Classes, traits, and interfaces - 10.3.x - 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 1518

Name	Deprecated	Object type	Namespace	File name	Summary	Direct uses	Use statements	Strings
FieldInstanceTest		class	Drupal\Tests\field\Kernel\Plugin\migrate\source\d7	core/modules/field/tests/src/Kernel/Plugin/migrate/source/d7/FieldInstanceTest.php	Tests D7 field instance source plugin.
FieldInstanceWidgetSettings		class	Drupal\field\Plugin\migrate\process\d6	core/modules/field/src/Plugin/migrate/process/d6/FieldInstanceWidgetSettings.php	Get the field instance widget settings.
FieldItem		abstract class	Drupal\Core\Field\Plugin\DataType	core/lib/Drupal/Core/Field/Plugin/DataType/FieldItem.php	Defines the base plugin for deriving data types for field types.
FieldItemBase		abstract class	Drupal\Core\Field	core/lib/Drupal/Core/Field/FieldItemBase.php	An entity field item.	26	28
FieldItemDataDefinition		class	Drupal\Core\Field\TypedData	core/lib/Drupal/Core/Field/TypedData/FieldItemDataDefinition.php	A typed data definition class for defining field items.		7
FieldItemDataDefinitionInterface		interface	Drupal\Core\Field\TypedData	core/lib/Drupal/Core/Field/TypedData/FieldItemDataDefinitionInterface.php	Interface for field item data definitions.	1	3
FieldItemDeriver		class	Drupal\Core\Field\Plugin\DataType\Deriver	core/lib/Drupal/Core/Field/Plugin/DataType/Deriver/FieldItemDeriver.php	Provides data type plugins for each existing field type plugin.		1
FieldItemInterface		interface	Drupal\Core\Field	core/lib/Drupal/Core/Field/FieldItemInterface.php	Interface for entity field items.	2	34	2
FieldItemList		class	Drupal\Core\Field	core/lib/Drupal/Core/Field/FieldItemList.php	Represents an entity field; that is, a list of field item objects.	13	15
FieldItemListInterface		interface	Drupal\Core\Field	core/lib/Drupal/Core/Field/FieldItemListInterface.php	Interface for fields, being lists of field items.	2	146
FieldItemListTest		class	Drupal\Tests\Core\Field	core/tests/Drupal/Tests/Core/Field/FieldItemListTest.php	@coversDefaultClass \Drupal\Core\Field\FieldItemList[[api-linebreak]] @group Field
FieldItemNormalizer		class	Drupal\jsonapi\Normalizer	core/modules/jsonapi/src/Normalizer/FieldItemNormalizer.php	Converts the Drupal field item object to a JSON:API array structure.		1	2
FieldItemNormalizer		class	Drupal\serialization\Normalizer	core/modules/serialization/src/Normalizer/FieldItemNormalizer.php	Denormalizes field item object structure by updating the entity field values.	5	3	2
FieldItemNormalizerTest		class	Drupal\Tests\jsonapi\Kernel\Normalizer	core/modules/jsonapi/tests/src/Kernel/Normalizer/FieldItemNormalizerTest.php	@coversDefaultClass \Drupal\jsonapi\Normalizer\FieldItemNormalizer[[api-linebreak]] @group jsonapi
FieldItemSerializationTest		class	Drupal\Tests\serialization\Kernel	core/modules/serialization/tests/src/Kernel/FieldItemSerializationTest.php	Test field level normalization process.
FieldItemTest		class	Drupal\KernelTests\Core\Field	core/tests/Drupal/KernelTests/Core/Field/FieldItemTest.php	Test field item methods.
FieldItemTestClass		class	Drupal\Tests\Core\Field	core/tests/Drupal/Tests/Core/Field/FieldItemListTest.php	A class extending FieldItemBase for testing purposes.
FieldKernelTest		class	Drupal\Tests\views\Kernel\Handler	core/modules/views/tests/src/Kernel/Handler/FieldKernelTest.php	Tests the generic field handler.
FieldKernelTestBase		abstract class	Drupal\Tests\field\Kernel	core/modules/field/tests/src/Kernel/FieldKernelTestBase.php	Parent class for Field API unit tests.	42	20
FieldLabelDescriptionTranslation		class	Drupal\field\Plugin\migrate\source\d6	core/modules/field/src/Plugin/migrate/source/d6/FieldLabelDescriptionTranslation.php	Drupal 6 i18n field label and description source from database.
FieldLabelDescriptionTranslation		class	Drupal\field\Plugin\migrate\source\d7	core/modules/field/src/Plugin/migrate/source/d7/FieldLabelDescriptionTranslation.php	Drupal 7 i18n field label and description source from database.
FieldLabelOptionsTrait		trait	Drupal\field	core/modules/field/src/FieldLabelOptionsTrait.php	Provides a trait for the valid field label options.		2
FieldLanguage		class	Drupal\views\Plugin\views\field	core/modules/views/src/Plugin/views/field/FieldLanguage.php	Displays the language of an entity.
FieldLanguageTest		class	Drupal\Tests\language\Kernel\Views	core/modules/language/tests/src/Kernel/Views/FieldLanguageTest.php	Tests the field language handler.
