大神们，php新手，请教个问题，

Question

已知数组Array
(
    [0] => Array
        (
            [id] => 9
            [cid] => 1
            [parentid] => 0
            [label] => 首页
            [target] => 
            [href] =>
            [icon] => 
            [status] => 1
            [listorder] => 0
            [path] => 0-9
        )    [1] => Array
        (
            [id] => 4
            [cid] => 1
            [parentid] => 0
            [label] => 产品服务
            [target] => 
            [href] => 
            [icon] => 
            [status] => 1
            [listorder] => 0
            [path] => 0-4
        )    [2] => Array
        (
            [id] => 5
            [cid] => 1
            [parentid] => 0
            [label] => 解决方案
            [target] => 
            [href] => 
            [icon] => 
            [status] => 1
            [listorder] => 0
            [path] => 0-5
        )    [3] => Array
        (
            [id] => 6
            [cid] => 1
            [parentid] => 0
            [label] => 客户案例
            [target] => 
            [href] => 
            [icon] => 
            [status] => 1
            [listorder] => 0
            [path] => 0-6
        )    [4] => Array
        (
            [id] => 7
            [cid] => 1
            [parentid] => 0
            [label] => 关于我们
            [target] => 
            [href] => 
            [icon] => 
            [status] => 1
            [listorder] => 0
            [path] => 0-7
        )    [5] => Array
        (
            [id] => 8
            [cid] => 1
            [parentid] => 4
            [label] => 产品服务
            [target] => 
            [href] => home
            [icon] => 
            [status] => 1
            [listorder] => 0
            [path] => 0-4-8
        ))
怎么把parentid和键相同的取出放到键为parentid的里面就是说最后面那个产品服务是上面那个产品服务的子菜单
怎么遍历输出的时候在它下面而不是一下输出六个

Answer 1

http://bbs.csdn.net/topics/370094009

Answer 2

foreach($array as $key=>$i){
    if($i['parentid'] == $key){
        //你的代码
    }
}

Answer 3

看版主的回复，相当精辟。使用find_child()就可以达到你的目标