file_managed_file_submit($form, FormStateInterface $form_state) Form submission handler for upload / remove

public DatabaseFileUsageBackend::li

public ExtensionMimeTypeGuesser::setMapping(array

public FileInterface::setTemporary() Sets

public FileSystem::unlink($uri, $context = NULL) Deletes

public File::getMimeType() Returns the

Defines an interface for file entity storage classes. Hierarchy interface \Drupal\Core\Entity\

file_validate_is_image(FileInterface $file) Checks that the file is recognized as a valid image.

Defines a MIME type guesser that also supports stream wrapper paths. Hierarchy class

public File::getFilename() Returns the