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

class MimeTypeExtensionGuesser implements

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 UploadedFile extends File

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

File move(string $directory, string $name

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

string getErrorMessage() Returns an informative upload error message.

string guess(string $path) Tries to guess the mime type of the given file. The file is