比较PHP中的两个阿拉伯语字符串值？

I'm having problems trying to compare two Arabic-language strings in a PHP script to see if they match. I've tried setting the internal encoding to UTF-8 with mb_internal_encoding, I've tried a simple if ($x == $y) expression, I've tried strcmp()... no dice. Any idea what I'm doing wrong? Does PHP have problems with doing string comparisons with non-English text?

Thanks!

Here is a code excerpt:

             // Chop up HTML content into bits

             $threadPieces = explode('</div>', $innerHTML);

             // Chop up the HTML bits into data entries

             $strippedThreadPieces = strip_tags($threadPieces[1]); 
             $threadInfo = explode('-', $strippedThreadPieces);

             $threadTitleExists = trim($threadTitleExists, 'thread_title_');

             $postername = "مراسل";

             if (($threadTitleExists > 100000) && ($threadInfo[0] === $postername))
             {
             echo 'Thread title:';
             echo strip_tags($threadPieces[0]);
             echo '<p>';
             }
             else
             {

             }

I think the problem is the character set of your php file, try to save it using utf-8 character set.

The way I did this was using the function mb_ereg which is regular expression match with multibyte support.