1 public function cutStr($string, $start ,$sublen, $extstring='
', $code = 'UTF-8')
2
{
3 if ($code == 'UTF-8')
4 {
5 $pa = "/[\x01-\x7f]|[\xc2-\xdf][\x80-\xbf]|\xe0[\xa0-\xbf][\x80-\xbf]|[\xe1-\xef][\x80-\xbf][\x80-\xbf]|\xf0[\x90-\xbf][\x80-\xbf]
[\x80-\xbf]|[\xf1-\xf7][\x80-\xbf][\x80-\xbf][\x80-\xbf]/";
6 preg_match_all($pa, $string, $t_string);
7 if(count($t_string[0]) - $start > $sublen)
8 return join('', array_slice($t_string[0], $start, $sublen)).$extstring;
9 return join('', array_slice($t_string[0], $start, $sublen));
10 } else {
11 $start = $start*2;
12 $sublen = $sublen*2;
13 $strlen = strlen($string);
14 $tmpstr = '';
15 for($i=0; $i<$strlen; $i++)
16 {
17 if($i>=$start && $i<($start+$sublen))
18 {
19 if(ord(substr($string, $i, 1))>129)
20 {
21 $tmpstr.= substr($string, $i, 2);
22 } else {
23 $tmpstr.= substr($string, $i, 1);
24 }
25 }
26 if(ord(substr($string, $i, 1))>129) $i++;
27 }
28 if(strlen($tmpstr)<$strlen ) $tmpstr.= $extstring;
29 return $tmpstr;
30 }
31 }