A small function to determine whether there is a string containing Chinese characters

/*
can be used in user names and other places where Chinese characters are not allowed
*/
//--Example
$str = “dd*(*d ”;
if (iscn($str)) {
echo “String including Chinese”;
} else {
echo “String excluding Chinese”;
}
/ /--Function
function iscn($str){
if (preg_match("/.*[".chr(0xa1)."-".chr(0xff)."]+.*/", $str)) {
return true;
} else {
return false;
}
}
?>