php模板提示Undefined variable '$output'

php

运行index.php 能下常输出: 1 2 3 4 5 6 7 8 9 10

虽然能运行,但是有这个提示,总觉得不太好....求解答...啊

提示:
Multiple annotations found at this line:
- Line Breakpoint: count.html.php
[line: 9 ]
- Undefined variable '$output'

以下是文件内容-----------------------------------------------index.php 内容如下:

count.html.php 内容如下: