public function __construct()
{
$this->userId = $_SESSION['user_id'];
$this->viewModel = new ViewModel();
$this->commonViewData();
$this->dbAdapter = new DB_Adapter(DB_Controller::call(), $this->userId);
}
public static function call()
{
if (self::$db_instance == null) {
self::$db_instance = new mysqli(HOST, USERNAME, PWD, DBNAME);
if (self::$db_instance->connect_errno) {
echo "Failed to connect to MySQL: (" . self::$db_instance->connect_errno . ") " . self::$db_instance->db_instance->connect_error;
}
}
return self::$db_instance;
}