Classes, traits, and interfaces - main - 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 1529

Name	Deprecated	Object type	Namespace	File name	Summary	Direct uses	Use statements	Strings
DirectWriteSubscriber		final class	Drupal\package_manager\EventSubscriber	core/modules/package_manager/src/EventSubscriber/DirectWriteSubscriber.php	Handles sandbox events when direct-write is enabled.		1
DirectWriteTest		class	Drupal\Tests\package_manager\Kernel	core/modules/package_manager/tests/src/Kernel/DirectWriteTest.php	Tests Direct Write.
DisabledDisplayTest		class	Drupal\Tests\views\Functional\Plugin	core/modules/views/tests/src/Functional/Plugin/DisabledDisplayTest.php	Tests the ability to disable and enable view displays.
DisallowBasicAuthRequests		class	Drupal\basic_auth\PageCache	core/modules/basic_auth/src/PageCache/DisallowBasicAuthRequests.php	Cache policy for pages served from basic auth.			2
DiscardLayoutChangesForm		class	Drupal\layout_builder\Form	core/modules/layout_builder/src/Form/DiscardLayoutChangesForm.php	Discards any pending changes to the layout.
DiscoverableInterface		interface	Drupal\Component\Discovery	core/lib/Drupal/Component/Discovery/DiscoverableInterface.php	Interface for classes providing a type of discovery.	2
DiscoverServiceProvidersTest		class	Drupal\Tests\Core\DrupalKernel	core/tests/Drupal/Tests/Core/DrupalKernel/DiscoverServiceProvidersTest.php	Tests Drupal\Core\DrupalKernel.
DiscoveryCachedTrait		trait	Drupal\Component\Plugin\Discovery	core/lib/Drupal/Component/Plugin/Discovery/DiscoveryCachedTrait.php	Trait for accessing cached definitions of the plugin discovery component.		2
DiscoveryCachedTraitMockableClass		class	Drupal\Tests\Component\Plugin\Discovery	core/tests/Drupal/Tests/Component/Plugin/Discovery/DiscoveryCachedTraitTest.php	A class using the DiscoveryCachedTrait for mocking purposes.
DiscoveryCachedTraitTest		class	Drupal\Tests\Component\Plugin\Discovery	core/tests/Drupal/Tests/Component/Plugin/Discovery/DiscoveryCachedTraitTest.php	Tests Drupal\Component\Plugin\Discovery\DiscoveryCachedTrait.
DiscoveryException		class	Drupal\Component\Discovery	core/lib/Drupal/Component/Discovery/DiscoveryException.php	Exception thrown during discovery if the data is invalid.		3
DiscoveryInterface		interface	Drupal\Component\Plugin\Discovery	core/lib/Drupal/Component/Plugin/Discovery/DiscoveryInterface.php	Defines the minimum requirements for a plugin discovery component.	18	31
DiscoveryTest1		class	com\example\PluginNamespace	core/tests/Drupal/Tests/Component/Annotation/Fixtures/PluginNamespace/DiscoveryTest1.php	Provides a custom test plugin.
DiscoveryTestBase		abstract class	Drupal\KernelTests\Core\Plugin\Discovery	core/tests/Drupal/KernelTests/Core/Plugin/Discovery/DiscoveryTestBase.php	Base class for plugin discovery tests.	4
DiscoveryTrait		trait	Drupal\Component\Plugin\Discovery	core/lib/Drupal/Component/Plugin/Discovery/DiscoveryTrait.php			12
DiscoveryTraitMockableClass		class	Drupal\Tests\Component\Plugin\Discovery	core/tests/Drupal/Tests/Component/Plugin/Discovery/DiscoveryTraitTest.php	A class using the DiscoveryTrait for mocking purposes.
DiscoveryTraitTest		class	Drupal\Tests\Component\Plugin\Discovery	core/tests/Drupal/Tests/Component/Plugin/Discovery/DiscoveryTraitTest.php	Tests Drupal\Component\Plugin\Discovery\DiscoveryTrait.
DiskSpaceValidator		class	Drupal\package_manager\Validator	core/modules/package_manager/src/Validator/DiskSpaceValidator.php	Validates that there is enough free disk space to do stage operations.	1	2
DiskSpaceValidatorTest		class	Drupal\Tests\package_manager\Kernel	core/modules/package_manager/tests/src/Kernel/DiskSpaceValidatorTest.php	Tests Disk Space Validator.
Display		class	Drupal\views_ui\Form\Ajax	core/modules/views_ui/src/Form/Ajax/Display.php	Provides a form for editing the Views display.
DisplayApiTest		class	Drupal\Tests\field\Kernel	core/modules/field/tests/src/Kernel/DisplayApiTest.php	Tests the field display API.
DisplayAttachmentTest		class	Drupal\Tests\views_ui\Functional	core/modules/views_ui/tests/src/Functional/DisplayAttachmentTest.php	Tests the UI for the attachment display plugin.
DisplayAttachmentTest		class	Drupal\Tests\views\Functional\Plugin	core/modules/views/tests/src/Functional/Plugin/DisplayAttachmentTest.php	Tests the attachment display plugin.
DisplayBlockTest		class	Drupal\Tests\block\Functional\Views	core/modules/block/tests/src/Functional/Views/DisplayBlockTest.php	Tests the block display plugin.
