int|null getClientSize() Returns the file size. It is extracted from the request from

string|null guessExtension() Returns the extension based on the mime type. If the mime

string|null guessClientExtension() Returns the extension based on the client mime type. If

string|null getClientMimeType() Returns the file mime type. The client mime type is extracted

static int getMaxFilesize() Returns the maximum size of an uploaded file as configured

File move(string $directory, string $name