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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
AreaTitleTest class Drupal\Tests\views\Kernel\Handler core/modules/views/tests/src/Kernel/Handler/AreaTitleTest.php Tests the title area handler.
AreaTitleWebTest class Drupal\Tests\views\Functional\Handler core/modules/views/tests/src/Functional/Handler/AreaTitleWebTest.php Tests the title area handler with a web test.
AreaViewTest class Drupal\Tests\views\Kernel\Handler core/modules/views/tests/src/Kernel/Handler/AreaViewTest.php Tests the view area handler.
ArgumentDateTest class Drupal\Tests\views\Kernel\Handler core/modules/views/tests/src/Kernel/Handler/ArgumentDateTest.php Tests the core date argument handlers.
ArgumentDateTimeTest class Drupal\Tests\datetime\Kernel\Views core/modules/datetime/tests/src/Kernel/Views/ArgumentDateTimeTest.php Tests the Drupal\datetime\Plugin\views\filter\Date handler.
ArgumentDefaultTest class Drupal\Tests\user\Kernel\Views core/modules/user/tests/src/Kernel/Views/ArgumentDefaultTest.php Tests views user argument default plugin.
ArgumentDefaultTest class Drupal\Tests\views\Functional\Plugin core/modules/views/tests/src/Functional/Plugin/ArgumentDefaultTest.php Tests pluggable argument_default for views.
ArgumentDefaultTest class Drupal\views_test_data\Plugin\views\argument_default core/modules/views/tests/modules/views_test_data/src/Plugin/views/argument_default/ArgumentDefaultTest.php Defines an argument default test plugin. 1
ArgumentLanguageTest class Drupal\Tests\language\Kernel\Views core/modules/language/tests/src/Kernel/Views/ArgumentLanguageTest.php Tests the argument language handler.
ArgumentNodeRevisionIdTest class Drupal\Tests\node\Kernel\Views core/modules/node/tests/src/Kernel/Views/ArgumentNodeRevisionIdTest.php Tests the node_vid handler.
ArgumentNullTest class Drupal\Tests\views\Kernel\Handler core/modules/views/tests/src/Kernel/Handler/ArgumentNullTest.php Tests the core Drupal\views\Plugin\views\argument\NullArgument handler.
ArgumentsAllNull class Drupal\Tests\Component\Plugin\Factory core/tests/Drupal/Tests/Component/Plugin/Factory/ReflectionFactoryTest.php A stub class used by testGetInstanceArguments().
ArgumentsConfigArrayKey class Drupal\Tests\Component\Plugin\Factory core/tests/Drupal/Tests/Component/Plugin/Factory/ReflectionFactoryTest.php A stub class used by testGetInstanceArguments().
ArgumentsMany class Drupal\Tests\Component\Plugin\Factory core/tests/Drupal/Tests/Component/Plugin/Factory/ReflectionFactoryTest.php A stub class used by testGetInstanceArguments().
ArgumentsNoConstructor class Drupal\Tests\Component\Plugin\Factory core/tests/Drupal/Tests/Component/Plugin/Factory/ReflectionFactoryTest.php A stub class used by testGetInstanceArguments().
ArgumentsPluginId class Drupal\Tests\Component\Plugin\Factory core/tests/Drupal/Tests/Component/Plugin/Factory/ReflectionFactoryTest.php A stub class used by testGetInstanceArguments().
ArgumentsResolver class Drupal\Component\Utility core/lib/Drupal/Component/Utility/ArgumentsResolver.php Resolves the arguments to pass to a callable. 3
ArgumentsResolverInterface interface Drupal\Component\Utility core/lib/Drupal/Component/Utility/ArgumentsResolverInterface.php Resolves the arguments to pass to a callable. 1 1
ArgumentsResolverTest class Drupal\Tests\Component\Utility core/tests/Drupal/Tests/Component/Utility/ArgumentsResolverTest.php @coversDefaultClass \Drupal\Component\Utility\ArgumentsResolver @group Access
ArgumentStringTest class Drupal\Tests\views\Kernel\Handler core/modules/views/tests/src/Kernel/Handler/ArgumentStringTest.php Tests the core Drupal\views\Plugin\views\argument\StringArgument handler.
ArgumentTransformTermTest class Drupal\Tests\taxonomy\Kernel\Views core/modules/taxonomy/tests/src/Kernel/Views/ArgumentTransformTermTest.php Tests taxonomy term argument transformation.
ArgumentUidRevisionTest class Drupal\Tests\node\Kernel\Views core/modules/node/tests/src/Kernel/Views/ArgumentUidRevisionTest.php Tests the argument_node_uid_revision handler.
ArgumentValidateTest class Drupal\Tests\user\Kernel\Views core/modules/user/tests/src/Kernel/Views/ArgumentValidateTest.php Tests user argument validators for ID and name.
ArgumentValidatorTermNameTest class Drupal\Tests\taxonomy\Kernel\Views core/modules/taxonomy/tests/src/Kernel/Views/ArgumentValidatorTermNameTest.php Tests the plugin of the taxonomy: taxonomy_term_name argument validator.
