PHP Chinese string interception PHP function to intercept Chinese string

/**
 @Chinese string interception function
 @http://bbs.it-home.org
*/
function cnSubStr($string,$sublen)
{
if($sublen>=strlen($string))
{
return $string;
}
$s="";
for($i=0;$i<$sublen;$i++)
{
if(ord($string{$i})>127)
{
$s.=$string{$i}.$string{++$i};
continue;
}else{
$s.=$string{$i};
continue;
}
}
return $s;
}// End Function cnSubStr($string,$sublen)
/////////// Use like this :
echo "__________________________";
$string="382脚本学堂8923专业网站技术站点89023";
$sublen=strlen($string);
$len=20;
echo $string."";
echo "总长为：".($sublen+1)."";
echo "截取数：".$len."";
for($i=1;$i<=$sublen+1;$i++){
if($i>$len){
echo $i." → ".cnSubStr($string,$i)."…";
continue;
}
echo $i." → ".cnSubStr($string,$i)."";
}
?>