public function GetData($table, $whereHead = "", $whereMain = "", $ordeby = "ORDER BY Id ASC", $limit="")
    {
        try 
        {
            $sql = "SELECT * FROM ".$table;
            if(!empty($whereHead) && !empty($whereMain))
            {
                $sql.=" ".$whereHead;
                if(!empty($ordeby)){ $sql.=" ".$ordeby; }
                if(!empty($limit)){ $sql.=" LIMIT ".$limit; }
                $run=$this->connection->prepare($sql);
                $return=$run->execute($whereMain);
                $data=$run->fetchAll(PDO::FETCH_ASSOC);
            }
            else
            {
                if(!empty($ordeby)){ $sql.=" ".$ordeby; }
                if(!empty($limit)){ $sql.=" LIMIT ".$limit; }
                $data=$this->connection->query($sql, PDO::FETCH_ASSOC);
            }
            if($data!=false && !empty($data))
            {
                $datas = array();
                foreach ($data as $info) 
                {
                    $datas[] = $info;
                }
                return $datas;
            }
            else{
                return false;
            }
        } 
        catch (PDOException $e) 
        {
            echo $e->getMessage();
            exit();
        }
    }

 $data=$VT->GetData("categories","where Id=?",array($Id));