使用FETCH_FEED组合RSS提要和排序

我正在尝试创建一个来自5个不同feed的最近10篇文章的feed，所有这些文章都合并到一个列表中。我找到了一种合并提要的方法，但无法轻松地将其限制为10个，并按日期进行排序。

有人能给我指出正确的方向吗？谢谢

<ul>
<?php $rsslist = array(
\'http://www.nrel.gov/news/press/rss/rss.xml\',
\'http://www.pewenvironment.org/rss/campaigns-8589935316\',
\'http://www.ashrae.org/RssFeeds/ashrae.xml\',
\'http://www.districtenergy.org/blog/category/idea-activity/feed/\',
\'http://www.districtenergy.org/blog/category/industry-news/feed/\'
 );

$feedlist = array();
foreach ( $rsslist as $rssurl ) $feedlist []= fetch_feed( $rssurl ); /* store in feed array for later access */

$current_item_cycle = 0;
while ( sizeof($feedlist) ) { /* while feedlist is not empty */ 

    foreach ( $feedlist as $index => $feed ) { /* cycle through each feed */

        if (!$item = $feed->get_item($current_item_cycle++)) unset($feedlist[$index]); /* if feed has not more items unset */

        else /* echo it out */ { ?>
            <li>
            <?php echo $item->get_date(\'j F Y | g:i a\') . $item->get_permalink(); ?>
            </li>
        <?php }
    }
} ?>
</ul>

<ul> <?php $rsslist = array( #\'http://www.pewenvironment.org/rss/campaigns-8589935316\', \'http://www.ashrae.org/RssFeeds/ashrae.xml\', \'http://www.districtenergy.org/blog/category/idea-activity/feed/\', \'http://www.districtenergy.org/blog/category/industry-news/feed/\', \'http://www.nrel.gov/news/press/rss/rss.xml\' ); // Fetch all of the feeds into a simplePie mashup $rss = fetch_feed($rsslist); // Set the max items to either 10 or all items if there are less than 10 $maxitems = $rss->get_item_quantity(10); // Get the items (0-10) $rss_items = $rss->get_items(0, $maxitems); // If there are no items, output that if ($maxitems == 0) { echo \'<li>No items.</li>\'; // Otherwise loop over the items } else { foreach ( $rss_items as $item ) { ?> <li> <?php echo $item->get_date() . $item->get_permalink(); ?> </li> <?php } } ?> </ul>

小码农CODE

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