class DataConnection
{
    private $host = 'localhost';
    private $user = 'genny';
    private $pass = 'genny';
    private $dbname = 'progetto';

    private $dbh;
    private $error;

    public function __construct()
    {
        // Set DSN
        $dsn = 'mysql:host=' . $this->host . ';dbname=' . $this->dbname;
        // Set options
        $options = array(
            PDO::ATTR_PERSISTENT => true,
            PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION
        );
        // Create a new PDO instanace
        try {
            $this->dbh = new PDO($dsn, $this->user, $this->pass, $options);
        } // Catch any errors
        catch (PDOException $e) {
            $this->error = $e->getMessage();
        }
    }

}