Provides an interface for helpers that operate on files and stream wrappers. Hierarchy interface

public File::setMimeType($mime) Sets the

public FileSystem::__construct(StreamWrapperManagerInterface $stream_wrapper_manager

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

Install, update and uninstall functions for File module. File core/modules/file/file.install

public static MimeTypeGuesser::registerWithSymfonyGuesser(ContainerInterface

public File::getSize() Returns the size

public File::getMimeType() Returns the

protected FileAccessControlHandler::checkCrea

public MimeTypeGuesser::addGuesser(MimeTypeGuesserInterface