PHP递归生成树状行实例代码_PHP教程

2. header("content-type: text/html; charset=utf-8");
3. $connect = mysql_connect(localhost, root, 123456);
4. mysql_select_db("wz");
5. mysql_query("set names utf8");
6. //获得顶节点
7. $sql = "select id, name,ischild from tree where parent = 0 order by id asc";
8. $result = mysql_query($sql);
9. while($row = mysql_fetch_array($result))
10. {
11. extract($row);
12. //如果有子节点，就在前面加个事件，以便展开或者关闭子节点
13. $icon = $ischild ? " ":"-";
14. $name = $icon . $name;
15. echo "" . $name;
16. if($ischild)
17. {
18. //递归获取节点
19. getNode($id, 0);
20. }
21. echo "";
22. }
24. function getNode($id, $level)
25. {
26. $sql = "select id, name, ischild from tree where parent = $id order by id asc ";
27. $result = mysql_query($sql);
28. $level ;
29. while($row = mysql_fetch_array($result))
30. {
31. extract($row);
32. $icon = $ischild ? " ":"-";
33. $name = $icon . $name;
34. echo "" . echoChar(" ", $level) . $name;
35. if($ischild)
36. {
37. getNode($id, $level);
38. }
39. echo "";
40. }
41. }
43. function echoChar($char, $num)
44. {
45. for($i=0;$i< $num; $i )
46. {
47. $strChar .= $char;
48. }
49. return $strChar;
50. }
51. ?>

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