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
PluginDependencyTrait		trait	Drupal\Core\Plugin	core/lib/Drupal/Core/Plugin/PluginDependencyTrait.php	Provides a trait for calculating the dependencies of a plugin.		5
PluginDependencyTraitTest		class	Drupal\Tests\Core\Plugin	core/tests/Drupal/Tests/Core/Plugin/PluginDependencyTraitTest.php	Tests Drupal\Core\Plugin\PluginDependencyTrait.
PluginEventSubscriber		class	Drupal\migrate\Plugin	core/modules/migrate/src/Plugin/PluginEventSubscriber.php	Event subscriber to forward Migrate events to source and destination plugins.			2
PluginExample		class	Drupal\plugin_test\Plugin\Attribute	core/modules/system/tests/modules/plugin_test/src/Plugin/Attribute/PluginExample.php	Defines a custom PluginExample attribute.		6
PluginExample		class	Drupal\plugin_test\Plugin\Annotation	core/modules/system/tests/modules/plugin_test/src/Plugin/Annotation/PluginExample.php	Defines a custom Plugin annotation.		1
PluginException		class	Drupal\Component\Plugin\Exception	core/lib/Drupal/Component/Plugin/Exception/PluginException.php	Base class for plugin exceptions.	3	24
PluginExistsConstraint		class	Drupal\Core\Plugin\Plugin\Validation\Constraint	core/lib/Drupal/Core/Plugin/Plugin/Validation/Constraint/PluginExistsConstraint.php	Checks if a plugin exists and optionally implements a particular interface.		2
PluginExistsConstraintTest		class	Drupal\Tests\Core\Plugin	core/tests/Drupal/Tests/Core/Plugin/PluginExistsConstraintTest.php	Tests Drupal\Core\Plugin\Plugin\Validation\Constraint\PluginExistsConstraint.
PluginExistsConstraintValidator		class	Drupal\Core\Plugin\Plugin\Validation\Constraint	core/lib/Drupal/Core/Plugin/Plugin/Validation/Constraint/PluginExistsConstraintValidator.php	Validates the PluginExists constraint.		1
PluginExistsConstraintValidatorTest		class	Drupal\KernelTests\Core\Plugin	core/tests/Drupal/KernelTests/Core/Plugin/PluginExistsConstraintValidatorTest.php	Tests Plugin Exists Constraint Validator.
PluginExtended		class	Drupal\plugin_test_extended\Plugin\Annotation	core/modules/system/tests/modules/plugin_test_extended/src/Plugin/Annotation/PluginExtended.php	Defines a test annotation that extends an annotation in another namespace.
PluginFormBase		abstract class	Drupal\Core\Plugin	core/lib/Drupal/Core/Plugin/PluginFormBase.php	Provides a base class for plugin forms.	7	7
PluginFormFactory		class	Drupal\Core\Plugin	core/lib/Drupal/Core/Plugin/PluginFormFactory.php	Provides form discovery capabilities for plugins.		1	2
PluginFormFactoryInterface		interface	Drupal\Core\Plugin	core/lib/Drupal/Core/Plugin/PluginFormFactoryInterface.php	Provides an interface for retrieving form objects for plugins.	1	10
PluginFormFactoryTest		class	Drupal\Tests\Core\Plugin	core/tests/Drupal/Tests/Core/Plugin/PluginFormFactoryTest.php	Tests Drupal\Core\Plugin\PluginFormFactory.
PluginFormInterface		interface	Drupal\Core\Plugin	core/lib/Drupal/Core/Plugin/PluginFormInterface.php	Provides an interface for an embeddable plugin form.	23	28
PluginID		class	Drupal\Component\Annotation	core/lib/Drupal/Component/Annotation/PluginID.php	Defines a Plugin annotation object that just contains an ID.	2	3
PluginID		class	Drupal\Component\Plugin\Attribute	core/lib/Drupal/Component/Plugin/Attribute/PluginID.php	Defines a Plugin attribute object that just contains an ID.	6	12
PluginIdTest		class	Drupal\Tests\Component\Annotation	core/tests/Drupal/Tests/Component/Annotation/PluginIdTest.php	Tests Drupal\Component\Annotation\PluginID.
PluginIdTest		class	Drupal\Tests\Component\Plugin\Attribute	core/tests/Drupal/Tests/Component/Plugin/Attribute/PluginIdTest.php	Tests Drupal\Component\Plugin\Attribute\PluginID.
PluginInspectionInterface		interface	Drupal\Component\Plugin	core/lib/Drupal/Component/Plugin/PluginInspectionInterface.php	Plugin interface for providing some metadata inspection.	32	43
PluginInstanceTest		class	Drupal\Tests\views\Kernel	core/modules/views/tests/src/Kernel/PluginInstanceTest.php	Tests that an instance of all views plugins can be created.
PluginKernelTestBase		abstract class	Drupal\Tests\views\Kernel\Plugin	core/modules/views/tests/src/Kernel/Plugin/PluginKernelTestBase.php	Base test class for views plugin unit tests.	4
PluginManager		class	Drupal\lazy_route_provider_install_test	core/modules/system/tests/modules/lazy_route_provider_install_test/src/PluginManager.php	Plugin manager for testing the lazy route provider during module install.			2
PluginManagerBase		abstract class	Drupal\Component\Plugin	core/lib/Drupal/Component/Plugin/PluginManagerBase.php	Base class for plugin managers.	7	9
PluginManagerBaseTest		class	Drupal\Tests\Component\Plugin	core/tests/Drupal/Tests/Component/Plugin/PluginManagerBaseTest.php	Tests Drupal\Component\Plugin\PluginManagerBase.
