encoding problem on file_get_contents

Question

i'm using a script for getting a url's content then it calculates keyword destiny etc.

but my problem is that, there is problem about turkish characters like "ı","ş"

i tried iconv for converting utf-8 to iso-8859-9 but it didn't work.

you can see the code on http://www.gazihanisildak.com/keyword/code.txt

thx in advance.