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

public FileSystem::rmdir($uri, $context = NULL) Removes

public File::getOwner() Returns the entity

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

public File::setPermanent() Sets the file

file_field_find_file_reference_column(FieldDefinitionInterface $field) Determine whether a field references

file_icon_class($mime_type) Gets a class for the icon for a MIME type. Parameters

Provides helpers to operate on files and stream wrappers. Hierarchy class \Drupal\Core\File\

public ManagedFile::getInfo() Returns

Defines the file schema handler. Hierarchy class \Drupal\Core\Entity\Sql\