German characters not showing properly on csv file using php -

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i trying generate csv file, gets created except german characters ä,ë,ï,etc information $data variable , tried use:

utf8_encode($data);

but weird text, here headers file:

header("content-type: application/octet-stream");         header("content-disposition: attachment; filename=\"file1.csv\"");

i have tried using iconv(); no luck far.

edit

just noticed $data utf-8 removed utf8_encode(); still, when try print ?

and changed header to:

 header("content-type: text/plain; charset=utf-8");

use:

header("content-type: text/plain; charset=utf-8");

and make sure $data isn't utf-8!


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