public MimeTypeGuesser::guess($path)

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

Default MIME extension mapping. Array of mimetypes correlated to the extensions that relate to them. Type:

template_preprocess_file_managed_file(&$variables) Prepares variables for file form widget templates.

public File::isTemporary() Returns TRUE

template_preprocess_file_widget_multiple(&$variables) Prepares variables for multi file form widget templates

public File::setMimeType($mime) Sets the

file_token_info() Implements

public FileSystem::__construct(StreamWrapperManagerInterface $stream_wrapper_manager

public FileInterface::setMimeType($mime) Sets