PHP
class ducvupro
{
 
/* Cắt Từ Trong Chuỗi */
 
public static function cattu($str, $len)
{
if (mb_strlen($str, 'UTF-8') > $len*5) {
$str = mb_substr($str, 0, $len*5, 'UTF-8');
$str = mb_substr($str, 0, mb_strrpos($str," ", 'UTF-8'), 'UTF-8');
$str = strip_tags(implode(' ',array_slice(explode(' ',$str),0,$len)));
}
return $str;
}
 
 
/* Cắt Kí Tự Trong Chuỗi */
 
public static function catkitu($str, $len)
{
$str = mb_substr($str, 0, $len, 'UTF-8');
return $str;
}
}