PHP subistr 截取字符串无码

更新时间：20120102

2. /**
3. * [WebodMin] (C)2010-2099 Blank Inc.
4. * This is NOT a freeware, use is subject to license terms
5. *
6. **/
8. function subistr($string, $length, $dot = ' ...') {
9. global $charset;
10. if(strlen($string) return $string;
11. }
12. $s = '';
13. if(strtolower($charset) == 'utf-8') {
14. $n = $tn = $noc = 0;
15. while($n $t = ord($string[$n]);
16. if($t == 9 || $t == 10 || (32 $tn = 1; $n++; $noc++;
17. } elseif(194 $tn = 2; $n += 2; $noc += 2;
18. } elseif(224 $tn = 3; $n += 3; $noc += 2;
19. } elseif(240 $tn = 4; $n += 4; $noc += 2;
20. } elseif(248 $tn = 5; $n += 5; $noc += 2;
21. } elseif($t == 252 || $t == 253) {
22. $tn = 6; $n += 6; $noc += 2;
23. } else {
24. $n++;
25. }
26. if($noc >= $length) {
27. break;
28. }
29. }
30. if($noc > $length) {
31. $n -= $tn;
32. }
33. $s = substr($string, 0, $n);
34. } else {
35. for($i = 0; $i $s .= ord($string[$i]) >= 127 ? $string[$i].$string[++$i] : $string[$i];
36. }
37. }
38. return $s.$dot;
39. }

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