$queryRis = mysql_query("SELECT * FROM login WHERE user='$username' and pass='$password'") or exit("Problemi in query");
        $riga = mysql_fetch_array($queryRis);

        if (!$riga) {
            header("location: login.php");
            $_SESSION['connesso']=false;
        };
        if ($riga) {
            echo "Accesso effettuato";
            $_SESSION['connesso']=true;?>
            <?php
            header('Location: index.php');
            echo "cafafaofn!";
            exit;
        };