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
LanguageConfigOverrideCrudEvent		class	Drupal\language\Config	core/modules/language/src/Config/LanguageConfigOverrideCrudEvent.php	Provides a language override event for event listeners.		1
LanguageConfigOverrideEvents		final class	Drupal\language\Config	core/modules/language/src/Config/LanguageConfigOverrideEvents.php	Defines events for language configuration overrides.		1
LanguageConfiguration		class	Drupal\language\Element	core/modules/language/src/Element/LanguageConfiguration.php	Defines an element for language configuration for a single field.
LanguageConstructSpacingSniff		class	PHP_CodeSniffer\Standards\Squiz\Sniffs\WhiteSpace	vendor/squizlabs/php_codesniffer/src/Standards/Squiz/Sniffs/WhiteSpace/LanguageConstructSpacingSniff.php
LanguageConstructSpacingSniff		class	PHP_CodeSniffer\Standards\Generic\Sniffs\WhiteSpace	vendor/squizlabs/php_codesniffer/src/Standards/Generic/Sniffs/WhiteSpace/LanguageConstructSpacingSniff.php
LanguageConstructWithParenthesesSniff		class	SlevomatCodingStandard\Sniffs\ControlStructures	vendor/slevomat/coding-standard/SlevomatCodingStandard/Sniffs/ControlStructures/LanguageConstructWithParenthesesSniff.php
LanguageContentSettings		class	Drupal\language\Plugin\migrate\source\d6	core/modules/language/src/Plugin/migrate/source/d6/LanguageContentSettings.php	Drupal 6 i18n node settings from database.
LanguageContentSettings		class	Drupal\language\Plugin\migrate\source\d7	core/modules/language/src/Plugin/migrate/source/d7/LanguageContentSettings.php	Drupal 7 i18n node settings from database.
LanguageContentSettingsTaxonomyVocabulary		class	Drupal\language\Plugin\migrate\source\d6	core/modules/language/src/Plugin/migrate/source/d6/LanguageContentSettingsTaxonomyVocabulary.php	Drupal 6 i18n vocabularies source from database.
LanguageContentSettingsTaxonomyVocabulary		class	Drupal\language\Plugin\migrate\source\d7	core/modules/language/src/Plugin/migrate/source/d7/LanguageContentSettingsTaxonomyVocabulary.php	Drupal 7 i18n vocabularies source from database.
LanguageConverter		class	Drupal\language\ProxyClass	core/modules/language/src/ProxyClass/LanguageConverter.php	Provides a proxy class for \Drupal\language\LanguageConverter.
LanguageConverter		class	Drupal\language	core/modules/language/src/LanguageConverter.php	Converts parameters for upcasting entity IDs to full objects.			2
LanguageDefault		class	Drupal\Core\Language	core/lib/Drupal/Core/Language/LanguageDefault.php	Provides a simple get and set wrapper to the default language object.		5
LanguageDeleteForm		class	Drupal\language\Form	core/modules/language/src/Form/LanguageDeleteForm.php	Defines a confirmation form for deleting a language entity.		1
LanguageDomains		class	Drupal\language\Plugin\migrate\process	core/modules/language/src/Plugin/migrate/process/LanguageDomains.php	This plugin makes sure that no domain is empty if domain negotiation is used.
LanguageEditForm		class	Drupal\language\Form	core/modules/language/src/Form/LanguageEditForm.php	Controller for language edit forms.		1
LanguageException		class	Drupal\language\Exception	core/modules/language/src/Exception/LanguageException.php	A base exception thrown in any language system operations.	1
LanguageField		class	Drupal\views\Plugin\views\field	core/modules/views/src/Plugin/views/field/LanguageField.php	Defines a field handler to translate a language into its readable form.
LanguageFilter		class	Drupal\views\Plugin\views\filter	core/modules/views/src/Plugin/views/filter/LanguageFilter.php	Provides filtering by language.
LanguageFormatter		class	Drupal\Core\Field\Plugin\Field\FieldFormatter	core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/LanguageFormatter.php	Plugin implementation of the 'language' formatter.
LanguageFormBase		abstract class	Drupal\language\Form	core/modules/language/src/Form/LanguageFormBase.php	Base form for language add and edit forms.	2
LanguageHooks		class	Drupal\language\Hook	core/modules/language/src/Hook/LanguageHooks.php	Hook implementations for language.
LanguageInterface		interface	Drupal\Core\Language	core/lib/Drupal/Core/Language/LanguageInterface.php	Defines an interface for languages.	2	105
LanguageItem		class	Drupal\Core\Field\Plugin\Field\FieldType	core/lib/Drupal/Core/Field/Plugin/Field/FieldType/LanguageItem.php	Defines the 'language' entity field item.	1	1
LanguageListBuilder		class	Drupal\language	core/modules/language/src/LanguageListBuilder.php	Defines a class to build a listing of language entities.		1
LanguageManager		class	Drupal\Core\Language	core/lib/Drupal/Core/Language/LanguageManager.php	Class responsible for providing language support on language-unaware sites.	1	7
LanguageManagerInterface		interface	Drupal\Core\Language	core/lib/Drupal/Core/Language/LanguageManagerInterface.php	Common interface for the language manager service.	2	92
LanguageNegotiation		class	Drupal\language\Attribute	core/modules/language/src/Attribute/LanguageNegotiation.php	Defines a language negotiation attribute object.		10
LanguageNegotiation		class	Drupal\language\Annotation	core/modules/language/src/Annotation/LanguageNegotiation.php	Defines a language negotiation annotation object.
