I\'m working on a UTF-8 Persian website with integrated mysql database. All the content in the website are imported through an admin panel and it\'s all persian.
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This is called a collation. It's what MySQL uses to compare two different characters. I'm afraid I don't know anything about persian or arabic, but the concept is the same. Essentially you've got two characters which map to the same base value. You need to find a collation which maps ي to ی. I'm afraid that's as helpful as I can be without knowing more about the language.