Turkish Capitalize (Title case) for string

titleCaseTurkish

function titleCaseTurkish($string)
{
    $temp = preg_split("/\s/u", $string, -1, PREG_SPLIT_NO_EMPTY);
    foreach ($temp as &$item) {
        $item = str_replace("i", "İ", $item);
    }
    $temp = join(' ', $temp);

    return mb_convert_case($temp, MB_CASE_TITLE, "UTF-8");
}