php - foreach取得stdClass Object

Question

以下是获取到的图文newsJSON数据，请问foreach如何获取到如title、author、digest等这些值呢？

stdClass Object
(
    [item] => Array
        (
            [0] => stdClass Object
                (
                    [media_id] => media_id1
                    [content] => stdClass Object
                        (
                            [news_item] => Array
                                (
                                    [0] => stdClass Object
                                        (
                                            [title] => 标题1
                                            [author] => 作者1
                                            [digest] => 摘要1
                                            [content] => 内容1
                                            [content_source_url] =>
                                            [thumb_media_id] => media_id1
                                            [show_cover_pic] => 0
                                            [url] => http://mp.weixin.qq.com/
                                            [thumb_url] => http://mmbiz.qpic.cn/mmbiz/jpeg
                                            [need_open_comment] => 0
                                            [only_fans_can_comment] => 0
                                        )
                                )
                            [create_time] => 1438240064
                            [update_time] => 1438307092
                        )
                    [update_time] => 1438307092
                )
            [1] => stdClass Object
                (
                    [media_id] => media_id2
                    [content] => stdClass Object
                        (
                            [news_item] => Array
                                (
                                    [0] => stdClass Object
                                        (
                                            [title] => 标题2
                                            [author] => 作者2
                                            [digest] => 摘要2
                                            [content] => 内容2
                                            [content_source_url] =>
                                            [thumb_media_id] => media_id2
                                            [show_cover_pic] => 0
                                            [url] => http://mp.weixin.qq.com/
                                            [thumb_url] => http://mmbiz.qpic.cn/mmbiz/jpeg
                                            [need_open_comment] => 0
                                            [only_fans_can_comment] => 0
                                        )
                                )
                            [create_time] => 1438156103
                            [update_time] => 1444380718
                        )
                    [update_time] => 1444380718
                )
                )
    [total_count] => 5
    [item_count] => 4
)

Answer 1

个人建议最好将json字符串转换成数组而不是对象，这样便于后续操作，也便于阅读。

mixed json_decode ( string $json [, bool $assoc = false [, int $depth = 512 [, int $options = 0 ]]] )

assoc 当该参数为 TRUE 时，将返回 array 而非 object 。
试着将json_decode()第二个参数置为true。

Answer 2

假设上面的对象名为obj

$data = array();
foreach ($obj->item as $item) {
    $data[] = $item->content->new_item[0];
}
var_dump($data);

Answer 3

雷雷

Answer 4

好好理解@windfly说的,
访问stdClass Object属性, 用:

$obj->title;

访问数组属性用:

$obj['title'];

显然你取不到, 是用 $obj['title'] 这样的写法写的