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PHP自动生成关键字内链的类

程序员文章站 2022-05-24 12:03:37
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  1. /**

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

  7. private static $spotUrlMap;
  8. /**
  9. * Generate view spots keywords link
  10. *
  11. * @param string $description
  12. * @param array $spotUrlMap
  13. * @return string
  14. */
  15. public static function genSpotLink($basePath, $description)
  16. {
  17. if(empty(InnerLink::$spotUrlMap)){
  18. InnerLink::$spotUrlMap = DBViewSpot::getSpotPare();
  19. }
  20. // 排除不规则数据
  21. if ( empty($description)) {
  22. return $description;
  23. }
  24. foreach (InnerLink::$spotUrlMap AS $spotUrlPair){
  25. $replace = "".$spotUrlPair[0]."";
  26. // 描述里面只有文字,没有图片,所以只要注意 a 链接
  27. $tmp1 = explode(" $is_replaced=false;
  28. foreach ($tmp1 as $key=>$item){
  29. $tmp2 = explode("
  30. ",$item);
  31. if (sizeof($tmp2)>1) {
  32. if (substr($tmp2[0],0,1)!="a" && substr($tmp2[0],0,1)!="A"){
  33. if ($is_replaced===false) {
  34. $tmp2[1] = InnerLink::str_replace_once($spotUrlPair[0],$replace,$tmp2[1],$is_replaced);
  35. }
  36. $tmp1[$key] = implode("",$tmp2);
  37. }
  38. }else {
  39. if (is_string($item) && $is_replaced===false) {
  40. $tmp1[$key] = InnerLink::str_replace_once($spotUrlPair[0],$replace,$item,$is_replaced);
  41. }
  42. }
  43. }
  44. $description = implode(" }
  45. return $description;
  46. }
  47. /**
  48. * replace key word for one time
  49. *
  50. * @param string $needle
  51. * @param string $replace
  52. * @param string $haystack
  53. * @param bool $is_replaced
  54. * @return string
  55. */
  56. private static function str_replace_once($needle, $replace, $haystack,&$is_replaced) {
  57. $pos = strpos($haystack, $needle);
  58. if ($pos === false) {
  59. return $haystack;
  60. }
  61. $is_replaced=true;
  62. return substr_replace($haystack, $replace, $pos, strlen($needle));
  63. }
  64. }
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