PHP自动生成关键字内链的类

3. /**

4. * php自动生成关键字的内链
5. * by bbs.it-home.org
6. */
7. include_once(dirname(__file__)."/../db/DBViewSpot.php" );

8. class InnerLink{

9. private static $spotUrlMap;
10. /**
11. * Generate view spots keywords link
12. *
13. * @param string $description
14. * @param array $spotUrlMap
15. * @return string
16. */
17. public static function genSpotLink($basePath, $description)
18. {
19. if(empty(InnerLink::$spotUrlMap)){
20. InnerLink::$spotUrlMap = DBViewSpot::getSpotPare();
21. }
22. // 排除不规则数据
23. if ( empty($description)) {
24. return $description;
25. }
26. foreach (InnerLink::$spotUrlMap AS $spotUrlPair){
27. $replace = "".$spotUrlPair[0]."";
28. // 描述里面只有文字，没有图片，所以只要注意 a 链接
29. $tmp1 = explode(" $is_replaced=false;
30. foreach ($tmp1 as $key=>$item){
31. $tmp2 = explode("
",$item);
32. if (sizeof($tmp2)>1) {
33. if (substr($tmp2[0],0,1)!="a" && substr($tmp2[0],0,1)!="A"){
34. if ($is_replaced===false) {
35. $tmp2[1] = InnerLink::str_replace_once($spotUrlPair[0],$replace,$tmp2[1],$is_replaced);
36. }
37. $tmp1[$key] = implode("",$tmp2);
38. }
39. }else {
40. if (is_string($item) && $is_replaced===false) {
41. $tmp1[$key] = InnerLink::str_replace_once($spotUrlPair[0],$replace,$item,$is_replaced);
42. }
43. }
44. }
45. $description = implode(" }
46. return $description;
47. }
48. /**
49. * replace key word for one time
50. *
51. * @param string $needle
52. * @param string $replace
53. * @param string $haystack
54. * @param bool $is_replaced
55. * @return string
56. */
57. private static function str_replace_once($needle, $replace, $haystack,&$is_replaced) {
58. $pos = strpos($haystack, $needle);
59. if ($pos === false) {
60. return $haystack;
61. }
62. $is_replaced=true;
63. return substr_replace($haystack, $replace, $pos, strlen($needle));
64. }
65. }

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