Description:
------------
setlocale (LC_CTYPE, 'tr_TR');
echo strtolower("T?RK?E KARAKTERLER ???N ??Z?M");

The output must be:

t?rk?e karakterler i?in ??z?m

But there is a problem:

t?rk?e karakterler ???n ??z?m


Is there any solution?




Reproduce code:
---------------
<?php
setlocale (LC_CTYPE, 'tr_TR');
echo strtolower("T?RK?E KARAKTERLER ???N ??Z?M");
?>

Expected result:
----------------
t?rk?e karakterler i?in ??z?m

Actual result:
--------------
t?rk?e karakterler ???n ??z?m