public function guessExtension() { $type = $this->getMimeType(); $guesser = ExtensionGuesser::getInstance(); return $guesser->guess($type); }
public function preUpload() { if (null !== $this->photo_file) { // do whatever you want to generate a unique name $this->nom = $this->getUser()->getUsername() . '.' . $this->photo_file->guessExtension(); } }