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
ExecutionContextFactory		class	Drupal\Core\Validation	core/lib/Drupal/Core/Validation/ExecutionContextFactory.php	Defines an execution factory for the Symfony validator.		3
ExistingDrupal8StyleDatabaseConnectionInSettingsPhpTest		class	Drupal\FunctionalTests	core/tests/Drupal/FunctionalTests/ExistingDrupal8StyleDatabaseConnectionInSettingsPhpTest.php	Tests Existing Drupal8Style Database Connection In Settings Php.
ExpectDeprecationTest		class	Drupal\Tests	core/tests/Drupal/Tests/ExpectDeprecationTest.php	Ensures test coverage for deprecation testing.
ExpectDeprecationTrait	in drupal:11.4.0 and is removed from drupal:12.0.0. Use $this->expectUserDeprecationMessage() or $this->expectUserDeprecationMessageMatches() instead.	trait	Drupal\TestTools\Extension\DeprecationBridge	core/tests/Drupal/TestTools/Extension/DeprecationBridge/ExpectDeprecationTrait.php	A trait to include in Drupal tests to manage expected deprecations.		1
ExperimentalHelpTest		class	Drupal\Tests\help\Kernel	core/modules/help/tests/src/Kernel/ExperimentalHelpTest.php	Verifies help for experimental modules.
ExperimentalHelpTest		class	Drupal\Tests\help\Functional	core/modules/help/tests/src/Functional/ExperimentalHelpTest.php	Verifies help for experimental modules.
ExperimentalModuleRequirementsTestHooks		class	Drupal\experimental_module_requirements_test\Hook	core/modules/system/tests/modules/experimental_module_requirements_test/src/Hook/ExperimentalModuleRequirementsTestHooks.php	Hook implementations for experimental_module_requirements_test.
ExperimentalModuleRequirementsTestRequirements		class	Drupal\experimental_module_requirements_test\Install\Requirements	core/modules/system/tests/modules/experimental_module_requirements_test/src/Install/Requirements/ExperimentalModuleRequirementsTestRequirements.php	Install time requirements for the Experimental Requirements Test module.
ExperimentalModuleTestHooks		class	Drupal\experimental_module_test\Hook	core/modules/system/tests/modules/experimental_module_test/src/Hook/ExperimentalModuleTestHooks.php	Hook implementations for experimental_module_test.
ExperimentalThemeTest		class	Drupal\Tests\system\Functional\Theme	core/modules/system/tests/src/Functional/Theme/ExperimentalThemeTest.php	Tests the installation of experimental themes.
Explode		class	Drupal\migrate\Plugin\migrate\process	core/modules/migrate/src/Plugin/migrate/process/Explode.php	Splits the source string into an array of strings, using a delimiter.		1
ExplodeTest		class	Drupal\Tests\migrate\Unit\process	core/modules/migrate/tests/src/Unit/process/ExplodeTest.php	Tests the Explode process plugin.
Exporter		final class	Drupal\Core\DefaultContent	core/lib/Drupal/Core/DefaultContent/Exporter.php	Handles exporting content entities.		3
ExportForm		class	Drupal\locale\Form	core/modules/locale/src/Form/ExportForm.php	Form for the Gettext translation files export form.			1
ExportMetadata		final class	Drupal\Core\DefaultContent	core/lib/Drupal/Core/DefaultContent/ExportMetadata.php	Collects metadata about an entity being exported.		2
ExportResult		final class	Drupal\Core\DefaultContent	core/lib/Drupal/Core/DefaultContent/ExportResult.php	The result of exporting a content entity.
ExportStorageManager		final class	Drupal\Core\Config	core/lib/Drupal/Core/Config/ExportStorageManager.php	The export storage manager dispatches an event for the export storage.		1	2
ExportStorageManagerTest		class	Drupal\KernelTests\Core\Config	core/tests/Drupal/KernelTests/Core/Config/ExportStorageManagerTest.php	Tests the export storage manager.
ExposedFilterAJAXTest		class	Drupal\Tests\views\FunctionalJavascript	core/modules/views/tests/src/FunctionalJavascript/ExposedFilterAJAXTest.php	Tests the basic AJAX functionality of Views exposed forms.
ExposedFormCache		class	Drupal\views	core/modules/views/src/ExposedFormCache.php	Caches exposed forms, as they are heavy to generate.		1	2
ExposedFormCheckboxesTest		class	Drupal\Tests\views\Functional\Plugin	core/modules/views/tests/src/Functional/Plugin/ExposedFormCheckboxesTest.php	Tests exposed forms functionality.
ExposedFormLinkDisplayTest		class	Drupal\Tests\views\Kernel\Plugin	core/modules/views/tests/src/Kernel/Plugin/ExposedFormLinkDisplayTest.php	Tests exposed form actions for block displays with custom link targets.
ExposedFormPluginBase		abstract class	Drupal\views\Plugin\views\exposed_form	core/modules/views/src/Plugin/views/exposed_form/ExposedFormPluginBase.php	Base class for Views exposed filter form plugins.	2
ExposedFormPluginInterface		interface	Drupal\views\Plugin\views\exposed_form	core/modules/views/src/Plugin/views/exposed_form/ExposedFormPluginInterface.php	Interface for exposed filter form plugins.	1	1	1
ExposedFormRenderTest		class	Drupal\Tests\views\Kernel\Plugin	core/modules/views/tests/src/Kernel/Plugin/ExposedFormRenderTest.php	Tests the exposed form.
