chinese
function to_upper($string) {
 $new_string = "";
 $i = 0;
 while($i < strlen($string)) {
 if (ord(substr($string,$i,1)) <128)
 {
 $new_string .= strtoupper(substr($string,$i,1));
 $i++;
 } else {
 $new_string .= substr($string,$i,2);
 $i=$i+2;
 }
 }
 return $new_string;
}