Facebook charset detection mechanism?

Posted by Void on Stack Overflow See other posts from Stack Overflow or by Void
Published on 2010-01-06T12:11:02Z Indexed on 2010/06/18 4:33 UTC
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php

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html

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forms

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facebook

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charset

Today, I have looked into HTML code of facebook.com, and found something like this:

<input type="hidden" value="€,´,€,´,?,?,?" name="charset_test"/>

It's repeated two times inside the <form>...</form>.

Any idea what this code might be useful for - some kind of server-side client charset detection? As far as I know, browser charset is being transmitted in HTTP request anyway (an "Accept-Charset" header).

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