初学者，json输出

菜鸟求助，json输出
本帖最后由 mxh861001 于 2014-05-19 21:12:45 编辑

foreach ($query->result_array() as $row)
   {
	$data = array(
		'id' =>  $row['id'],
		'title' =>$row['title']
	);
   }

echo json_encode($data);

前端为何只输了一组数据？
CI框架
({"id":"2","title":"\u65b0\u7586VS\u5317\u4eac"})
------解决方案--------------------
foreach ($query->result_array() as $row)
{
$data[] = array(
'id' => $row['id'],
'title' =>$row['title']
);
}