České řazení / Czech sorting
<?
setlocale(LC_ALL, 'cs_CZ.UTF-8');
header("content-type: text/html; charset=UTF-8");
$arr = explode(",", "č, d, b, a, š, ř, o, x, z, ž, á, s, m");
uasort($arr, "strcoll");
echo "<pre>" . print_r($arr, 1) . "</pre>";
?>