string getClientOriginalExtension() Returns the original file extension. It is extracted

interface ExtensionGuesserInterface Guesses the file extension corresponding to a given mime type

string|null getClientOriginalName() Returns the original file name. It is extracted from

string guess(string $path) Guesses the mime type of the file with the given path.

class MimeTypeExtensionGuesser implements

class UploadedFile extends File

bool isValid() Returns whether the file was uploaded successfully.

int getError() Returns the upload error. If the upload was successful, the constant UPLOADERROK

class File extends SplFileInfo

string getErrorMessage() Returns an informative upload error message.