A function in PHP that supports cutting Chinese characters

Supports cutting Chinese characters, half Chinese characters such as ? will not appear

//Chinese character cutting can prevent half Chinese characters from appearing
function substr_cut($title,$length=8)
{
 if (strlen($title)>$length) {
 $temp = 0;
 for($i=0; $i<$length; $i++)
 if (ord($title[$i]) >128) $temp++;
 if ($temp%2 == 0)
 $title = substr($title,0,$length)."..";
 else
 $title = substr($title,0,$length+1)."..";
 }
 return $title;
}