Classes, traits, and interfaces - 11.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 1531

Name Deprecated Object type Namespace File name Summary Direct uses Use statements Strings
CustomPlugin class Drupal\Tests\Component\Annotation core/tests/Drupal/Tests/Component/Annotation/AnnotatedClassDiscoveryTest.php Custom plugin annotation.
CustomPlugin class com\example\PluginNamespace core/tests/fixtures/plugins/CustomPlugin.php Custom plugin attribute.
CustomPlugin2 class Drupal\Tests\Component\Annotation core/tests/Drupal/Tests/Component/Annotation/AnnotatedClassDiscoveryTest.php Custom plugin annotation.
CustomPlugin2 class com\example\PluginNamespace core/tests/fixtures/plugins/CustomPlugin.php Custom plugin attribute.
CustomStrings class Drupal\Core\StringTranslation\Translator core/lib/Drupal/Core/StringTranslation/Translator/CustomStrings.php String translator using overrides from variables. 2
CustomThemeNegotiator class Drupal\theme_test\Theme core/modules/system/tests/modules/theme_test/src/Theme/CustomThemeNegotiator.php Just forces the 'test_theme' theme. 2
D6FileField class Drupal\migrate_field_plugin_manager_test\Plugin\migrate\field core/modules/migrate_drupal/tests/modules/migrate_field_plugin_manager_test/src/Plugin/migrate/field/D6FileField.php MigrateField Plugin for Drupal 6 file fields.
D6NoCoreVersionSpecified class Drupal\migrate_field_plugin_manager_test\Plugin\migrate\field core/modules/migrate_drupal/tests/modules/migrate_field_plugin_manager_test/src/Plugin/migrate/field/D6NoCoreVersionSpecified.php MigrateField Plugin for migrating fields without core version specification.
D6NodeDeriver class Drupal\node\Plugin\migrate core/modules/node/src/Plugin/migrate/D6NodeDeriver.php Deriver for Drupal 6 node and node revision migrations based on node types. 4
D6NodeTranslation class Drupal\node\Plugin\migrate core/modules/node/src/Plugin/migrate/D6NodeTranslation.php Migration plugin for the Drupal 6 node translations. 2
D6TermNodeDeriver class Drupal\taxonomy\Plugin\migrate core/modules/taxonomy/src/Plugin/migrate/D6TermNodeDeriver.php Deriver for Drupal 6 term node migrations based on vocabularies. 3
D7Comment class Drupal\comment\Plugin\migrate core/modules/comment/src/Plugin/migrate/D7Comment.php Migration plugin for Drupal 7 comments with fields. 2
D7NodeDeriver class Drupal\node\Plugin\migrate core/modules/node/src/Plugin/migrate/D7NodeDeriver.php Deriver for Drupal 7 node and node revision migrations based on node types. 5
D7NodeTranslation class Drupal\node\Plugin\migrate core/modules/node/src/Plugin/migrate/D7NodeTranslation.php Migration plugin for the Drupal 7 node translations. 2
D7TaxonomyTermDeriver class Drupal\taxonomy\Plugin\migrate core/modules/taxonomy/src/Plugin/migrate/D7TaxonomyTermDeriver.php Deriver for Drupal 7 taxonomy term migrations based on vocabularies. 2
DAlterHooks class Drupal\ddd_hook_order_test\Hook core/modules/system/tests/modules/HookOrder/ddd_hook_order_test/src/Hook/DAlterHooks.php This class contains hook implementations. 1
Data abstract class Drupal\jsonapi\JsonApiResource core/modules/jsonapi/src/JsonApiResource/Data.php Represents the `data` and `included` objects of a top-level object. 2 5
Database abstract class Drupal\Core\Database core/lib/Drupal/Core/Database/Database.php Primary front-controller for the database system. 246
DatabaseAccessDeniedException class Drupal\Core\Database core/lib/Drupal/Core/Database/DatabaseAccessDeniedException.php Exception thrown if access credentials fail. 3
DatabaseBackend class Drupal\Core\Flood core/lib/Drupal/Core/Flood/DatabaseBackend.php Defines the database flood backend. This is the default Drupal backend. 2 2
DatabaseBackend class Drupal\Core\Cache core/lib/Drupal/Core/Cache/DatabaseBackend.php Defines a default cache implementation. 4
DatabaseBackendFactory class Drupal\Core\Cache core/lib/Drupal/Core/Cache/DatabaseBackendFactory.php Defines a default cache backend factory. 2 2
DatabaseBackendFactoryTest class Drupal\Tests\Core\Cache core/tests/Drupal/Tests/Core/Cache/DatabaseBackendFactoryTest.php Tests Drupal\Core\Cache\DatabaseBackendFactory.
DatabaseBackendTagTest class Drupal\KernelTests\Core\Cache core/tests/Drupal/KernelTests/Core/Cache/DatabaseBackendTagTest.php Tests DatabaseBackend cache tag implementation.
