fetch——row

<?php
class DBDA
{
public $hostname="localhost";
public $username="root";
public $mima="123";
public $dbname="zhousan";
public function Query($str,$t=0)
        {
            $obj=new MySQLi($this->hostname,$this->username,$this->mima,$this->dbname);
            $fanhui=$obj->query($str);
            if($t==0)
            {
                return $fanhui;
            }
            else
            {
                while($m=$fanhui->fetch_row())
                {
                    $attr[]=$m;
                }
                return json_encode($attr);    

            }

        }    

}

?>

DBDB.class.php