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
LinkApprove		class	Drupal\comment\Plugin\views\field	core/modules/comment/src/Plugin/views/field/LinkApprove.php	Provides a comment approve link.		1
LinkApproveTest		class	Drupal\Tests\comment\Unit\Plugin\views\field	core/modules/comment/tests/src/Unit/Plugin/views/field/LinkApproveTest.php	Tests Drupal\comment\Plugin\views\field\LinkApprove.
LinkBase		abstract class	Drupal\views\Plugin\views\field	core/modules/views/src/Plugin/views/field/LinkBase.php	Field handler to present a link to an entity.	5	5
LinkBaseTest		class	Drupal\Tests\views\Unit\Plugin\views\field	core/modules/views/tests/src/Unit/Plugin/views/field/LinkBaseTest.php	Tests Drupal\views\Plugin\views\field\EntityLink.
LinkCollection		final class	Drupal\jsonapi\JsonApiResource	core/modules/jsonapi/src/JsonApiResource/LinkCollection.php	Contains a set of JSON:API Link objects.		9
LinkCollectionNormalizer		class	Drupal\jsonapi\Normalizer	core/modules/jsonapi/src/Normalizer/LinkCollectionNormalizer.php	Normalizes a LinkCollection object.		1	2
LinkCollectionNormalizerTest		class	Drupal\Tests\jsonapi\Kernel\Normalizer	core/modules/jsonapi/tests/src/Kernel/Normalizer/LinkCollectionNormalizerTest.php	Tests Drupal\jsonapi\Normalizer\LinkCollectionNormalizer.
LinkExternalProtocolsConstraint		class	Drupal\link\Plugin\Validation\Constraint	core/modules/link/src/Plugin/Validation/Constraint/LinkExternalProtocolsConstraint.php	Defines a protocol validation constraint for links to external URLs.		1
LinkExternalProtocolsConstraintValidator		class	Drupal\link\Plugin\Validation\Constraint	core/modules/link/src/Plugin/Validation/Constraint/LinkExternalProtocolsConstraintValidator.php	Validates the LinkExternalProtocols constraint.		1
LinkExternalProtocolsConstraintValidatorTest		class	Drupal\Tests\link\Unit\Plugin\Validation\Constraint	core/modules/link/tests/src/Unit/Plugin/Validation/Constraint/LinkExternalProtocolsConstraintValidatorTest.php	Tests Drupal\link\Plugin\Validation\Constraint\LinkExternalProtocolsConstraintValidator.
LinkField		class	Drupal\link\Plugin\migrate\field\d6	core/modules/link/src/Plugin/migrate/field/d6/LinkField.php	Migrate field plugin for Drupal 6 link fields.	1	2
LinkField		class	Drupal\link\Plugin\migrate\field\d7	core/modules/link/src/Plugin/migrate/field/d7/LinkField.php	MigrateField Plugin for Drupal 7 link fields.		1
LinkFieldFormStatesTest		class	Drupal\Tests\link\FunctionalJavascript	core/modules/link/tests/src/FunctionalJavascript/LinkFieldFormStatesTest.php	Tests link field form states functionality.
LinkFieldTest		class	Drupal\Tests\link\Unit\Plugin\migrate\field\d6	core/modules/link/tests/src/Unit/Plugin/migrate/field/d6/LinkFieldTest.php	Tests Drupal\link\Plugin\migrate\field\d6\LinkField.
LinkFieldTest		class	Drupal\Tests\link\Kernel\Plugin\migrate\field\d7	core/modules/link/tests/src/Kernel/Plugin/migrate/field/d7/LinkFieldTest.php	Tests Drupal\link\Plugin\migrate\field\d7\LinkField.
LinkFieldTest		class	Drupal\Tests\link\Functional	core/modules/link/tests/src/Functional/LinkFieldTest.php	Tests link field widgets and formatters.
LinkFieldUITest		class	Drupal\Tests\link\Functional	core/modules/link/tests/src/Functional/LinkFieldUITest.php	Tests link field UI functionality.
LinkFieldWidgetTest		class	Drupal\Tests\link\Kernel	core/modules/link/tests/src/Kernel/LinkFieldWidgetTest.php	Tests link field widgets.
LinkFormatter		class	Drupal\link\Plugin\Field\FieldFormatter	core/modules/link/src/Plugin/Field/FieldFormatter/LinkFormatter.php	Plugin implementation of the 'link' formatter.	1	1
LinkFormatterDisplayTest		class	Drupal\Tests\link\Kernel	core/modules/link/tests/src/Kernel/LinkFormatterDisplayTest.php	Tests the default 'link' field formatter.
LinkFormatterTest		class	Drupal\Tests\link\Unit	core/modules/link/tests/src/Unit/LinkFormatterTest.php	Tests the Field Formatter for the link field type.
LinkFormatterTest		class	Drupal\Tests\link\Kernel	core/modules/link/tests/src/Kernel/LinkFormatterTest.php	Tests the Field Formatter for the link field type.
LinkGenerationTest		class	Drupal\KernelTests\Core\Url	core/tests/Drupal/KernelTests/Core/Url/LinkGenerationTest.php	Tests link generation with hooks.
LinkGenerationTestHooks		class	Drupal\link_generation_test\Hook	core/modules/system/tests/modules/link_generation_test/src/Hook/LinkGenerationTestHooks.php	Hook implementations for link_generation_test.
