file_cron() Implements
file_icon_class($mime_type) Gets a class for the icon for a MIME type. Parameters
file_get_content_headers(FileInterface $file) Examines a file entity and returns appropriate content headers
file_validate(FileInterface $file, $validators = array()) Checks that a file meets the criteria specified by
file_managed_file_save_upload($element, FormStateInterface $form_state) Saves any files that have been uploaded
file_progress_implementation() Determines the preferred upload progress implementation.
file_icon_map($mime_type) Determines the generic icon MIME package based on a file's MIME type.
file_theme() Implements
file_move(FileInterface $source, $destination = NULL, $replace = FILE_EXISTS_RENAME) Moves a file to a new
file_validate_name_length(FileInterface $file) Checks for files with names longer than can be stored in the
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