Classes, traits, and interfaces - Drupal 11.1.x - Drupal Core

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
FilterArray		class	Drupal\Component\Utility	core/lib/Drupal/Component/Utility/FilterArray.php	Provides methods to filter arrays.		9
FilterAutoP		class	Drupal\filter\Plugin\Filter	core/modules/filter/src/Plugin/Filter/FilterAutoP.php	Provides a filter to convert line breaks to HTML.		1
FilterBase		abstract class	Drupal\filter\Plugin	core/modules/filter/src/Plugin/FilterBase.php	Provides a base class for Filter plugins.	12	12
FilterCaption		class	Drupal\filter\Plugin\Filter	core/modules/filter/src/Plugin/Filter/FilterCaption.php	Provides a filter to caption elements.
FilterController		class	Drupal\filter\Controller	core/modules/filter/src/Controller/FilterController.php	Controller routines for filter routes.
FilterDirectory		final class	PHPUnit\TextUI\Configuration	vendor/phpunit/phpunit/src/TextUI/Configuration/Value/FilterDirectory.php	@no-named-arguments Parameter names are not covered by the backward compatibility promise for PHPUnit		1
FilterDirectoryCollection		final class	PHPUnit\TextUI\Configuration	vendor/phpunit/phpunit/src/TextUI/Configuration/Value/FilterDirectoryCollection.php	@no-named-arguments Parameter names are not covered by the backward compatibility promise for PHPUnit		3
FilterDirectoryCollectionIterator		final class	PHPUnit\TextUI\Configuration	vendor/phpunit/phpunit/src/TextUI/Configuration/Value/FilterDirectoryCollectionIterator.php	@no-named-arguments Parameter names are not covered by the backward compatibility promise for PHPUnit
FilterDisableForm		class	Drupal\filter\Form	core/modules/filter/src/Form/FilterDisableForm.php	Provides the filter format disable form.		1
Filtered		final class	PHPUnit\Event\TestSuite	vendor/phpunit/phpunit/src/Event/Events/TestSuite/Filtered.php	@psalm-immutable		1
FilteredAttributeProcessor		final class	OpenTelemetry\SDK\Metrics\AttributeProcessor	vendor/open-telemetry/sdk/Metrics/AttributeProcessor/FilteredAttributeProcessor.php	@internal		1
FilteredAttributesBuilder		final class	OpenTelemetry\SDK\Common\Attribute	vendor/open-telemetry/sdk/Common/Attribute/FilteredAttributesBuilder.php	@internal
FilteredAttributesFactory		final class	OpenTelemetry\SDK\Common\Attribute	vendor/open-telemetry/sdk/Common/Attribute/FilteredAttributesFactory.php	@internal		1
FilteredMarkup		final class	Drupal\filter\Render	core/modules/filter/src/Render/FilteredMarkup.php	Defines an object that passes markup through the Filter system.		3
FilteredPluginManagerInterface		interface	Drupal\Core\Plugin	core/lib/Drupal/Core/Plugin/FilteredPluginManagerInterface.php	Provides an interface for plugin managers that allow filtering definitions.	3	3
FilteredPluginManagerTrait		trait	Drupal\Core\Plugin	core/lib/Drupal/Core/Plugin/FilteredPluginManagerTrait.php	Provides a trait for plugin managers that allow filtering plugin definitions.		3
FilteredReservoir		final class	OpenTelemetry\SDK\Metrics\Exemplar	vendor/open-telemetry/sdk/Metrics/Exemplar/FilteredReservoir.php	The exemplar spec is not yet stable, and can change at any time.		1
FilteredSubscriber		interface	PHPUnit\Event\TestSuite	vendor/phpunit/phpunit/src/Event/Events/TestSuite/FilteredSubscriber.php	@no-named-arguments Parameter names are not covered by the backward compatibility promise for PHPUnit
FilterEnableForm		class	Drupal\filter\Form	core/modules/filter/src/Form/FilterEnableForm.php	Provides the filter format enable form.		1
FilterExpression		class	Twig\Node\Expression	vendor/twig/twig/src/Node/Expression/FilterExpression.php		2	9
FilterFormat		class	Drupal\filter\Plugin\DataType	core/modules/filter/src/Plugin/DataType/FilterFormat.php	The filter format data type.
FilterFormat		class	Drupal\filter\Entity	core/modules/filter/src/Entity/FilterFormat.php	Represents a text format.		4
FilterFormat		class	Drupal\filter\Plugin\migrate\source\d6	core/modules/filter/src/Plugin/migrate/source/d6/FilterFormat.php	Drupal 6 filter source from database.
FilterFormat		class	Drupal\filter\Plugin\migrate\source\d7	core/modules/filter/src/Plugin/migrate/source/d7/FilterFormat.php	Drupal 7 filter source from database.
