file_field_find_file_reference_column(FieldDefinitionInterface $field) Determine whether a field references

Defines the base class for database file usage backend. Hierarchy class \Drupal\file\FileUsage\

Defines the file entity class. Plugin annotation @ContentEntityType(

file_icon_map($mime_type) Determines the generic icon MIME package based on a file's MIME type.

file_managed_file_save_upload($element, FormStateInterface $form_state) Saves any files that have been uploaded

hook_file_copy(Drupal\file\FileInterface $file, Drupal\file\FileInterface $source) Respond to a file that has

file_get_content_headers(FileInterface $file) Examines a file entity and returns appropriate content headers

public FileSystemInterface::realpath($uri)

file_field_views_data(FieldStorageConfigInterface $field_storage) Implements

EditorImageDialog::buildForm in