Description:
------------
I read BUG #22778, but thit problem did'n slove. so that, i decided report my problem.
I create a php or html file by notepad, and save them as utf-8.
in a other php file, sample as test.php , In this file, I use function include or require to include utf-8 file.
When i use a browser (IE) to open file test.php, i alway see in my code a spacial charactor as spuare when i view source. But i browser, sometime i see a spacial charactor as  and when i refresh that page, it'll be hidden.
This error is not big problem, but i think, if that charactor don't display, is better.

Sorry if My English not good.

Reproduce code:
---------------
This file is included (file1.php)
<?php
	$biến = "Không biết có được không?";
	echo $biến;	
?>

This file is include file above (file2.php)
<?php
	require_once("test.php");
?>


Expected result:
----------------
source HTML
{a spacial charactor display here, but i can copy it}Chào mọi người, Chúng ta bắt.Không biết có được không?