Twitter API - 从 PHP 中的大型数组中提取一个值

Question

这是我从 Twitter API 调用返回的数组的第一部分。我正在尝试提取 [expanded_url] 变量并将其存储到另一个数组中。我让它适用于 [id] 或 [text] 等顶级项目，但我不确定如何访问更深层次的元素。

Array
(
    [statuses] => Array
        (
            [0] => Array
                (
                    [metadata] => Array
                    (
                        [iso_language_code] => en
                        [result_type] => recent
                    )

                [created_at] => Thu Mar 26 21:02:42 +0000 2015
                [id] => 581199619855650816
                [id_str] => 581199619855650816
                [text] => RT @JamilSays: 150 people recently died in a plane crash, ISIS is beheading innocent people, and you guys are bitching over Zayn leaving 1D…
                [source] => Twitter for iPhone
                [truncated] => 
                [in_reply_to_status_id] => 
                [in_reply_to_status_id_str] => 
                [in_reply_to_user_id] => 
                [in_reply_to_user_id_str] => 
                [in_reply_to_screen_name] => 
                [user] => Array
                    (
                        [id] => 546187115
                        [id_str] => 546187115
                        [name] => Medina ✨
                        [screen_name] => Medinabtnc
                        [location] => 
                        [profile_location] => 
                        [description] => Bosnia and Herzegovina // Belgium // FC BAYERN MÜNCHEN ♡
                        [url] => http://t.co/z1LwFoDZ6U
                        [entities] => Array
                            (
                                [url] => Array
                                    (
                                        [urls] => Array
                                            (
                                                [0] => Array
                                                    (
                                                        [url] => http://t.co/z1LwFoDZ6U
                                                        [expanded_url] => http://izzzyyxo.tumblr.com
                                                        [display_url] => izzzyyxo.tumblr.com
                                                        [indices] => Array
                                                            (
                                                                [0] => 0
                                                                [1] => 22
                                                            )

                                                    )

                                            )

                                    )

                                [description] => Array
                                    (
                                        [urls] => Array
                                            (
                                            )

                                    )

                            )

这是我用来访问和回显 [id] 的代码。我需要修改它以找到 [expanded_url]

foreach($string['statuses'] as $items)
    {

        echo  $items['id']."<br />";
    }

一旦我能够在循环中优化 [expanded_url]，我想尽可能将每个 URL 存储到一个数组中！

Answer 1

这似乎在大多数情况下都有效，但有时它确实会导致错误。

foreach($string['statuses'] as $items)
{
    if($items['user']['entities']['url']['urls']['0']['expanded_url'] !="")
    echo  $items['user']['entities']['url']['urls']['0']['expanded_url']."<br />";