Description:
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I store "define() dictionary" in .php in native UTF8 encoding
(first 4 bytes represent UTF8 encoding - PHP dont recognize them)

When I use include/include_once/require/require_once

There is a E_WARNING that output already started

I think PHP should be smarter :)

Reproduce code:
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// fr.php is in native utf-8
require_once("fr.php");

Actual result:
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Warning: Cannot modify header information - headers already sent by (output started at d:\wwwroot\hotel4you\html\admin\lang\fr.php:1) in d:\wwwroot\hotel4you\html\admin\index.php on line 61