Question

我试图在Feed中抓取一个img标签，在WordPress中。以下是我使用的代码：

<?php
/* specify the source feed   */     $rss = fetch_feed('http://www.anobii.com/rss_shelf?s=01fe251a6c442bbf8a');
/* checks obj. is created    */     if (!is_wp_error( $rss ) ) :
/* specify number of items   */     $maxitems = $rss->get_item_quantity(5);
/* create an array of items  */     $rss_items = $rss->get_items(0, $maxitems);
endif;
?>
<ul>
    <?php if ($maxitems == 0) echo '<li>Content not available</li>';
else
    // Loop through each feed item and display each item as a hyperlink.
    $firstContent = null;
    $firstIsSet = false;
    foreach ( $rss_items as $item ) : ?>
    <?php
    if (!$firstIsSet) {
        $firstContent = $item->get_content();
        $firstIsSet = true;
    }
    ?>
    <?php $doc = new DOMDocument();
    @$doc->loadHTML($firstContent);
    $imgs = $doc->getElementsbyTagName('img');
    $res = $imgs->item(0)->getAttribute('src');
    $highres = str_replace("type=3", "type=4", $res);
    ?>
        <li>
            <a href="<?php echo $item->get_permalink(); ?>" title="<?php echo esc_html( $item->get_title() ); ?>" rel="external"><?php echo esc_html( $item->get_title() ); ?></a>
        </li>
        <?php endforeach; ?>
</ul>
<img src="<?php print_r($highres); ?>" style="float:right">

get_title()和get_permalink正常运作。但是print_r($highres);什么也没做。

问题可能是rss feed有点坏（请参阅fetch_feed链接）..？

PHP DOMDocument：getElementsbyTagName（'img'）不起作用

0 个答案: