file_load_multiple(array $fids = NULL, $reset = FALSE) Loads file entities from the database.

public FileSystem::dirname($uri) Gets

protected FileAccessControlHandler::getFileRe

public File::url($rel = 'canonical', $options = array())

hook_file_validate(Drupal\file\FileInterface $file) Check that files meet a given criteria.

The file logger channel. Type: \Psr\Log\LoggerInterface File

template_preprocess_file_link(&$variables) Prepares variables for file link templates.

public File::isTemporary() Returns TRUE

public FileSystemInterface::mkdir($uri, $mode = NULL, $recursive

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