php树型类实例

<?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;
??? }
}
?>