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php实现的无极分类(递归)的代码

时间:2021-07-01 10:21:17 帮助过:14人阅读

  1. $conn=mysql_connect("localhost","root","myoa888");

  2. mysql_select_db("lost63",$conn) or die("select db error");
  3. $sql[]="Create TABLE `lost63`.`dd_book_class` (
  4. `id` INT NOT NULL AUTO_INCREMENT PRIMARY KEY ,
  5. `classname` VARCHAR( 50 ) NOT NULL ,
  6. `classid` INT NOT NULL
  7. )";
  8. $sql[]="insert `dd_book_class` (classname,classid) values ('小说',0)";
  9. $sql[]="insert `dd_book_class` (classname,classid) values ('文艺',0)";
  10. $sql[]="insert `dd_book_class` (classname,classid) values ('青春',0)";
  11. $sql[]="insert `dd_book_class` (classname,classid) values ('励志/成功',0)";
  12. $sql[]="insert `dd_book_class` (classname,classid) values ('少儿',0)";
  13. $sql[]="insert `dd_book_class` (classname,classid) values ('悬疑',1)";
  14. $sql[]="insert `dd_book_class` (classname,classid) values ('言情',1)";
  15. $sql[]="insert `dd_book_class` (classname,classid) values ('职场',1)";
  16. $sql[]="insert `dd_book_class` (classname,classid) values ('文学',2)";
  17. $sql[]="insert `dd_book_class` (classname,classid) values ('科普',5)";
  18. //print_r($sql);
  19. /* -- insert test data -- */
  20. foreach($sql as $value){
  21. mysql_query($value) or die("insert data error");
  22. }

  23. $class_arr=array();

  24. $recordset=mysql_query("select * from `dd_book_class`");
  25. while($row=mysql_fetch_array($recordset)){
  26. $class_arr[]=array($row['id'],$row['classname'],$row['classid']);
  27. }
  28. function classtree($n,$id){
  29. global $class_arr;
  30. $n = str_pad('',$n,'-',STR_PAD_RIGHT);
  31. $n = str_replace("-"," ",$n);
  32. for($i=0;$iif($class_arr[$i][2]==$id){
  33. echo $n.'┠'.$class_arr[$i]
  34. [1].'
    ';
  35. classtree($n+1,$class_arr[$i][0]);
  36. }
  37. }
  38. }
  39. classtree(0,0);
  40. ?>

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