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
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core/
core.api.php, line 1529
| Name | Deprecated | Object type | Namespace | File name | Summary | Direct uses | Use statements | Strings |
|---|---|---|---|---|---|---|---|---|
| PluralVariants | class | Drupal\config_translation\FormElement | core/ |
Defines form elements for plurals in configuration translation. | ||||
| PoDatabaseReader | class | Drupal\locale | core/ |
Gettext PO reader working with the locale module database. | 1 | |||
| PoDatabaseWriter | class | Drupal\locale | core/ |
Gettext PO writer working with the locale module database. | ||||
| PoHeader | class | Drupal\Component\Gettext | core/ |
Gettext PO header handler. | 5 | |||
| PoHeaderTest | class | Drupal\Tests\Component\Gettext | core/ |
Unit tests for the Gettext PO file header handling features. | ||||
| PoItem | class | Drupal\Component\Gettext | core/ |
PoItem handles one translation. | 17 | |||
| PoItemTest | class | Drupal\Tests\Component\Gettext | core/ |
Tests Drupal\Component\Gettext\PoItem. | ||||
| PoMemoryWriter | class | Drupal\Component\Gettext | core/ |
Defines a Gettext PO memory writer, to be used by the installer. | 1 | |||
| PoMetadataInterface | interface | Drupal\Component\Gettext | core/ |
Methods required for both reader and writer implementations. | 2 | |||
| PoReaderInterface | interface | Drupal\Component\Gettext | core/ |
Shared interface definition for all Gettext PO Readers. | 2 | 2 | ||
| PositionShimTestController | class | Drupal\position_shim_test\Controller | core/ |
The position shim test controller. | ||||
| PositionShimTestPortedJqueryTestsController | class | Drupal\position_shim_test\Controller | core/ |
Controller for the testing jQuery UI position shim. | ||||
| PostApplyEvent | final class | Drupal\package_manager\Event | core/ |
Event fired after staged changes are synced to the active directory. | 10 | |||
| PostApplySubscriber | class | Drupal\updated_module | core/ |
Writes a file after staged changes are applied to the active directory. | 2 | |||
| PostCreateEvent | final class | Drupal\package_manager\Event | core/ |
Event fired after a stage directory has been created. | 8 | |||
| PostgresqlDateSql | class | Drupal\views\Plugin\views\query | core/ |
PostgreSQL-specific date handling. | 1 | 2 | ||
| PostgresqlDateSqlTest | class | Drupal\Tests\views\Unit\Plugin\views\query | core/ |
Tests the PostgreSQL-specific date query handler. | ||||
| PostPackageEventListenerInterface | interface | Drupal\Composer\Plugin\Scaffold | composer/ |
Interface for post package event listeners. | 1 | |||
| PoStreamInterface | interface | Drupal\Component\Gettext | core/ |
Common functions for file/stream based PO readers/writers. | 2 | |||
| PoStreamReader | class | Drupal\Component\Gettext | core/ |
Implements Gettext PO stream reader. | 2 | |||
| PoStreamWriter | class | Drupal\Component\Gettext | core/ |
Defines a Gettext PO stream writer. | 2 | |||
| PoStreamWriterTest | class | Drupal\Tests\Component\Gettext | core/ |
Tests Drupal\Component\Gettext\PoStreamWriter. | ||||
| PostRequireEvent | final class | Drupal\package_manager\Event | core/ |
Event fired after packages are updated to the stage directory. | 8 | |||
| PoWriterInterface | interface | Drupal\Component\Gettext | core/ |
Shared interface definition for all Gettext PO Writers. | 3 | 1 | ||
| PreApplyEvent | final class | Drupal\package_manager\Event | core/ |
Event fired before staged changes are synced to the active directory. | 42 | |||
| PrecedingConstraintAwareValidatorTrait | trait | Drupal\ckeditor5\Plugin\Validation\Constraint | core/ |
A constraint may need preceding constraints to not have been violated. | ||||
| PreconfiguredFieldUiOptionsInterface | interface | Drupal\Core\Field | core/ |
Defines an interface for exposing "preconfigured" field definitions. | 2 | 2 | ||
| PreCreateEvent | final class | Drupal\package_manager\Event | core/ |
Event fired before a stage directory is created. | 37 | |||
| PredefinedStatesWorkflowTestType | class | Drupal\workflow_type_test\Plugin\WorkflowType | core/ |
Test workflow type. | ||||
| PredefinedWorkflowTypeTest | class | Drupal\Tests\workflows\Kernel | core/ |
Test a predefined workflow based on something other than configuration. | ||||
| PreEntityImportEvent | final class | Drupal\Core\DefaultContent | core/ |
Event dispatched before an entity is created during default content import. | 1 | |||
| PreExistingConfigException | class | Drupal\Core\Config | core/ |
An exception thrown if configuration with the same name already exists. | 7 | |||
| PreExportEvent | final class | Drupal\Core\DefaultContent | core/ |
Event dispatched before an entity is exported as default content. | 7 | |||
| PrefetchedResult | class | Drupal\Core\Database\Statement | core/ |
Class for prefetched results of a data query language (DQL) statement. | 1 | |||
| PrefixFloodInterface | interface | Drupal\Core\Flood | core/ |
Defines an interface for flood controllers that clear by identifier prefix. | 2 | 1 | ||
| PrefixInfoTest | class | Drupal\Tests\mysqli\Kernel\mysqli | core/ |
Tests that the prefix info for a database schema is correct. | ||||
| PrefixInfoTest | class | Drupal\Tests\mysql\Kernel\mysql | core/ |
Tests that the prefix info for a database schema is correct. | 1 | 1 | ||
| PreImportEvent | final class | Drupal\Core\DefaultContent | core/ |
Event dispatched before default content is imported. | 1 | |||
| PreloadableRouteProviderInterface | interface | Drupal\Core\Routing | core/ |
Extends the router provider interface to pre-load routes. | 3 | 3 | ||
| PrepareCallbackTestForm | class | Drupal\Tests\Core\Form | core/ |
A test form used for the prepareCallback() tests. | ||||
| PrepareLayout | class | Drupal\layout_builder\EventSubscriber | core/ |
An event subscriber to prepare section storage. | 2 | |||
| PrepareLayoutEvent | class | Drupal\layout_builder\Event | core/ |
Event fired in #pre_render of \Drupal\layout_builder\Element\LayoutBuilder. | 3 | |||
| PrepareModulesEntityUninstallForm | class | Drupal\system\Form | core/ |
Provides a form removing module content entities data before uninstallation. | 1 | |||
| PrepareModulesEntityUninstallFormTest | class | Drupal\Tests\system\Kernel\Module | core/ |
Tests PrepareModulesEntityUninstallForm. | ||||
| PrepareUninstallTest | class | Drupal\Tests\system\Functional\Module | core/ |
Tests that modules which provide entity types can be uninstalled. | ||||
| PrependCommand | class | Drupal\Core\Ajax | core/ |
AJAX command for calling the jQuery insert() method. | 6 | |||
| PreprocessHooks | final class | Drupal\admin\Hook | core/ |
Provides preprocess implementations. | ||||
| PreprocessHooks | final class | Drupal\default_admin\Hook | core/ |
Provides preprocess implementations. | ||||
| PreprocessPagerTest | class | Drupal\Tests\system\Unit\Pager | core/ |
Tests pager preprocessing. | ||||
| PrerenderList | abstract class | Drupal\views\Plugin\views\field | core/ |
Field handler to provide a list of items. | 3 | 3 |
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