求教：PHP如何将一个无限分类转换为一个易做图数组？

如何输出类似如下易做图数组：

Array
(
    [0] => Array
        (
            [id] => 1
            [name] => 新闻
            [parent] => Array
                (
                  [0] => Array
                   (
                      [id] => 2
                      [name] => PHP新闻
                      [parent] => Array
                        (
                          [0] => Array
                           (
                            [id] => 3
                            [name] => PHP6.0出来了
                           )
                        )
                    )
                   [1] => Array
                    (
                      [id] => 6
                      [name] => mysql新闻
                      [parent] => Array
                        (
                          [0] => Array
                          (
                            [id] => 7
                            [name] => 暂无mysql新闻
                          )
                        )
                   )
                )
        )
    [1] => Array
        (           
        )
 
)

答案：while($rs = mysql_fetch_array($result)){
 $rows[] = array('id'=>$rs['Id'],'name'=>$rs['Title'],'parentid'=>$rs['Pid']);
}  
    
 function findChild(&$arr,$id){        
     $childs=array();  
      foreach ($arr as $k => $v){  
          if($v['parentid']== $id){  
               $childs[]=$v;               
          }              
     }          
     return $childs;                 
 }  
 function build_tree($root_id){  
     global $rows;  
     $childs=findChild($rows,$root_id);  
     if(empty($childs)){  
         return null;  
     }  
    foreach ($childs as $k => $v){  
        $rescurTree=build_tree($v['id']);  
        if( null !=   $rescurTree){   
        $childs[$k]['childs']=$rescurTree;  
        }  
    }  
     return $childs;  
 }    
 $tree=build_tree(0);  
 print_r($tree);      
 ?>
SDDDDDDDDDDDDDDDDDDDDDDDD

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