DatabaseBackendTest class Drupal\KernelTests\Core\Cache core/tests/Drupal/KernelTests/Core/Cache/DatabaseBackendTest.php Unit test of the database backend using the generic cache unit test base.
DatabaseCacheTagsChecksum class Drupal\Core\Cache core/lib/Drupal/Core/Cache/DatabaseCacheTagsChecksum.php Cache tags invalidations checksum implementation that uses the database. 2
DatabaseConnectionRefusedException class Drupal\Core\Database core/lib/Drupal/Core/Database/DatabaseConnectionRefusedException.php Exception thrown if server refuses connection. 2
DatabaseDriver class Drupal\Core\Extension core/lib/Drupal/Core/Extension/DatabaseDriver.php Defines a database driver extension object.
DatabaseDriverList class Drupal\Core\Extension core/lib/Drupal/Core/Extension/DatabaseDriverList.php Provides a list of available database drivers. 4 2
DatabaseDriverListTest class Drupal\Tests\Core\Extension core/tests/Drupal/Tests/Core/Extension/DatabaseDriverListTest.php Tests DatabaseDriverList methods.
DatabaseDriverProvidedByModuleTest class Drupal\Tests\system\Functional\System core/modules/system/tests/src/Functional/System/DatabaseDriverProvidedByModuleTest.php Tests output on the status overview page.
DatabaseDriverUninstallValidator class Drupal\Core\Extension core/lib/Drupal/Core/Extension/DatabaseDriverUninstallValidator.php Ensures installed modules providing a database driver are not uninstalled. 2
DatabaseEvent abstract class Drupal\Core\Database\Event core/lib/Drupal/Core/Database/Event/DatabaseEvent.php Represents a database event. 2 4
DatabaseEventEnabler class Drupal\performance_test core/modules/system/tests/modules/performance_test/src/DatabaseEventEnabler.php Enables database event logging for the main request.
DatabaseEventsTest class Drupal\Tests\Core\Database core/tests/Drupal/Tests/Core/Database/DatabaseEventsTest.php Tests Drupal\Core\Database\Connection.
DatabaseEventSubscriber class Drupal\database_test\EventSubscriber core/modules/system/tests/modules/database_test/src/EventSubscriber/DatabaseEventSubscriber.php Responds to database API events. 1
DatabaseEventTest class Drupal\KernelTests\Core\Database core/tests/Drupal/KernelTests/Core/Database/DatabaseEventTest.php Tests the database API events.
DatabaseException interface Drupal\Core\Database core/lib/Drupal/Core/Database/DatabaseException.php Interface for a database exception. 24 25
DatabaseExceptionWrapper class Drupal\Core\Database core/lib/Drupal/Core/Database/DatabaseExceptionWrapper.php This wrapper class serves only to provide additional debug information. 1 31
DatabaseExceptionWrapperTest class Drupal\KernelTests\Core\Database core/tests/Drupal/KernelTests/Core/Database/DatabaseExceptionWrapperTest.php Tests exceptions thrown by queries.
DatabaseExceptionWrapperTest class Drupal\Tests\pgsql\Kernel\pgsql core/modules/pgsql/tests/src/Kernel/pgsql/DatabaseExceptionWrapperTest.php Tests exceptions thrown by queries.
DatabaseExceptionWrapperTest class Drupal\Tests\mysqli\Kernel\mysqli core/modules/mysqli/tests/src/Kernel/mysqli/DatabaseExceptionWrapperTest.php Tests exceptions thrown by queries.
DatabaseExceptionWrapperTest class Drupal\Tests\sqlite\Kernel\sqlite core/modules/sqlite/tests/src/Kernel/sqlite/DatabaseExceptionWrapperTest.php Tests exceptions thrown by queries.
DatabaseExceptionWrapperTest class Drupal\Tests\mysql\Kernel\mysql core/modules/mysql/tests/src/Kernel/mysql/DatabaseExceptionWrapperTest.php Tests exceptions thrown by queries. 1 1
DatabaseFileUsageBackend class Drupal\file\FileUsage core/modules/file/src/FileUsage/DatabaseFileUsageBackend.php Defines the database file usage backend. This is the default Drupal backend. 2
DatabaseLockBackend class Drupal\Core\ProxyClass\Lock core/lib/Drupal/Core/ProxyClass/Lock/DatabaseLockBackend.php Provides a proxy class for \Drupal\Core\Lock\DatabaseLockBackend.
DatabaseLockBackend class Drupal\Core\Lock core/lib/Drupal/Core/Lock/DatabaseLockBackend.php Defines the database lock backend. This is the default backend in Drupal. 1 2 2
DatabaseNotFoundException class Drupal\Core\Database core/lib/Drupal/Core/Database/DatabaseNotFoundException.php Exception thrown if specified database is not found. 10
DatabaseQueue class Drupal\Core\Queue core/lib/Drupal/Core/Queue/DatabaseQueue.php Default queue implementation. 1 3
DatabaseStorage class Drupal\Core\Config core/lib/Drupal/Core/Config/DatabaseStorage.php Defines the Database storage. 3 3

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