原理简单,学过数据结构的一看就明白是什么道理了,不过今天在使用时数据中出现了子节点id(71)小于父节点id(104).导致部分子节点没被存储入数组,修改了一下,实例代码如下:
- <?php
- class tree
- {
- var $data = array();
- var $child = array(-1=>array());
- var $layer = array(-1=>-1);
- var $parent = array();
- var $num = array();
- function setnode($id, $parent, $value,$num=0)
- {
- $parent = $parent ? $parent : 0;
- $this->data[$id] = $value;
- $this->num[$id] = $num;
- if (!isset($this->child[$id])) $this->child[$id] = array();
- $this->child[$parent][] = $id;
- $this->parent[$id] = $parent;
- if (!isset($this->layer[$parent]) && $parent == 0)
- {
- $this->layer[$id] = 0;
- }
- else
- {
- $this->layer[$id] = $this->layer[$parent] + 1;
- }
- }
- function getlist(&$tree, $root= 0)
- {
- foreach ($this->child[$root] as $key=>$id)
- {
- $tree[] = $id;
- if($this->child[$id]) $this->getlist($tree, $id);
- }
- }
- function getvalue($id)
- {
- if($this->layer[$id]==0)
- {
- return $this->data[$id];
- }
- else
- {
- return $leftmar.$this->data[$id];
- }
- }
- function getnum($id)
- {
- return $this->num[$id];
- }
- function getbitvalue($id)
- {
- return $this->data[$id];
- }
- function getlayer($id, $space = false)
- {
- return $space ? str_repeat($space, $this->layer[$id]) : $this->layer[$id];
- }
- function getparent($id)
- {
- return $this->parent[$id];
- }
- function getparents($id)
- {
- while ($this->parent[$id] != -1)
- {
- $id = $parent[$this->layer[$id]] = $this->parent[$id];
- }
- ksort($parent);
- reset($parent);
- return $parent;
- }
- function getchild($id)
- {
- return $this->child[$id];
- }
- function getchilds($id = 0)
- {
- $child = array($id);
- $this->getlist($child, $id);
- return $child;
- }
- function printdata()
- {
- return $this->layer;
- }
- }
- ?>
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