fwrite() and UTF8

Question

I am creating a file using php fwrite() and I know all my data is in UTF8 ( I have done extensive testing on this - when saving data to db and outputting on normal webpage a

Answer 1

If you know the data is in UTF8 than you want to set up the header.

I wrote a solution answering to another tread.

The solution is the following: As the UTF-8 byte-order mark is \xef\xbb\xbf we should add it to the document's header.

<?php
function writeStringToFile($file, $string){
    $f=fopen($file, "wb");
    $file="\xEF\xBB\xBF".$file; // this is what makes the magic
    fputs($f, $string);
    fclose($f);
}
?>

You can adapt it to your code, basically you just want to make sure that you write a UTF8 file (as you said you know your content is UTF8 encoded).

Answer 2

I know all my data is in UTF8 - wrong.
Encoding it's not the format of a file. So, check charset in headers of the page, where you taking data from:
header("Content-type: text/html; charset=utf-8;");
And check if data really in multi-byte encoding:
if (strlen($data)==mb_strlen($data, 'UTF-8')) print 'not UTF-8';
else print 'utf-8';