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Title	Object type	File name	Summary
FilesystemLoader::$allowedFileExtensions	property	core/lib/Drupal/Core/Template/Loader/FilesystemLoader.php	Allowed file extensions.
FileUploadHandler::DEFAULT_EXTENSIONS	constant	core/modules/file/src/Upload/FileUploadHandler.php	The default extensions if none are provided.
FileUploadResourceTestBase::testFileUploadNoExtensionSetting	function	core/modules/rest/tests/src/Functional/FileUploadResourceTestBase.php	Tests using the file upload POST route no extension configured.
FileUploadSanitizeNameEvent::$allowedExtensions	property	core/lib/Drupal/Core/File/Event/FileUploadSanitizeNameEvent.php	A list of allowed extensions.
FileUploadSanitizeNameEvent::getAllowedExtensions	function	core/lib/Drupal/Core/File/Event/FileUploadSanitizeNameEvent.php	Gets the list of allowed extensions.
FileUploadSanitizeNameEventTest::testAllowedExtensions	function	core/tests/Drupal/Tests/Core/File/FileUploadSanitizeNameEventTest.php	@covers ::getAllowedExtensions
GDToolkit::getSupportedExtensions	function	core/modules/system/src/Plugin/ImageToolkit/GDToolkit.php	Returns a list of image file extensions supported by the toolkit.
ImageFactory::getSupportedExtensions	function	core/lib/Drupal/Core/Image/ImageFactory.php	Returns the image file extensions supported by the toolkit.
ImageToolkitInterface::getSupportedExtensions	function	core/lib/Drupal/Core/ImageToolkit/ImageToolkitInterface.php	Returns a list of image file extensions supported by the toolkit.
ImageToolkitManager::getAllValidExtensions	function	core/lib/Drupal/Core/ImageToolkit/ImageToolkitManager.php	Returns all valid extensions.
KernelTestBase::getExtensionsForModules	function	core/tests/Drupal/KernelTests/KernelTestBase.php	Returns Extension objects for $modules to install.
LegacyValidateTest::testInsecureExtensions	function	core/modules/file/tests/src/Kernel/LegacyValidateTest.php	Tests hard-coded security check in file_validate().
LegacyValidatorTest::providerTestFileValidateExtensionsOnUri	function	core/modules/file/tests/src/Kernel/LegacyValidatorTest.php	Data provider for ::testFileValidateExtensionsOnUri.
LegacyValidatorTest::testFileValidateExtensions	function	core/modules/file/tests/src/Kernel/LegacyValidatorTest.php	Tests the file_validate_extensions() function.
LegacyValidatorTest::testFileValidateExtensionsOnUri	function	core/modules/file/tests/src/Kernel/LegacyValidatorTest.php	Tests the file_validate_extensions() function.
LibraryDiscoveryParserTest::testBuildByExtensionSimple	function	core/tests/Drupal/Tests/Core/Asset/LibraryDiscoveryParserTest.php	Tests that basic functionality works for getLibraryByName.
ModuleExtensionList::doScanExtensions	function	core/lib/Drupal/Core/Extension/ModuleExtensionList.php	Scans the available extensions.
MultipleFileUploadTest::testMultipleFileFieldWithAllFileExtensions	function	core/modules/file/tests/src/Functional/MultipleFileUploadTest.php	Tests multiple file field with all file extensions.
PhpExtensionsValidator	class	core/modules/package_manager/src/Validator/PhpExtensionsValidator.php	Performs validation if certain PHP extensions are enabled.
PhpExtensionsValidator.php	file	core/modules/package_manager/src/Validator/PhpExtensionsValidator.php
PhpExtensionsValidator::getSubscribedEvents	function	core/modules/package_manager/src/Validator/PhpExtensionsValidator.php
PhpExtensionsValidator::insideTest	function	core/modules/package_manager/src/Validator/PhpExtensionsValidator.php	Whether this validator is running inside a test.
PhpExtensionsValidator::isExtensionLoaded	function	core/modules/package_manager/src/Validator/PhpExtensionsValidator.php	Indicates if a particular PHP extension is loaded.
PhpExtensionsValidator::validateOpenSsl	function	core/modules/package_manager/src/Validator/PhpExtensionsValidator.php	Flags an error if the OpenSSL extension is not installed.
PhpExtensionsValidator::validateXdebug	function	core/modules/package_manager/src/Validator/PhpExtensionsValidator.php	Flags a warning if Xdebug is enabled.
