function __construct($sHost, $sDbName, $sUsername, $sPassword)
{
$this->sHost = $sHost;
$this->sDbName = $sDbName;
$this->sUsername = $sUsername;
$this->sPassword = $sPassword;
$this->oDb = new \PDO('mysql:host=' . $this->sHost . ';dbname=' . $this->sDbName, $this->sUsername, $this->sPassword);
$this->oDb->setAttribute(\PDO::ATTR_ERRMODE, \PDO::ERRMODE_EXCEPTION);
}