entity/Exception/AmbiguousEntityClassException.php Exception thrown if multiple entity types exist for an entity class. 1 2
Analyze class Drupal\views_ui\Form\Ajax core/modules/views_ui/src/Form/Ajax/Analyze.php Displays analysis information for a view.
Analyzer class Drupal\views core/modules/views/src/Analyzer.php This tool is a small plugin manager to perform analysis on a view and report results to the user. This tool is meant to let modules that provide data to Views also help users properly use that data by detecting invalid configurations. Views itself… 3 2
AnalyzeTest class Drupal\Tests\views_ui\Functional core/modules/views_ui/tests/src/Functional/AnalyzeTest.php Tests the views analyze system.
AnnotatedClassDiscovery class Drupal\Core\Plugin\Discovery core/lib/Drupal/Core/Plugin/Discovery/AnnotatedClassDiscovery.php Defines a discovery mechanism to find annotated plugins in PSR-4 namespaces. 1 9
AnnotatedClassDiscovery class Drupal\Component\Annotation\Plugin\Discovery core/lib/Drupal/Component/Annotation/Plugin/Discovery/AnnotatedClassDiscovery.php Defines a discovery mechanism to find annotated plugins in PSR-4 namespaces. 1 4
AnnotatedClassDiscoveryAutomatedProviders class Drupal\migrate\Plugin\Discovery core/modules/migrate/src/Plugin/Discovery/AnnotatedClassDiscoveryAutomatedProviders.php Determines providers based on a class's and its parent's namespaces. 1
AnnotatedClassDiscoveryCachedTest class Drupal\Tests\Component\Annotation core/tests/Drupal/Tests/Component/Annotation/AnnotatedClassDiscoveryCachedTest.php @coversDefaultClass \Drupal\Component\Annotation\Plugin\Discovery\AnnotatedClassDiscovery @group Annotation @runTestsInSeparateProcesses
AnnotatedClassDiscoveryTest class Drupal\Tests\Component\Annotation core/tests/Drupal/Tests/Component/Annotation/AnnotatedClassDiscoveryTest.php @coversDefaultClass \Drupal\Component\Annotation\Plugin\Discovery\AnnotatedClassDiscovery @group Annotation @runTestsInSeparateProcesses
AnnotatedClassDiscoveryTest class Drupal\Tests\Component\Plugin\Discovery core/tests/Drupal/Tests/Component/Plugin/Discovery/AnnotatedClassDiscoveryTest.php @coversDefaultClass \Drupal\Component\Annotation\Plugin\Discovery\AnnotatedClassDiscovery
AnnotatedClassDiscoveryTest class Drupal\KernelTests\Core\Plugin\Discovery core/tests/Drupal/KernelTests/Core/Plugin/Discovery/AnnotatedClassDiscoveryTest.php Tests that plugins are correctly discovered using annotated classes.
AnnotationBase abstract class Drupal\Component\Annotation core/lib/Drupal/Component/Annotation/AnnotationBase.php Provides a base class for classed annotations. 5 4
AnnotationBaseStub class Drupal\Tests\Component\Annotation core/tests/Drupal/Tests/Component/Annotation/AnnotationBaseTest.php
AnnotationBaseTest class Drupal\Tests\Component\Annotation core/tests/Drupal/Tests/Component/Annotation/AnnotationBaseTest.php @coversDefaultClass \Drupal\Component\Annotation\AnnotationBase @group Annotation
AnnotationBridgeDecorator class Drupal\Component\Annotation\Plugin\Discovery core/lib/Drupal/Component/Annotation/Plugin/Discovery/AnnotationBridgeDecorator.php Ensures that all definitions are run through the annotation process. 3
AnnotationBridgeDecoratorTest class Drupal\Tests\Component\Annotation\Plugin\Discovery core/tests/Drupal/Tests/Component/Annotation/Plugin/Discovery/AnnotationBridgeDecoratorTest.php @coversDefaultClass \Drupal\Component\Annotation\Plugin\Discovery\AnnotationBridgeDecorator @group Plugin
AnnotationEnum final class Drupal\Tests\Component\Annotation\Doctrine\Fixtures core/tests/Drupal/Tests/Component/Annotation/Doctrine/Fixtures/AnnotationEnum.php Plugin annotation @Target("ALL");

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