诡异事件，数组有关问题

$list=Array
(
    [page] => Array
        (
            [page_id] => 1,
            [path] => tiyee.html,
            [templates] => zj001.tpl,
            [key] => 21212121,
        ),

    [qianggou] => Array
        (
            [object_id] => 1,
            [number] => 0,
            [oldprice] => 0.00,
            [newprice] => 0.00,
            [begintime] => 0000-00-00 00:00:00,
            [endtime] => 0000-00-00 00:00:00,
            [limit_b] => 0000-00-00 00:00:00,
            [limit_e] => 0000-00-00 00:00:00,
            [type] => 1,
            [saleout] => 0,
            [classtime] => 0000-00-00 00:00:00,
            [page_id] => 1,
        ),

    [miaosha] => Array
        (
            [object_id] => 2,
            [number] => 0,
            [oldprice] => 0.00,
            [newprice] => 0.00,
            [begintime] => 2010-04-18 23:42:10,
            [endtime] => 2010-04-18 23:42:10,
            [limit_b] => 2010-04-18 23:42:10,
            [limit_e] => 2010-04-18 23:42:10,
            [type] => 2,
            [saleout] => 0,
            [classtime] => 0000-00-00 00:00:00,
            [page_id] => 1,
        )

)

echo '<pre>';
print_r($list['page']);

$list=array(
    'page' => array (
            'page_id' => 1,
            'path' => 'tiyee.html',
            'templates' => 'zj001.tpl',
            'key' => 21212121
        )
);
print_r($list['page']);