ArgumentValidatorTermTest class Drupal\Tests\taxonomy\Kernel\Views core/modules/taxonomy/tests/src/Kernel/Views/ArgumentValidatorTermTest.php Tests the plugin of the taxonomy: term argument validator.
ArgumentValidatorTest class Drupal\Tests\views_ui\Functional core/modules/views_ui/tests/src/Functional/ArgumentValidatorTest.php Tests the Argument validator through the UI.
ArgumentValidatorTest class Drupal\Tests\views\Kernel\Plugin core/modules/views/tests/src/Kernel/Plugin/ArgumentValidatorTest.php Tests Views argument validators.
ArrayBuild class Drupal\migrate\Plugin\migrate\process core/modules/migrate/src/Plugin/migrate/process/ArrayBuild.php Builds an array based on the key and value configuration. 1 2
ArrayBuildTest class Drupal\Tests\migrate\Unit\process core/modules/migrate/tests/src/Unit/process/ArrayBuildTest.php @coversDefaultClass \Drupal\migrate\Plugin\migrate\process\ArrayBuild @group migrate
ArrayElement abstract class Drupal\Core\Config\Schema core/lib/Drupal/Core/Config/Schema/ArrayElement.php Defines a generic configuration element that contains multiple properties. 1 1
AssertBlockAppearsTrait trait Drupal\Tests\block\Functional core/modules/block/tests/src/Functional/AssertBlockAppearsTrait.php Provides test assertions for testing block appearance. 2
AssertConfigEntityImportTrait trait Drupal\Tests\config\Traits core/modules/config/tests/src/Traits/AssertConfigEntityImportTrait.php Provides test assertions for testing config entity synchronization. 1
AssertConfigTrait trait Drupal\KernelTests core/tests/Drupal/KernelTests/AssertConfigTrait.php Trait to help with diffing config. 4
AssertContentTrait trait Drupal\KernelTests core/tests/Drupal/KernelTests/AssertContentTrait.php Provides test methods to assert content. 1
AssertContentTraitTest class Drupal\Tests\Core\Test core/tests/Drupal/Tests/Core/Test/AssertContentTraitTest.php @coversDefaultClass \Drupal\KernelTests\AssertContentTrait @group Test
AssertMailTrait trait Drupal\Core\Test core/lib/Drupal/Core/Test/AssertMailTrait.php Provides methods for testing emails sent during test runs. 13
AssertMailTraitTest class Drupal\KernelTests\Core\Test core/tests/Drupal/KernelTests/Core/Test/AssertMailTraitTest.php Tests \Drupal\Core\Test\AssertMailTrait works.
AssertMenuActiveTrailTrait trait Drupal\Tests\system\Functional\Menu core/modules/system/tests/src/Functional/Menu/AssertMenuActiveTrailTrait.php Provides test assertions for verifying the active menu trail.
AssertPageCacheContextsAndTagsTrait trait Drupal\Tests\system\Functional\Cache core/modules/system/tests/src/Functional/Cache/AssertPageCacheContextsAndTagsTrait.php Provides test assertions for testing page-level cache contexts & tags. 42
AssertUtilsTrait trait Drupal\Tests\Composer\Plugin\Scaffold core/tests/Drupal/Tests/Composer/Plugin/Scaffold/AssertUtilsTrait.php Convenience class for creating fixtures. 3
AssertViewsCacheTagsTrait trait Drupal\views\Tests core/modules/views/src/Tests/AssertViewsCacheTagsTrait.php 3
AssetCollectionGrouperInterface interface Drupal\Core\Asset core/lib/Drupal/Core/Asset/AssetCollectionGrouperInterface.php Interface defining a service that logically groups a collection of assets. 2 1
AssetCollectionGroupOptimizerInterface interface Drupal\Core\Asset core/lib/Drupal/Core/Asset/AssetCollectionGroupOptimizerInterface.php Interface defining a service that optimizes a collection of assets.
AssetCollectionOptimizerInterface interface Drupal\Core\Asset core/lib/Drupal/Core/Asset/AssetCollectionOptimizerInterface.php Interface defining a service that optimizes a collection of assets. 3 1
AssetCollectionRendererInterface interface Drupal\Core\Asset core/lib/Drupal/Core/Asset/AssetCollectionRendererInterface.php Interface defining a service that generates a render array to render assets. 2
AssetDumper class Drupal\Core\Asset core/lib/Drupal/Core/Asset/AssetDumper.php Dumps a CSS or JavaScript asset. 3
AssetDumperInterface interface Drupal\Core\Asset core/lib/Drupal/Core/Asset/AssetDumperInterface.php Interface defining a service that dumps an (optimized) asset. 1 1
AssetDumperUriInterface interface Drupal\Core\Asset core/lib/Drupal/Core/Asset/AssetDumperUriInterface.php Interface defining a service that dumps an asset to a specified location. 1
AssetGroupSetHashTrait trait Drupal\Core\Asset core/lib/Drupal/Core/Asset/AssetGroupSetHashTrait.php Provides a method to generate a normalized hash of a given asset group set.
AssetOptimizationTest class Drupal\FunctionalTests\Asset core/tests/Drupal/FunctionalTests/Asset/AssetOptimizationTest.php Tests asset aggregation. 1

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