utf-8 intercepting strings in php supports utf-8

Intercept string
$string="I turned one year older in April 2006!";
echo substr($string,1)."...";
//Intercept string
function SubstrGB($in,$num)
{
$pos=0;
$out="";
while($pos {
$c=substr($in,$pos, 1);
if($c=="n") break;
if(ord($c)>128)
{
$out.=$c;
$pos++;
$c=substr($in ,$pos,1);
$out.=$c;
}
else
{
$out.=$c;
}
$pos++;
if($pos>=$num) break;
}
return $out;
}
echo SubstrGB($string,8);
?>
/***************************************************** *************************
* * cut_string.php
* * ------------------ ----------
* Date : Jul 16, 2005
* Copyright : none
* Mail :
*
* Function: Intercept Chinese characters.
*
*
********** *************************************************** *****************/
function cut_str($string, $sublen, $start = 0, $ code = 'UTF-8')
{
if($code == 'UTF-8')
{
$pa = "/[x01-x7f]|[xc2-xdf][x80-xbf]|xe0[ xa0-xbf][x80-xbf]|[xe1-xef][x80-xbf][x80-xbf]|xf0[x90-xbf][x80-xbf][x80-xbf]|[xf1-xf7][x80 -xbf][x80-xbf][x80-xbf]/";
preg_match_all($pa, $string, $t_string);
if(count($t_string[0]) - $start > $sublen) return join ('', array_slice($t_string[0], $start, $sublen))."...";
                              return join('',  array_slice($t_string[0],  $start,  $sublen));
}
else
{
$start = $start*2;
$sublen = $sublen*2;
$strlen = strlen($string);
$tmpstr = '';
for($i=0; $i< ;$strlen; $i++)
                                                                                                                                     )>129 ) $tmpstr.= substr($string, $i, 2);
                                                    $tmpstr. )>129) $i++;
                                                          ;br>" .cut_str($string,8,$start=0,$code='sdf') ;
?>

The above introduces the support for UTF-8 in intercepting strings in UTF-8 PHP, including the content of UTF-8. I hope it will be helpful to friends who are interested in PHP tutorials.