dbconnect = new MySQLi($this->host,$this->uid,$this->pwd,$dbname);        //判断是否出错        if(!mysqli_connect_error())        {            //如果连接成功,执行SQL语句            $result = $this->dbconnect->query($sql);                        //根据语句类型判断            if($type==1)            {                //如果是查询语句,返回二维数组                return $result->fetch_all();            }            else            {                //如果是其他语句，返回true或false                return $result;            }        }        else        {            return "连接失败！";        }    }    /*ajax text 返回类型*/    public function StrQuery($sql,$type=2,$dbname="yhmgc")    {        //造连接对象        $this->dbconnect= new MYSQLi($this->host,$this->uid,$this->pwd,$dbname);        if (!mysqli_connect_error())        {            //如果连接成功，执行sql语句            $result = $this->dbconnect->query($sql);            //根据语句判断            if($type==2){            $attr = $result->fetch_all();            $str = "";            //如果是查询语句返回字符串            for($i=0;$i
      
       dbconnect= new MYSQLi($this->host,$this->uid,$this->pwd,$dbname);        if (!mysqli_connect_error())        {            //如果连接成功，执行sql语句            $result = $this->dbconnect->query($sql);            //根据语句判断            if($type==2)            {                        $attr=$result->fetch_assoc();                return json_encode($attr);                        }            else            {                    //如果是其他语句,返回true或false            if($result){                return "OK";            }else{                return "NO";            }            }        }        else        {                 return "连接失败";        }    }}