มีสองคำถามครับเกี่ยวกับการลบไฟล์และการดาวโหลดไฟล์ครับผม งงมากครับ

<tr>
			<td><b>NAME<b></td>
			<td><b>Filename</b></td>
			<td><b>URI</b></td>
			<td><b>Date</b></td>
			<td><b>Delete</b></td>
			</tr>
			<?php foreach ($rs2 as $row ):
			$uri_xml = JURI::root()."media/k2/xml_rss/".$row['file_name'];
			//$savePath = JPATH_ROOT.DS.'media'.DS.'k2'.DS.'xml_rss'.$row['file_name'];
			?>
			<tr>
			<td><?php echo $row['name'] ?></td>
//// ตรงนี้ครับอยากให้มีลิ้งแล้วเอาไฟลออกมา
			<td><?php echo $row['file_name'] ?></td>
			<td><a href="<?php echo $uri_xml ?>" target="new"><?php echo $row['file_name'] ?></a></td>
			<td><b><?php echo ($row['file_date']); ?></b></td>
			<td><a href="index.php?option=com_k2exporter&task=del_xml&del_id=<?php echo $row['id'];?>">Remove</a></td>
			<input type="hidden" name="option" value="com_k2exporter" />
            <input type="hidden" name="task" value="del_xml" />
			</tr>
			<?php endforeach;?>
			</table>	

	function del_xml() {
	
		$id = JRequest::getInt('del_id');
		//$savepath = JPATH_ROOT.DS.'media'.DS.'k2'.DS.'xml_import';
		//echo $id;
		//exit;
		
	    $db3 = JFactory::getDBO();
		$strSQL3 = "DELETE FROM tb_attach_xml ";
		$strSQL3 .= "WHERE tb_attach_xml.id = '".$_GET["del_id"]."' ";
		$db3->setQuery($strSQL3);
		$rs3 = $db3->loadObjectList();
		//print_r($row);
		//exit;
		
		$file = JPATH_ROOT.DS.'media'.DS.'k2'.DS.'xml_rss'.DS.$rs3->file_name;
	
		$del_file = @unlink($file);
		//echo $del_file;
		//exit;
					
		$msg = JText::_('File Export DELETE');
		$link = 'index.php?option=com_k2exporter';
		$redirect = JFactory::getApplication();
		$redirect->redirect($link,$msg);
	
	}