FieldLayoutBuilder		class	Drupal\field_layout	core/modules/field_layout/src/FieldLayoutBuilder.php	Builds a field layout.		3
FieldLayoutBuilderTest		class	Drupal\Tests\field_layout\Unit	core/modules/field_layout/tests/src/Unit/FieldLayoutBuilderTest.php	@coversDefaultClass \Drupal\field_layout\FieldLayoutBuilder[[api-linebreak]] @group field_layout
FieldLayoutEntityDisplayFormTrait		trait	Drupal\field_layout\Form	core/modules/field_layout/src/Form/FieldLayoutEntityDisplayFormTrait.php	Provides shared code for entity display forms.
FieldLayoutEntityDisplayTest		class	Drupal\Tests\field_layout\Kernel	core/modules/field_layout/tests/src/Kernel/FieldLayoutEntityDisplayTest.php	@coversDefaultClass \Drupal\field_layout\Entity\FieldLayoutEntityDisplayTrait[[api-linebreak]] @group field_layout
FieldLayoutEntityDisplayTrait		trait	Drupal\field_layout\Entity	core/modules/field_layout/src/Entity/FieldLayoutEntityDisplayTrait.php	Provides shared code for entity displays.
FieldLayoutEntityFormDisplay		class	Drupal\field_layout\Entity	core/modules/field_layout/src/Entity/FieldLayoutEntityFormDisplay.php	Provides an entity form display entity that has a layout.		1
FieldLayoutEntityFormDisplayEditForm		class	Drupal\field_layout\Form	core/modules/field_layout/src/Form/FieldLayoutEntityFormDisplayEditForm.php	Edit form for the EntityFormDisplay entity type.		1
FieldLayoutEntityViewDisplay		class	Drupal\field_layout\Entity	core/modules/field_layout/src/Entity/FieldLayoutEntityViewDisplay.php	Provides an entity view display entity that has a layout.		2
FieldLayoutEntityViewDisplayEditForm		class	Drupal\field_layout\Form	core/modules/field_layout/src/Form/FieldLayoutEntityViewDisplayEditForm.php	Edit form for the EntityViewDisplay entity type.		1
FieldLayoutTest		class	Drupal\Tests\field_layout\FunctionalJavascript	core/modules/field_layout/tests/src/FunctionalJavascript/FieldLayoutTest.php	Tests using field layout for entity displays.
FieldLayoutTest		class	Drupal\Tests\field_layout\Functional	core/modules/field_layout/tests/src/Functional/FieldLayoutTest.php	Tests using field layout for entity displays.
FieldLayoutUninstallTest		class	Drupal\Tests\field_layout\Kernel	core/modules/field_layout/tests/src/Kernel/FieldLayoutUninstallTest.php	@group field_layout
FieldLink		class	Drupal\link\Plugin\migrate\process	core/modules/link/src/Plugin/migrate/process/FieldLink.php	Transform a pre-Drupal 8 formatted link for use in Drupal 8.		1
FieldLinkTest		class	Drupal\Tests\link\Unit\Plugin\migrate\process	core/modules/link/tests/src/Unit/Plugin/migrate/process/FieldLinkTest.php	@group Link
FieldMigration		class	Drupal\migrate_drupal\Plugin\migrate	core/modules/migrate_drupal/src/Plugin/migrate/FieldMigration.php	Migration plugin class for migrations dealing with field config and values.	2	2	9
FieldMissingTypeTest		class	Drupal\KernelTests\Core\Field	core/tests/Drupal/KernelTests/Core/Field/FieldMissingTypeTest.php	Tests the exception when missing a field type.
FieldNormalizer		class	Drupal\jsonapi\Normalizer	core/modules/jsonapi/src/Normalizer/FieldNormalizer.php	Converts the Drupal field structure to a JSON:API array structure.	1		2
FieldNormalizer		class	Drupal\serialization\Normalizer	core/modules/serialization/src/Normalizer/FieldNormalizer.php	Denormalizes data to Drupal field values.			2
FieldNumericTest		class	Drupal\Tests\views\Kernel\Handler	core/modules/views/tests/src/Kernel/Handler/FieldNumericTest.php	Tests the core Drupal\views\Plugin\views\field\Numeric handler.
FieldOptionTranslation		class	Drupal\field\Plugin\migrate\source\d6	core/modules/field/src/Plugin/migrate/source/d6/FieldOptionTranslation.php	Drupal 6 i18n field option labels source from database.	1
FieldOptionTranslation		class	Drupal\field\Plugin\migrate\source\d7	core/modules/field/src/Plugin/migrate/source/d7/FieldOptionTranslation.php	Drupal 7 i18n field option label source from database.
FieldOptionTranslation		class	Drupal\field\Plugin\migrate\process\d6	core/modules/field/src/Plugin/migrate/process/d6/FieldOptionTranslation.php	Determines the allowed values translation for select lists.
FieldOptionTranslation		class	Drupal\field\Plugin\migrate\process\d7	core/modules/field/src/Plugin/migrate/process/d7/FieldOptionTranslation.php	Determines the allowed values translation for select lists.
FieldOptionTranslationTest		class	Drupal\Tests\field\Kernel\Plugin\migrate\source\d6	core/modules/field/tests/src/Kernel/Plugin/migrate/source/d6/FieldOptionTranslationTest.php	Tests the field option translation source plugin.	1
FieldOptionTranslationTest		class	Drupal\Tests\field\Kernel\Plugin\migrate\source\d7	core/modules/field/tests/src/Kernel/Plugin/migrate/source/d7/FieldOptionTranslationTest.php	Tests the field option translation source plugin.
FieldOrLanguageJoin		class	Drupal\views\Plugin\views\join	core/modules/views/src/Plugin/views/join/FieldOrLanguageJoin.php	Implementation for the "field OR language" join.		1

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