// get id upload
	public function getid(){
		$db = new mysqli("localhost","root","", "rubrica");
        if ($db-> connect_errno) {
		exit();
		}
    $nome = $this->unome;
    $cognome = $this->ucognome;
    $email = $this->uemail;
    $telefono = $this->utel;
    $query = $db->query("SELECT id FROM users WHERE nome='$nome' and cognome='$cognome' and email='$email' and telefono='$telefono'");
	$id = $query->fetch_assoc()['id'];
	$db->close();
	return $id;
	}