请教一个多维数组递归查找问题

有个无限极分类的数据表
我把数据表分类，生成了多维数组进行保存
function getkind($id)
{
if(file_exists($_G['cache'].'kindcache.txt')) //分类缓存是否存在
$str = unserialize(file_get_contents($_G['cache'].'kindcache.txt'));
else
$str = $cache->outkindcache(0); // 生成分类缓存
$data=$this->getkindcache($id,$str); //查找数组
return $data;
}

function getkindcache($id,$str,$data1=array())//递归函数
{
global $_G;
foreach($str as $k=>$v)
{
if($v['kind'] == $id)
{
$data1[] = $v;
}
if(is_array($v['child']))
$this->getkindcache($id,$v['child'],$data1);

}
return $data1;
}
上面的这个递归函数总是返回NULL,不能保存我要返回的数据

标红的是我要查找的数据

Array
(
[0] => Array
(
[uid] => 2
[kind] => 0
[top] => 2
[pagesize] => 15
[name] => 新闻
[sort] => 1
[keywords] =>
[description] =>
[enable] => 1
[html] => 1
[outlink] =>
[model] => news
[modelname] => 新闻模型
[template] => news.html
[templist] => news_list.html
[tempview] => news_view.html
[typedir] => http://localhost/2011-4-30/static/2
[grade] => 1
[kindtype] => 1
[child] => Array
(
[0] => Array
(
[uid] => 1
[kind] => 2
[top] => 1
[pagesize] => 15
[name] => 产品展示
[sort] => 0
[keywords] =>
[description] =>
[enable] => 1
[html] => 1
[outlink] =>
[model] => product
[modelname] => 产品模型
[template] => product.html
[templist] => product_list.html
[tempview] => product_view.html
[typedir] => http://localhost/2011-4-30/static/1
[grade] => 1
[kindtype] => 1
[child] => Array
(
[0] => Array
(
[uid] => 15
[kind] => 1
[top] => 1
[pagesize] => 15
[name] => 橡胶制品
[sort] => 0
[keywords] =>
[description] =>
[enable] => 1
[html] => 1
[outlink] =>
[model] => product
[modelname] => 产品模型
[template] => product.html
[templist] => product_list.html
[tempview] => product_view.html
[typedir] => http://localhost/2011-4-30/static/1/15/list_1.html
[grade] => 1
[kindtype] => 0
[child] =>
)
)

)

[1] => Array
(
[uid] => 3
[kind] => 2
[top] => 3
[pagesize] => 30
[name] => 图片展示
[sort] => 0
[keywords] =>
[description] =>
[enable] => 1
[html] => 1
[outlink] =>
[model] => images
[modelname] => 图片模型
[template] => images.html
[templist] => images_list.html
[tempview] => images_view.html
[typedir] => http://localhost/2011-4-30/static/3/list_1.html
[grade] => 1
[kindtype] => 0
[child] => Array
(
[0] => Array
(
[uid] => 17
[kind] => 3
[top] => 3
[pagesize] => 15
[name] => 测试
[sort] => 0
[keywords] => 1111
[description] => 2222
[enable] => 1
[html] => 1
[outlink] =>
[model] => news
[modelname] => 新闻模型
[template] => news.html
[templist] => news_list.html
[tempview] => news_view.html
[typedir] => http://localhost/2011-4-30/static/3/17/list_1.html
[grade] => 0
[kindtype] => 0
[child] =>
)

[1] => Array
(
[uid] => 18
[kind] => 3
[top] => 3
[pagesize] => 15
[name] => 测试
[sort] => 0
[keywords] =>
[description] =>
[enable] => 1
[html] => 1
[outlink] =>
[model] => news
[modelname] => 新闻模型
[template] => news.html
[templist] => news_list.html
[tempview] => news_view.html
[typedir] => http://localhost/2011-4-30/static/3/18/list_1.html
[grade] => 0
[kindtype] => 0
[child] =>
)

[2] => Array
(
[uid] => 19
[kind] => 3
[top] => 3
[pagesize] => 15
[name] => 测试
[sort] => 0
[keywords] =>
[description] =>
[enable] => 1
[html] => 1
[outlink] =>
[model] => news
[modelname] => 新闻模型
[template] => news.html
[templist] => news_list.html
[tempview] => news_view.html
[typedir] => http://localhost/2011-4-30/static/3/19/list_1.html
[grade] => 0
[kindtype] => 0
[child] =>
）
)

)

回复讨论(解决方案)

[3] => Array
(
[uid] => 7
[kind] => 2
[top] => 2
[pagesize] => 15
[name] => 法国新闻
[sort] => 0
[keywords] =>
[description] =>
[enable] => 1
[html] => 1
[outlink] =>
[model] => news
[modelname] => 新闻模型
[template] => news.html
[templist] => news_list.html
[tempview] => news_view.html
[typedir] => http://localhost/2011-4-30/static/2/7
[grade] => 1
[kindtype] => 1
[child] =>
)

)

[4] => Array
(
[uid] => 8
[kind] => 2
[top] => 2
[pagesize] => 15
[name] => 中国新闻
[sort] => 0
[keywords] =>
[description] =>
[enable] => 1
[html] => 1
[outlink] =>
[model] => news
[modelname] => 新闻模型
[template] => news.html
[templist] => news_list.html
[tempview] => news_view.html
[typedir] => http://localhost/2011-4-30/static/2/8/list_1.html
[grade] => 1
[kindtype] => 0
[child] =>
)

[5] => Array
(
[uid] => 9
[kind] => 2
[top] => 2
[pagesize] => 15
[name] => 俄罗斯新闻
[sort] => 0
[keywords] =>
[description] =>
[enable] => 1
[html] => 1
[outlink] =>
[model] => news
[modelname] => 新闻模型
[template] => news.html
[templist] => news_list.html
[tempview] => news_view.html
[typedir] => http://localhost/2011-4-30/static/2/9/list_1.html
[grade] => 1
[kindtype] => 0
[child] =>
)

[6] => Array
(
[uid] => 10
[kind] => 2
[top] => 2
[pagesize] => 15
[name] => 英国新闻
[sort] => 0
[keywords] =>
[description] =>
[enable] => 1
[html] => 1
[outlink] =>
[model] => news
[modelname] => 新闻模型
[template] => news.html
[templist] => news_list.html
[tempview] => news_view.html
[typedir] => http://localhost/2011-4-30/static/2/10/list_1.html
[grade] => 1
[kindtype] => 0
[child] =>
)

)

)

[1] => Array
(
[uid] => 4
[kind] => 0
[top] => 4
[pagesize] => 15
[name] => 信息分类
[sort] => 6
[keywords] =>
[description] =>
[enable] => 1
[html] => 1
[outlink] =>
[model] => info
[modelname] => 分类模型
[template] => info.html
[templist] => info_list.html
[tempview] => info_view.html
[typedir] => http://localhost/2011-4-30/static/4/list_1.html
[grade] => 1
[kindtype] => 0
[child] => Array
(
[0] => Array
(
[uid] => 5
[kind] => 4
[top] => 4
[pagesize] => 15
[name] => 旅游摄影
[sort] => 0
[keywords] => 旅游摄影
[description] => 旅游摄影
[enable] => 1
[html] => 1
[outlink] =>
[model] => info