php 循环结果集 生手

Class MySQLDB
{
		var $host;
		var $user;
		var $passwd;
		var $database;
		var $conn;

		//利用构造函数实现变量初始化
		//同时连接数据库操作
		function MySQLDB($host,$user,$password,$database)
		{
			$this->host = $host;
			$this->user = $user;
			$this->passwd = $password;
			$this->database = $database;
			$this->conn=mysql_connect($this->host, $this->user,$this->passwd) or die("Could not connect to $this->host");
			mysql_select_db($this->database,$this->conn) or die("Could not switch to database $this->database");
			mysql_query("set names 'gbk'");
		}

		//该函数用来关闭数据库连接
		function Close()
		{
		    MySQL_close($this->conn);
		}

		//该函数实现数据库查询操作
		function Query($queryStr)
		{
		   $res =Mysql_query($queryStr, $this->conn);
		   return $res;
		}

		//该函数返回记录集
		function getRows($res)
		{
			$rowno = 0;
			$rowno = MySQL_num_rows($res);
			if($rowno>0)
			{
			for($row=0;$row<$rowno;$row++ )
				 {

					$rows[$row]=MySQL_fetch_array($res);

					//本来为MySQL_fetch_row,但是不能以数组的方式来提取,只能用索引

					//这样可以用索引和名称，更为方便

				 }

				 return $rows;

			  }

			}

			//该函数取回数据库记录数
			function getRowsNum($res)
			{
			   $rowno = 0;
			   $rowno = mysql_num_rows($res);
			   return $rowno;
			}

			//该函数返回数据库表字段数
			function getFieldsNum($res)
			{
				$fieldno = 0;
				$fieldno = mysql_num_fields($res);
				return $fieldno;

			}

			//该函数返回数据库表字段名称集
			function getFields($res)
			{
			   $fno = $this->getFieldsNum($res);
			   if($fno>0)
			   {
					 for($i=0;$i<$fno;$i++ )
					 {
						$fs[$i]=MySQL_field_name($res,$i);//取第i个字段的名称
					 }
					 return $fs;

			   }

			}

} 

    session_start();
	include('../config/config_db.php');
	include('../class/db/class_db.php');