PhpExtensionsValidatorTest	class	core/modules/package_manager/tests/src/Kernel/PhpExtensionsValidatorTest.php	@covers \Drupal\package_manager\Validator\PhpExtensionsValidator @group package_manager @internal
PhpExtensionsValidatorTest.php	file	core/modules/package_manager/tests/src/Kernel/PhpExtensionsValidatorTest.php
PhpExtensionsValidatorTest::providerPhpExtensionsValidation	function	core/modules/package_manager/tests/src/Kernel/PhpExtensionsValidatorTest.php	Data provider for ::testPhpExtensionsValidation().
PhpExtensionsValidatorTest::testPhpExtensionsValidation	function	core/modules/package_manager/tests/src/Kernel/PhpExtensionsValidatorTest.php	Tests that PHP extensions' status are checked by Package Manager.
RecipeConfigurator::listAllExtensions	function	core/lib/Drupal/Core/Recipe/RecipeConfigurator.php	List all the extensions installed by this recipe and its dependencies.
RecipeMissingExtensionsException	class	core/lib/Drupal/Core/Recipe/RecipeMissingExtensionsException.php	Exception thrown when recipes contain or depend on missing extensions.
RecipeMissingExtensionsException.php	file	core/lib/Drupal/Core/Recipe/RecipeMissingExtensionsException.php
RecipeMissingExtensionsException::__construct	function	core/lib/Drupal/Core/Recipe/RecipeMissingExtensionsException.php	Constructs a RecipeMissingExtensionsException.
StagedDatabaseUpdateValidator::setExtensionsWithUpdates	function	core/modules/package_manager/tests/modules/package_manager_test_validation/src/StagedDatabaseUpdateValidator.php	Sets the names of the extensions which should have staged database updates.
StagedDBUpdateValidator::getExtensionsWithDatabaseUpdates	function	core/modules/package_manager/src/Validator/StagedDBUpdateValidator.php	Gets extensions that have database updates in the stage directory.
Tasks::checkExtensions	function	core/modules/pgsql/src/Driver/Database/pgsql/Install/Tasks.php	Generic function to check postgresql extensions.
TestDiscovery::$availableExtensions	property	core/lib/Drupal/Core/Test/TestDiscovery.php	Cached list of all available extension names, keyed by extension type.
TestDiscovery::getExtensions	function	core/lib/Drupal/Core/Test/TestDiscovery.php	Returns all available extensions.
TestExtension::$installedExtensions	property	core/tests/Drupal/Tests/Core/Extension/ExtensionListTest.php
TestExtension::setInstalledExtensions	function	core/tests/Drupal/Tests/Core/Extension/ExtensionListTest.php
TestToolkit::getSupportedExtensions	function	core/modules/system/tests/modules/image_test/src/Plugin/ImageToolkit/TestToolkit.php	Returns a list of image file extensions supported by the toolkit.
ThemeInitialization::$extensions	property	core/lib/Drupal/Core/Theme/ThemeInitialization.php	The extensions that might be attaching assets.
ThemeInitialization::getExtensions	function	core/lib/Drupal/Core/Theme/ThemeInitialization.php	Gets all extensions.
ToolkitGdTest::testSupportedExtensions	function	core/tests/Drupal/KernelTests/Core/Image/ToolkitGdTest.php	@covers ::getSupportedExtensions @covers ::extensionToImageType
UpdateRegistry::$enabledExtensions	property	core/lib/Drupal/Core/Update/UpdateRegistry.php
UpdateRegistry::scanExtensionsAndLoadUpdateFiles	function	core/lib/Drupal/Core/Update/UpdateRegistry.php	Scans all module, theme, and profile extensions and load the update files.
UpdateRegistryTest::setupBasicExtensions	function	core/tests/Drupal/Tests/Core/Update/UpdateRegistryTest.php	Sets up some extensions with some update functions.
UpdateScriptTest::assertInstalledExtensionsConfig	function	core/modules/system/tests/src/Functional/UpdateSystem/UpdateScriptTest.php	Asserts that an installed extension's config setting is correct.
UpdateScriptTest::enableExtensions	function	core/modules/system/tests/src/Functional/UpdateSystem/UpdateScriptTest.php	Enables an extension using the UI.
UpdateScriptTest::enableMissingExtensions	function	core/modules/system/tests/src/Functional/UpdateSystem/UpdateScriptTest.php	Enables extensions the UI.

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