LanguageNegotiation		class	Drupal\language\Plugin\migrate\process	core/modules/language/src/Plugin/migrate/process/LanguageNegotiation.php	Processes the arrays for the language types' negotiation methods and weights.
LanguageNegotiationBrowser		class	Drupal\language\Plugin\LanguageNegotiation	core/modules/language/src/Plugin/LanguageNegotiation/LanguageNegotiationBrowser.php	Class for identifying language from the browser Accept-language HTTP header.
LanguageNegotiationContentEntity		class	Drupal\language\Plugin\LanguageNegotiation	core/modules/language/src/Plugin/LanguageNegotiation/LanguageNegotiationContentEntity.php	Class for identifying the content translation language.
LanguageNegotiationMethodBase		abstract class	Drupal\language	core/modules/language/src/LanguageNegotiationMethodBase.php	Base class for language negotiation methods.	9	9
LanguageNegotiationMethodInterface		interface	Drupal\language	core/modules/language/src/LanguageNegotiationMethodInterface.php	Interface for language negotiation classes.	1
LanguageNegotiationMethodManager		class	Drupal\language	core/modules/language/src/LanguageNegotiationMethodManager.php	Manages language negotiation methods.			2
LanguageNegotiationSelected		class	Drupal\language\Plugin\LanguageNegotiation	core/modules/language/src/Plugin/LanguageNegotiation/LanguageNegotiationSelected.php	Class for identifying language from a selected language.		1
LanguageNegotiationSession		class	Drupal\language\Plugin\LanguageNegotiation	core/modules/language/src/Plugin/LanguageNegotiation/LanguageNegotiationSession.php	Identify language from a request/session parameter.
LanguageNegotiationUI		class	Drupal\language\Plugin\LanguageNegotiation	core/modules/language/src/Plugin/LanguageNegotiation/LanguageNegotiationUI.php	Identifies the language from the interface text language selected for page.		2
LanguageNegotiationUrl		class	Drupal\language\Plugin\LanguageNegotiation	core/modules/language/src/Plugin/LanguageNegotiation/LanguageNegotiationUrl.php	Class for identifying language via URL prefix or domain.		2
LanguageNegotiationUrlFallback		class	Drupal\language\Plugin\LanguageNegotiation	core/modules/language/src/Plugin/LanguageNegotiation/LanguageNegotiationUrlFallback.php	Determines the language to be assigned to URLs when none is detected.		1
LanguageNegotiationUser		class	Drupal\user\Plugin\LanguageNegotiation	core/modules/user/src/Plugin/LanguageNegotiation/LanguageNegotiationUser.php	Class for identifying language from the user preferences.		1
LanguageNegotiationUserAdmin		class	Drupal\user\Plugin\LanguageNegotiation	core/modules/user/src/Plugin/LanguageNegotiation/LanguageNegotiationUserAdmin.php	Identifies admin language from the user preferences.		1
LanguageNegotiator		class	Drupal\language	core/modules/language/src/LanguageNegotiator.php	Class responsible for performing language negotiation.			2
LanguageNegotiatorInterface		interface	Drupal\language	core/modules/language/src/LanguageNegotiatorInterface.php	Common interface for language negotiation services.	1	4
LanguageNoneSniff		class	DrupalPractice\Sniffs\General	vendor/drupal/coder/coder_sniffer/DrupalPractice/Sniffs/General/LanguageNoneSniff.php	Checks that ['und'] is not used, should be LANGUAGE_NONE.
LanguageReference		class	Drupal\Core\TypedData\Plugin\DataType	core/lib/Drupal/Core/TypedData/Plugin/DataType/LanguageReference.php	Defines the 'language_reference' data type.
LanguageRequestSubscriber		class	Drupal\language\EventSubscriber	core/modules/language/src/EventSubscriber/LanguageRequestSubscriber.php	Sets the $request property on the language manager.
LanguagesCacheContext		class	Drupal\Core\Cache\Context	core/lib/Drupal/Core/Cache/Context/LanguagesCacheContext.php	Defines the LanguagesCacheContext service, for "per language" caching.
LanguageSelect		class	Drupal\Core\Render\Element	core/lib/Drupal/Core/Render/Element/LanguageSelect.php	Provides a form element for selecting a language.
LanguageSelectWidget		class	Drupal\Core\Field\Plugin\Field\FieldWidget	core/lib/Drupal/Core/Field/Plugin/Field/FieldWidget/LanguageSelectWidget.php	Plugin implementation of the 'Language' widget.