LinkGenerator		class	Drupal\Core\Utility	core/lib/Drupal/Core/Utility/LinkGenerator.php	Provides a class which generates a link with route names and parameters.		3	2
LinkGeneratorInterface		interface	Drupal\Core\Utility	core/lib/Drupal/Core/Utility/LinkGeneratorInterface.php	Defines an interface for generating links from route names and parameters.	1	5
LinkGeneratorTest		class	Drupal\Tests\Core\Utility	core/tests/Drupal/Tests/Core/Utility/LinkGeneratorTest.php	Tests Drupal\Core\Utility\LinkGenerator.
LinkHooks		class	Drupal\link\Hook	core/modules/link/src/Hook/LinkHooks.php	Hook implementations for link.
LinkInputValuesTraits		trait	Drupal\Tests\link\Traits	core/modules/link/tests/src/Traits/LinkInputValuesTraits.php	Provides test values for the Link field.		2
LinkItem		class	Drupal\link\Plugin\Field\FieldType	core/modules/link/src/Plugin/Field/FieldType/LinkItem.php	Plugin implementation of the 'link' field type.		1
LinkItemInterface		interface	Drupal\link	core/modules/link/src/LinkItemInterface.php	Defines an interface for the link field item.	1	27
LinkItemSerializationTest		class	Drupal\Tests\link\Kernel	core/modules/link/tests/src/Kernel/LinkItemSerializationTest.php	Tests link field serialization.
LinkItemTest		class	Drupal\Tests\link\Kernel	core/modules/link/tests/src/Kernel/LinkItemTest.php	Tests the new entity API for the link field type.
LinkItemUrlValidationTest		class	Drupal\Tests\link\Kernel	core/modules/link/tests/src/Kernel/LinkItemUrlValidationTest.php	Tests link field validation.
LinkNotExistingInternalConstraint		class	Drupal\link\Plugin\Validation\Constraint	core/modules/link/src/Plugin/Validation/Constraint/LinkNotExistingInternalConstraint.php	Defines a protocol validation constraint for links to broken internal URLs.		1
LinkNotExistingInternalConstraintValidator		class	Drupal\link\Plugin\Validation\Constraint	core/modules/link/src/Plugin/Validation/Constraint/LinkNotExistingInternalConstraintValidator.php	Validates the LinkNotExistingInternal constraint.		1
LinkNotExistingInternalConstraintValidatorTest		class	Drupal\Tests\link\Unit\Plugin\Validation\Constraint	core/modules/link/tests/src/Unit/Plugin/Validation/Constraint/LinkNotExistingInternalConstraintValidatorTest.php	Tests Drupal\link\Plugin\Validation\Constraint\LinkNotExistingInternalConstraintValidator.
LinkOptions		class	Drupal\migrate\Plugin\migrate\process	core/modules/migrate/src/Plugin/migrate/process/LinkOptions.php	Converts links options.
LinkOptions	in drupal:11.4.0 and is removed from drupal:13.0.0. Use \Drupal\migrate\Plugin\migrate\process\LinkOptions instead. Examples:	class	Drupal\menu_link_content\Plugin\migrate\process	core/modules/menu_link_content/src/Plugin/migrate/process/LinkOptions.php	Converts links options.
LinkRelationsTest		class	Drupal\KernelTests\Core\Http	core/tests/Drupal/KernelTests/Core/Http/LinkRelationsTest.php	Tests link relationships in Drupal.
LinkRelationType		class	Drupal\Core\Http	core/lib/Drupal/Core/Http/LinkRelationType.php	Defines a single link relationship type.		1
LinkRelationTypeInterface		interface	Drupal\Core\Http	core/lib/Drupal/Core/Http/LinkRelationTypeInterface.php	Defines a single link relation type.	1
LinkRelationTypeManager		class	Drupal\Core\Http	core/lib/Drupal/Core/Http/LinkRelationTypeManager.php	Provides a default plugin manager for link relation types.			2
LinkReply		class	Drupal\comment\Plugin\views\field	core/modules/comment/src/Plugin/views/field/LinkReply.php	Field handler to present a link to reply to a comment.		1
LinkReplyTest		class	Drupal\Tests\comment\Unit\Plugin\views\field	core/modules/comment/tests/src/Unit/Plugin/views/field/LinkReplyTest.php	Tests Drupal\comment\Plugin\views\field\LinkReply.
LinkResolvableUriComputed		class	Drupal\link\Plugin\DataType	core/modules/link/src/Plugin/DataType/LinkResolvableUriComputed.php	Defines a data type for a Link Resolvable URI.
Links		abstract class	Drupal\views\Plugin\views\field	core/modules/views/src/Plugin/views/field/Links.php	An abstract handler which provides a collection of links.	1
LinkSeparateFormatter		class	Drupal\link\Plugin\Field\FieldFormatter	core/modules/link/src/Plugin/Field/FieldFormatter/LinkSeparateFormatter.php	Plugin implementation of the 'link_separate' formatter.
LinkSeparateFormatterDisplayTest		class	Drupal\Tests\link\Kernel	core/modules/link/tests/src/Kernel/LinkSeparateFormatterDisplayTest.php	Tests the 'link_separate' field formatter.
LinksetController		final class	Drupal\system\Controller	core/modules/system/src/Controller/LinksetController.php	Linkset controller.

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