PluginManagerCacheClearer		class	Drupal\module_test	core/modules/system/tests/modules/module_test/src/PluginManagerCacheClearer.php	Helps test module uninstall.		1	2
PluginManagerDependentValidatorTrait		trait	Drupal\ckeditor5\Plugin\Validation\Constraint	core/modules/ckeditor5/src/Plugin/Validation/Constraint/PluginManagerDependentValidatorTrait.php	Common functionality for many CKEditor 5 validation constraints.
PluginManagerInterface		interface	Drupal\Component\Plugin	core/lib/Drupal/Component/Plugin/PluginManagerInterface.php	Interface implemented by plugin managers.	21	49
PluginManagerPass		class	Drupal\Core\Plugin	core/lib/Drupal/Core/Plugin/PluginManagerPass.php	Registers plugin managers to the plugin.cache_clearer service.		1
PluginNotFoundException		class	Drupal\Component\Plugin\Exception	core/lib/Drupal/Component/Plugin/Exception/PluginNotFoundException.php	Plugin exception class to be thrown when a plugin ID could not be found.		59
PluginSettingsBase		abstract class	Drupal\Core\Field	core/lib/Drupal/Core/Field/PluginSettingsBase.php	Base class for the Field API plugins.	3	1
PluginSettingsBaseTest		class	Drupal\Tests\Core\Field	core/tests/Drupal/Tests/Core/Field/PluginSettingsBaseTest.php	Tests Drupal\Core\Field\PluginSettingsBase.
PluginSettingsInterface		interface	Drupal\Core\Field	core/lib/Drupal/Core/Field/PluginSettingsInterface.php	Interface definition for plugin with settings.	3	3
PluginStub		class	Drupal\Tests\Component\Annotation	core/tests/Drupal/Tests/Component/Annotation/PluginTest.php
PluginStub		class	Drupal\Tests\Component\Plugin\Attribute	core/tests/Drupal/Tests/Component/Plugin/Attribute/PluginTest.php
PluginTest		class	Drupal\Tests\Component\Annotation	core/tests/Drupal/Tests/Component/Annotation/PluginTest.php	Tests Drupal\Component\Annotation\Plugin.
PluginTest		class	Drupal\Tests\Component\Plugin\Attribute	core/tests/Drupal/Tests/Component/Plugin/Attribute/PluginTest.php	Tests Drupal\Component\Plugin\Attribute\Plugin.
PluginTestBase		abstract class	Drupal\KernelTests\Core\Plugin	core/tests/Drupal/KernelTests/Core/Plugin/PluginTestBase.php	Base class for Plugin API unit tests.	3
PluginTestHooks		class	Drupal\plugin_test\Hook	core/modules/system/tests/modules/plugin_test/src/Hook/PluginTestHooks.php	Hook implementations for plugin_test.
PluginTypeListTest		class	Drupal\Tests\views\Unit	core/modules/views/tests/src/Unit/PluginTypeListTest.php	Tests that list of plugin is correct.
PluginWithFormsInterface		interface	Drupal\Core\Plugin	core/lib/Drupal/Core/Plugin/PluginWithFormsInterface.php	Provides an interface for plugins which have forms.	6	14
PluginWithFormsTrait		trait	Drupal\Core\Plugin	core/lib/Drupal/Core/Plugin/PluginWithFormsTrait.php	Provides a trait with typical behavior for plugins which have forms.		5
PluginWithFormsTraitTest		class	Drupal\Tests\Core\Plugin	core/tests/Drupal/Tests/Core/Plugin/PluginWithFormsTraitTest.php	Tests Drupal\Core\Plugin\PluginWithFormsTrait.
PluralFormula		class	Drupal\locale	core/modules/locale/src/PluralFormula.php	Manages the storage of plural formula per language in state.			2
PluralFormulaInterface		interface	Drupal\locale	core/modules/locale/src/PluralFormulaInterface.php	An interface for a service providing plural formulae.	1
PluralTranslatableMarkup		class	Drupal\Core\StringTranslation	core/lib/Drupal/Core/StringTranslation/PluralTranslatableMarkup.php	A class to hold plural translatable markup.		17
PluralTranslatableMarkupTest		class	Drupal\Tests\Core\StringTranslation	core/tests/Drupal/Tests/Core/StringTranslation/PluralTranslatableMarkupTest.php	Tests the TranslatableMarkup class.
PluralTranslation		class	Drupal\Core\Annotation	core/lib/Drupal/Core/Annotation/PluralTranslation.php	Defines an annotation object for strings that require plural forms.		1
PluralTranslationTest		class	Drupal\Tests\Core\Annotation	core/tests/Drupal/Tests/Core/Annotation/PluralTranslationTest.php	Tests Drupal\Core\Annotation\PluralTranslation.

Other projects

Buggy or inaccurate documentation? Please file an issue. Need support? Need help programming? Connect with the Drupal community.