ExposedFormTest		class	Drupal\Tests\views\Functional\Plugin	core/modules/views/tests/src/Functional/Plugin/ExposedFormTest.php	Tests exposed forms functionality.
ExposedFormUITest		class	Drupal\Tests\views_ui\Functional	core/modules/views_ui/tests/src/Functional/ExposedFormUITest.php	Tests exposed forms UI functionality.
ExtendableInterface		interface	Drupal\Core\Database\Query	core/lib/Drupal/Core/Database/Query/ExtendableInterface.php	Interface for extendable query objects.	1	1
ExtendedDiscoveryInterface		interface	Drupal\Tests\Component\Plugin\Discovery	core/tests/Drupal/Tests/Component/Plugin/Discovery/AttributeBridgeDecoratorTest.php	An interface for testing the Discovery interface.
ExtendedForm		class	Drupal\install_form_test\Form	core/modules/system/tests/modules/install_form_test/src/Form/ExtendedForm.php	Extends the site setting form.			1
ExtendFriendsTest		class	Drupal\Tests\Core\Foo	core/tests/PHPStan/fixtures/test-methods-with-metadata.php
ExtendingNonInstalledClass		class	Drupal\plugin_test\Plugin\plugin_test\fruit	core/modules/system/tests/modules/plugin_test/src/Plugin/plugin_test/fruit/ExtendingNonInstalledClass.php	Plugin annotation @Plugin( id = "extending_non_installed_class", label = "A plugin whose class is extending from a non-installed module class", color = "pink", )
ExtendingNonInstalledClass		class	Drupal\plugin_test\Plugin\plugin_test\custom_annotation	core/modules/system/tests/modules/plugin_test/src/Plugin/plugin_test/custom_annotation/ExtendingNonInstalledClass.php	This class does not have a plugin attribute or plugin annotation on purpose.
Extension		class	Drupal\system\Plugin\migrate\source	core/modules/system/src/Plugin/migrate/source/Extension.php	Drupal 6/7 system data for a legacy extension source from database.		1
Extension		class	Drupal\Core\Extension	core/lib/Drupal/Core/Extension/Extension.php	Defines an extension (file) object.	2	53
ExtensionAvailableConstraint		class	Drupal\Core\Extension\Plugin\Validation\Constraint	core/lib/Drupal/Core/Extension/Plugin/Validation/Constraint/ExtensionAvailableConstraint.php	Check if an extension (module, theme, or profile) is available.		1
ExtensionAvailableConstraintValidator		class	Drupal\Core\Extension\Plugin\Validation\Constraint	core/lib/Drupal/Core/Extension/Plugin/Validation/Constraint/ExtensionAvailableConstraintValidator.php	Validates that a given extension exists.		1
ExtensionAvailableConstraintValidatorTest		class	Drupal\KernelTests\Core\Extension	core/tests/Drupal/KernelTests/Core/Extension/ExtensionAvailableConstraintValidatorTest.php	Tests the ExtensionAvailable constraint validator.
ExtensionDiscovery		class	Drupal\Core\Extension	core/lib/Drupal/Core/Extension/ExtensionDiscovery.php	Discovers available extensions in the filesystem.		25
ExtensionDiscoveryTest		class	Drupal\Tests\Core\Extension	core/tests/Drupal/Tests/Core/Extension/ExtensionDiscoveryTest.php	Tests discovery of extensions.
ExtensionExistsConstraint		class	Drupal\Core\Extension\Plugin\Validation\Constraint	core/lib/Drupal/Core/Extension/Plugin/Validation/Constraint/ExtensionExistsConstraint.php	Checks that the value is the name of an installed extension.		1
ExtensionExistsConstraintValidator		class	Drupal\Core\Extension\Plugin\Validation\Constraint	core/lib/Drupal/Core/Extension/Plugin/Validation/Constraint/ExtensionExistsConstraintValidator.php	Validates that a given extension exists.		1
ExtensionExistsConstraintValidatorTest		class	Drupal\KernelTests\Core\Extension	core/tests/Drupal/KernelTests/Core/Extension/ExtensionExistsConstraintValidatorTest.php	Tests the ExtensionExists constraint validator.
ExtensionInstallStorage		class	Drupal\Core\Config	core/lib/Drupal/Core/Config/ExtensionInstallStorage.php	Storage to access configuration and schema in enabled extensions.		2	2
ExtensionInstallStorageTest		class	Drupal\Tests\Core\Config	core/tests/Drupal/Tests/Core/Config/ExtensionInstallStorageTest.php	Tests Drupal\Core\Config\ExtensionInstallStorage.
ExtensionLifecycle		final class	Drupal\Core\Extension	core/lib/Drupal/Core/Extension/ExtensionLifecycle.php	Extension lifecycle.		21
ExtensionList		abstract class	Drupal\Core\Extension	core/lib/Drupal/Core/Extension/ExtensionList.php	Provides available extensions.	6	4
ExtensionListTest		class	Drupal\Tests\Core\Extension	core/tests/Drupal/Tests/Core/Extension/ExtensionListTest.php	Tests Drupal\Core\Extension\ExtensionList.
ExtensionListTestTrait		trait	Drupal\Tests	core/tests/Drupal/Tests/ExtensionListTestTrait.php	Provides extension list methods.		2
ExtensionListTrait		trait	Drupal\Core\Installer	core/lib/Drupal/Core/Installer/ExtensionListTrait.php	Provides common functionality for the extension list classes.

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