随机播放不会改变顺序

Shuffle doesn't change the order

php
shuffle

我通过 Simple XML 获得了一个 RSS 提要。我已将其从 arrays/objects 更改为全部 array.

我想随机排列输出，但由于某种原因，它始终是基于日期的顺序。

我下面的代码以及我的 print_r 声明

PHP

$xml = simplexml_load_file($feed);
$order = 1;
$videoFeed   = json_decode(json_encode(array($xml)), true); 
if ($order == 1) {
    shuffle ( $videoFeed );
}
print_r($videoFeed);

Print_r($videoFeed)

Array
(
    [0] => Array
        (
            [link] => Array
                (
                    [@attributes] => Array
                        (
                            [rel] => self
                            [href] => https://www.youtube.com/feeds/videos.xml?playlist_id=PLx0GbZ0m42LqeIybI2x_bBLGlo85-5VNg
                        )

                )

            [id] => yt:playlist:PLx0GbZ0m42LqeIybI2x_bBLGlo85-5VNg
            [title] => Best Joomla! Videos
            [author] => Array
                (
                    [name] => Eoin Oliver
                    [uri] => https://www.youtube.com/channel/UCGkX76DCQlWTdjP3CWNbC-A
                )

            [published] => 2019-06-28T17:37:33+00:00
            [entry] => Array
                (
                    [0] => Array
                        (
                            [id] => yt:video:fouYgPJR5Jc
                            [title] => JD19AT  - Optimizing the Joomla back-end
                            [link] => Array
                                (
                                    [@attributes] => Array
                                        (
                                            [rel] => alternate
                                            [href] => https://www.youtube.com/watch?v=fouYgPJR5Jc
                                        )

                                )

                            [author] => Array
                                (
                                    [name] => J and Beyond e.V.
                                    [uri] => https://www.youtube.com/channel/UCy6ThiEDnalZOd_pgtpBk1Q
                                )

                            [published] => 2019-03-30T16:25:40+00:00
                            [updated] => 2019-04-09T20:16:34+00:00
                        )

                    [1] => Array
                        (
                            [id] => yt:video:70Kx00H_cLI
                            [title] => JD19AT  - KEYNOTE - Introducing Joomla 4 for Content Creators
                            [link] => Array
                                (
                                    [@attributes] => Array
                                        (
                                            [rel] => alternate
                                            [href] => https://www.youtube.com/watch?v=70Kx00H_cLI
                                        )

                                )

                            [author] => Array
                                (
                                    [name] => J and Beyond e.V.
                                    [uri] => https://www.youtube.com/channel/UCy6ThiEDnalZOd_pgtpBk1Q
                                )

                            [published] => 2019-03-30T08:55:39+00:00
                            [updated] => 2019-04-29T13:10:49+00:00
                        )
~

提要有效，但始终采用相同的顺序。我是否误解了 $shuffle 函数？

问题是您在编写 array($xml) 时向数据添加了额外的数组容器级别。所以 $videoFeed 中只有一个元素，重新排序无效。

尝试

$videoFeed   = json_decode(json_encode($xml), true);

然后问题是提要项不是此数据的顶层，它们位于数组的 entry 元素中。所以你应该这样做：

if ($order == 1) {
    shuffle($videoFeed['entry']);
}

为避免过度使用 ['entry'] 并避免 array_chunk 出现问题，您可以将数组向上移动一级。首先将它设为一个数组，以防将来需要数组的任何部分。然后像这样向上移动一步：

$videoFeed      = json_decode(json_encode($xml), true); 
$videoFeedEntry = $videoFeed['entry'];
if ($order == 1) {
    shuffle($videoFeedEntry);
}