自动生成文章摘要的php代码

3. // PHP 4.3 or above needed

4. define("BRIEF_LENGTH", 800); //Word amount of the Briefing of an Article
5. function Generate_Brief($text){
6. global $Briefing_Length;
7. if(strlen($text) $Foremost = substr($text, 0, BRIEF_LENGTH);
8. $re = "/]*(>?)/i";
9. $Single = "/BASE|META|LINK|HR|BR|PARAM|IMG|AREA|INPUT/i";
10. $Stack = array(); $posStack = array();
11. preg_match_all($re,$Foremost,$matches, PREG_SET_ORDER | PREG_OFFSET_CAPTURE);
12. /* [Child-matching Specification]:
13. $matches[$i][1] : A "/" charactor indicating whether current "<...>" Friction is Closing Part
14. $matches[$i][2] : Element Name.
15. $matches[$i][3] : Right > of a "<...>" Friction */
16. for($i = 0 ; $i if($matches[$i][1][0] == ""){
17. $Elem = $matches[$i][2][0];
18. if(preg_match($Single,$Elem) && $matches[$i][3][0] !=""){
19. continue;
20. }
21. array_push($Stack, strtoupper($matches[$i][2][0]));
22. array_push($posStack, $matches[$i][2][1]);
23. if($matches[$i][3][0] =="") break;
24. }else{
25. $StackTop = $Stack[count($Stack)-1];
26. $End = strtoupper($matches[$i][2][0]);
27. if(strcasecmp($StackTop,$End)==0){
28. array_pop($Stack);
29. array_pop($posStack);
30. if($matches[$i][3][0] ==""){
31. $Foremost = $Foremost.">";
32. }
33. }
34. }
35. }
36. $cutpos = array_shift($posStack) - 1;
37. $Foremost = substr($Foremost,0,$cutpos);
38. return $Foremost;
39. };
40. 若遇到函数对多字节字符集支持得不好的情况，大家可以参考下下面这个代码。

41. 代码2：

42. function Generate_Brief($text){
43. global $Briefing_Length;
44. mb_regex_encoding("UTF-8");
45. if(mb_strlen($text) $Foremost = mb_substr($text, 0, BRIEF_LENGTH);
46. $re = "]*(>?)";
47. $Single = "/BASE|META|LINK|HR|BR|PARAM|IMG|AREA|INPUT|BR/i";
48. $Stack = array(); $posStack = array();
49. mb_ereg_search_init($Foremost, $re, 'i');
50. while($pos = mb_ereg_search_pos()){
51. $match = mb_ereg_search_getregs();
52. /* [Child-matching Formulation]:
53. $matche[1] : A "/" charactor indicating whether current "<...>" Friction is Closing Part
54. $matche[2] : Element Name.
55. $matche[3] : Right > of a "<...>" Friction
56. */
57. if($match[1]==""){
58. $Elem = $match[2];
59. if(mb_eregi($Single, $Elem) && $match[3] !=""){
60. continue;
61. }
62. array_push($Stack, mb_strtoupper($Elem));
63. array_push($posStack, $pos[0]);
64. }else{
65. $StackTop = $Stack[count($Stack)-1];
66. $End = mb_strtoupper($match[2]);
67. if(strcasecmp($StackTop,$End)==0){
68. array_pop($Stack);
69. array_pop($posStack);
70. if($match[3] ==""){
71. $Foremost = $Foremost.">";
72. }
73. }
74. }
75. }
76. $cutpos = array_shift($posStack) - 1;
77. $Foremost = mb_substr($Foremost,0,$cutpos,"UTF-8");
78. return $Foremost;
79. };
80. ?>

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至此，自动生成文章摘要的php代码的两种方法都介绍完了，希望对您有所帮助。 编辑推荐： php 摘要生成函数(自定义,无乱码)