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<?php
class Tree
{
      //  public $data=array();//ËùÓнڵãÖµ
       // public $cateArray=array();//ËùÓи¸½Úµã
        function Tree()
        {
        }
        //setNode(Ŀ¼ID,Éϼ¶ID£¬Ä¿Â¼Ãû×Ö);
        function setNode ($id, $parent, $value){
        $parent = $parent?$parent:0;
        $this->data[$id] = $value;//»ñÈ¡µ±Ç°ID¶ÔÓ¦µÄµ±Ç°Ä¿Â¼Ãû
        $this->cateArray[$id] = $parent;//»ñÈ¡µ±Ç°ID¶ÔÓ¦µÄ¸¸·ÖÀàID
       //echo $id."->".$this->cateArray[$id]."--".$this->data[$id]."<br>";
        }
     function getChilds($id=0)
     {
            $childArray=array();
            $childs=$this->getChild($id);
            foreach ($childs as $child)
            {
                     $childArray[]=$child;
                     $childArray=array_merge($childArray,$this->getChilds($child));//id µÝ¹é ÀÛ¼Ó
            }
            return $childArray;
     }
     function getChild($id)
     {
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