php 中英文混合字符串的截取函数

3. /**

4. * 截取中英文混合的字符串
5. * by bbs.it-home.org
6. */
7. function mb_str_split($string){
8. # Split at all position not after the start: ^
9. # and not before the end: $
10. //$string = iconv('gb2312', 'utf-8//ignore', $string);
11. return preg_split('/(?}

12. $string = 'q345e q345d q345c，q345d圆钢,q345e圆钢nm360a耐磨板,欧标s355低合金板 bs700mc汽车板,汽车qste460tm结构钢,船板ah36/eh36/dh36,美标容器板 耐候钢 弹簧钢';

13. //$charlist = mb_str_split($string);
14. echo mb_chunk_split($string, 30, '..', true);
15. echo '
    ';
16. echo mb_chunk_split($string, 10, '
    ');
18. function mb_chunk_split($string, $length, $end = '..', $once = false){
19. //$string = iconv('gb2312', 'utf-8//ignore', $string);
20. $charlist = mb_str_split($string);
21. $i = 0;
22. $j = 0;
23. $once_array = array();
24. foreach($charlist as $value){
25. /* if($once){
26. if(($i + $j) > $length){
27. $i--; //尽可能少的
28. break;
29. }
30. }else{
31. if(($i + $j) >= $length){
32. $once_array[] = implode('', array_slice($charlist, $once_leng, $i));
33. $once_leng += $i;
34. $i = $j = 0;
35. }
36. } */
38. if(($i + $j) >= $length){
39. if($once)
40. return implode('', array_slice($charlist, 0, $i-1)) . (count($charlist) $once_array[] = $i;
41. $i = $j = 0;
42. }
45. if(ord($value) > 127)
46. $j++; //中文算2个宽度
47. /*if($value == ',')
48. $j--;*/
49. $i++;
50. }
51. //末尾补齐
52. if(array_sum($once_array) $once_array[] = $i;
54. $str_arr = array();
55. $once_leng = 0;
56. foreach($once_array as $value){
57. $str_arr[] = implode('', array_slice($charlist, $once_leng, $value));
58. $once_leng += $value;
59. }
61. return implode($end, $str_arr);
62. //return implode('', array_slice($charlist, 0, $i)) . (count($charlist) }
63. ?>

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