$row = $stmt->fetch(PDO::FETCH_ASSOC);
//data that will be executed in `dvd_id`
$this->sku = $row['sku'];
$this->name = $row['name'];
$this->img = $row['img'];
$this->description = $row['description'];
$this->price = $row['price'];
$this->capacity = $row['capacity'];
$stmt->setFetchMode(PDO::FETCH_INTO, $this);
$stmt->fetch();