Persian language support in PHP/MySQL web application

I'm building a PHP/MySQL web application and I need to have persian language support besides english, french and german. Can you guys give me some advice regarding this topic开发者_如何转开发? What encoding should I use in order to match all three languages?

Thank you.

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Looking at a Persian Website should give you some clues. utf-8 seems to be fine (and certainly will be for German/French), but you'll need to set the text direction to rtl (right-to-left) for Persian.