FilterFormatAccessControlHandler		class	Drupal\filter	core/modules/filter/src/FilterFormatAccessControlHandler.php	Defines the access control handler for the filter format entity type.		1
FilterFormatAddForm		class	Drupal\filter	core/modules/filter/src/FilterFormatAddForm.php	Provides a form for adding a filter format.		1
FilterFormatEditForm		class	Drupal\filter	core/modules/filter/src/FilterFormatEditForm.php	Provides a form for adding a filter format.		1
FilterFormatFormBase		abstract class	Drupal\filter	core/modules/filter/src/FilterFormatFormBase.php	Provides a base form for a filter format.	2
FilterFormatInterface		interface	Drupal\filter	core/modules/filter/src/FilterFormatInterface.php	Provides an interface defining a filter format entity.	1	16
FilterFormatListBuilder		class	Drupal\filter	core/modules/filter/src/FilterFormatListBuilder.php	Defines a class to build a listing of filter format entities.		1
FilterFormatPermission		class	Drupal\filter\Plugin\migrate\process\d6	core/modules/filter/src/Plugin/migrate/process/d6/FilterFormatPermission.php	Migrate filter format serial to string id in permission name.
FilterHooks		class	Drupal\filter\Hook	core/modules/filter/src/Hook/FilterHooks.php	Hook implementations for filter.
FilterHtml		class	Drupal\filter\Plugin\Filter	core/modules/filter/src/Plugin/Filter/FilterHtml.php	Provides a filter to limit allowed HTML tags.		1
FilterHtmlCorrector		class	Drupal\filter\Plugin\Filter	core/modules/filter/src/Plugin/Filter/FilterHtmlCorrector.php	Provides a filter to correct faulty and chopped off HTML.
FilterHtmlEscape		class	Drupal\filter\Plugin\Filter	core/modules/filter/src/Plugin/Filter/FilterHtmlEscape.php	Provides a filter to display any HTML as plain text.
FilterHtmlImageSecure		class	Drupal\filter\Plugin\Filter	core/modules/filter/src/Plugin/Filter/FilterHtmlImageSecure.php	Provides a filter to restrict images to site.
FilterID		class	Drupal\filter\Plugin\migrate\process	core/modules/filter/src/Plugin/migrate/process/FilterID.php	Determines the filter ID.
FilterImageLazyLoad		final class	Drupal\filter\Plugin\Filter	core/modules/filter/src/Plugin/Filter/FilterImageLazyLoad.php	Provides a filter to lazy load tracked images.
FilterInterface		interface	Drupal\Core\Routing	core/lib/Drupal/Core/Routing/FilterInterface.php	A route filter service to filter down the collection of route instances.	4	1
FilterInterface		interface	Drupal\filter\Plugin	core/modules/filter/src/Plugin/FilterInterface.php	Defines the interface for text processing filter plugins.	1	18	1
FilterNotConfiguredException		final class	PHPUnit\TextUI\Configuration	vendor/phpunit/phpunit/src/TextUI/Configuration/Exception/FilterNotConfiguredException.php	@no-named-arguments Parameter names are not covered by the backward compatibility promise for PHPUnit		1
FilterNull		class	Drupal\filter\Plugin\Filter	core/modules/filter/src/Plugin/Filter/FilterNull.php	Provides a fallback placeholder filter to use for missing filters.		1
FilterOperatorsInterface		interface	Drupal\views\Plugin\views\filter	core/modules/views/src/Plugin/views/filter/FilterOperatorsInterface.php	Provides an interface for all views filters that implement operators.	4
FilterPermissions		class	Drupal\filter	core/modules/filter/src/FilterPermissions.php	Provides dynamic permissions of the filter module.
FilterPluginBase		abstract class	Drupal\views\Plugin\views\filter	core/modules/views/src/Plugin/views/filter/FilterPluginBase.php	Base class for Views filters handler plugins.	15	6
FilterPluginCollection		class	Drupal\filter	core/modules/filter/src/FilterPluginCollection.php	A collection of filters.		2
FilterPluginManager		class	Drupal\filter	core/modules/filter/src/FilterPluginManager.php	Manages text processing filters.		2	2
FilterProcessResult		class	Drupal\filter	core/modules/filter/src/FilterProcessResult.php	Used to return values from a text filter plugin's processing method.		13
FilterRepository		class	Composer\Repository	vendor/composer/composer/src/Composer/Repository/FilterRepository.php	Filters which packages are seen as canonical on this repo by loadPackages		1
FilterSettings		class	Drupal\filter\Plugin\migrate\process	core/modules/filter/src/Plugin/migrate/process/FilterSettings.php	Adds the default allowed attributes to filter_html's allowed_html setting.