类写错了，如何只读一组数据

	






class PicInfo

{ 

	       // $sql= "select * from userinfo where username='$name' "; //书写sql 

	public function PicInfo($sql)

	{

            require_once("db_config.php"); //包含配置信息. 

	        $result= mysql_query($sql, $conn); // 执行查询语句

	        $this->picInfo = mysql_fetch_array($result); //返回查询结果到数组

		    $num_rows = mysql_num_rows($result);

			mysql_query("set names UTF8");

	        mysql_close($conn); //关闭数据库连接 

	        $this->getInfo($num_rows); //调用传递信息的方法.

	    } 

	    // 获取信息传递给属性的方法

	

	    private function getInfo($num_rows){ 

	        $this->pid = $this->picInfo["PID"]; 

	        $this->b_img = $this->picInfo["B_img"];	

	        $this->m_img = $this->picInfo["M_img"];

			$this->s_img = $this->picInfo["S_img"];

			$this->indicate = $this->picInfo["Indicate"];

			$this->type = $this->picInfo["type"];

		   	$this->row = $this->picInfo['row']=$num_rows;

	    } 

	      

	    //返回每个属性的public 方法. 

		   public function getRow(){ 

		

	        return $this->row; 

	    } 

	    public function getPid(){ 

		

	        return $this->pid; 

	    } 

	      

	    public function getB_img(){ 

	        return $this->b_img; 

	    } 

	       

	    public function getM_img(){ 

	        return$this->m_img; 

	    } 

		  public function getS_img(){ 

	        return$this->s_img; 

	    } 

		  public function getIndicate(){ 

	        return$this->indicate; 

	    } 

		  public function getType(){ 

	        return$this->type; 

	    } 

	

	}

	

	class edit_img

	{

	public function edit_img($sql)

	{

          require_once("db_config.php"); //包含配置信息. 



	        $result= mysql_query($sql,$conn); // 执行查询语句

	     	$row=mysql_affected_rows(); //返回查询结果到数组

			if($row<=0)

			{

				echo "";

				}

				else{

					echo "有".$row."组数据受到影响";