DisplayCRUDTest		class	Drupal\Tests\views_ui\Functional	core/modules/views_ui/tests/src/Functional/DisplayCRUDTest.php	Tests creation, retrieval, updating, and deletion of displays in the Web UI.
DisplayEntityReferenceTest		class	Drupal\Tests\views\Functional\Plugin	core/modules/views/tests/src/Functional/Plugin/DisplayEntityReferenceTest.php	Tests the entity reference display plugin.
DisplayExtenderPluginBase		abstract class	Drupal\views\Plugin\views\display_extender	core/modules/views/src/Plugin/views/display_extender/DisplayExtenderPluginBase.php	Base class for Views display extender plugins.	2	1
DisplayExtenderTest		class	Drupal\Tests\views\Kernel\Plugin	core/modules/views/tests/src/Kernel/Plugin/DisplayExtenderTest.php	Tests the display extender plugins.
DisplayExtenderTest		class	Drupal\views_test_data\Plugin\views\display_extender	core/modules/views/tests/modules/views_test_data/src/Plugin/views/display_extender/DisplayExtenderTest.php	Defines a display extender test plugin.	2	1
DisplayExtenderTest2		class	Drupal\views_test_data\Plugin\views\display_extender	core/modules/views/tests/modules/views_test_data/src/Plugin/views/display_extender/DisplayExtenderTest2.php	Defines another display extender test plugin.
DisplayExtenderTest3		class	Drupal\views_test_data\Plugin\views\display_extender	core/modules/views/tests/modules/views_test_data/src/Plugin/views/display_extender/DisplayExtenderTest3.php	Defines the third display extender test plugin.
DisplayExtenderUITest		class	Drupal\Tests\views_ui\Functional	core/modules/views_ui/tests/src/Functional/DisplayExtenderUITest.php	Tests the display extender UI.
DisplayFeedTest		class	Drupal\Tests\views_ui\Functional	core/modules/views_ui/tests/src/Functional/DisplayFeedTest.php	Tests the UI for feed display plugin.
DisplayFeedTest		class	Drupal\Tests\views\Functional\Plugin	core/modules/views/tests/src/Functional/Plugin/DisplayFeedTest.php	Tests the feed display plugin.
DisplayFeedTranslationTest		class	Drupal\Tests\views\Functional\Plugin	core/modules/views/tests/src/Functional/Plugin/DisplayFeedTranslationTest.php	Tests the feed display plugin with translated content.
DisplayKernelTest		class	Drupal\Tests\views\Kernel\Plugin	core/modules/views/tests/src/Kernel/Plugin/DisplayKernelTest.php	Drupal unit tests for the DisplayPluginBase class.
DisplayLink		class	Drupal\views\Plugin\views\area	core/modules/views/src/Plugin/views/area/DisplayLink.php	Views area display_link handler.
DisplayMenuInterface		interface	Drupal\views\Plugin\views\display	core/modules/views/src/Plugin/views/display/DisplayMenuInterface.php	Defines an interface for displays that provide menu links.	1	1
DisplayModeBundleSelectionTest		class	Drupal\Tests\field_ui\FunctionalJavascript	core/modules/field_ui/tests/src/FunctionalJavascript/DisplayModeBundleSelectionTest.php	Tests the bundle selection for view & form display modes.
DisplayModeLocalAction		class	Drupal\field_ui	core/modules/field_ui/src/DisplayModeLocalAction.php	Defines a local action plugin with modal dialog.			1
DisplayModeUpdateTest		class	Drupal\Tests\field\Kernel	core/modules/field/tests/src/Kernel/DisplayModeUpdateTest.php	Ensure display modes are updated when fields are created.
DisplayNoAreaTest		class	Drupal\views_test_data\Plugin\views\display	core/modules/views/tests/modules/views_test_data/src/Plugin/views/display/DisplayNoAreaTest.php	Defines a Display test plugin with areas disabled.
DisplayPageTest		class	Drupal\Tests\views\Kernel\Plugin	core/modules/views/tests/src/Kernel/Plugin/DisplayPageTest.php	Tests the page display plugin.
DisplayPageWebTest		class	Drupal\Tests\views\Functional\Plugin	core/modules/views/tests/src/Functional/Plugin/DisplayPageWebTest.php	Tests the views page display plugin.
DisplayPathTest		class	Drupal\Tests\views_ui\Functional	core/modules/views_ui/tests/src/Functional/DisplayPathTest.php	Tests the UI of generic display path plugin.
DisplayPluginBase		abstract class	Drupal\views\Plugin\views\display	core/modules/views/src/Plugin/views/display/DisplayPluginBase.php	Base class for views display plugins.	7	79
DisplayPluginCollection		class	Drupal\views	core/modules/views/src/DisplayPluginCollection.php	A class which wraps the displays of a view so you can lazy-initialize them.		4
DisplayPluginInterface		interface	Drupal\views\Plugin\views\display	core/modules/views/src/Plugin/views/display/DisplayPluginInterface.php	Provides an interface for Views display plugins.	3	2
DisplayRouterInterface		interface	Drupal\views\Plugin\views\display	core/modules/views/src/Plugin/views/display/DisplayRouterInterface.php	Defines an interface for displays that can collect routes.	1	3
DisplayTest		class	Drupal\Tests\views\Functional\Plugin	core/modules/views/tests/src/Functional/Plugin/DisplayTest.php	Tests the basic display plugin.

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