PHP 简单 HTML DOM 解析器 - RSS 中的链接元素

Question

我刚开始使用 PHP Simple HTML DOM Parser (http://simplehtmldom.sourceforge.net/)，在解析 XML 时遇到了一些问题。

我可以完美地解析来自 HTML 文档的所有链接，但无法解析来自 RSS 提要(XML 格式)的链接。例如，我想解析来自 http://www.bing.com/search?q=ipod&count=50&first=0&format=rss 的所有链接。所以我使用这段代码:

$content = file_get_html('http://www.bing.com/search?q=ipod&count=50&first=0&format=rss');

foreach($content->find('item') as $entry)
{
$item['title']     = $entry->find('title', 0)->plaintext;
$item['description']    = $entry->find('description', 0)->plaintext;
$item['link'] = $entry->find('link', 0)->plaintext;
$parsed_results_array[] = $item;
}

print_r($parsed_results_array);

脚本解析标题和描述，但链接元素为空。有任何想法吗？我的猜测是“链接”是保留字之类的，那么我该如何让解析器工作呢？

Answer 1

我建议您使用正确的工具来完成这项工作。使用 SimpleXML:另外，它是内置的 :)

$xml = simplexml_load_file('http://www.bing.com/search?q=ipod&count=50&first=0&format=rss');
$parsed_results_array = array();
foreach($xml as $entry) {
    foreach($entry->item as $item) {
        // $parsed_results_array[] = json_decode(json_encode($item), true);
        $items['title'] = (string) $item->title;
        $items['description'] = (string) $item->description;
        $items['link'] = (string) $item->link;
        $parsed_results_array[] = $items;
    }
}

echo '<pre>';
print_r($parsed_results_array);

应该产生如下内容:

Array
(
    [0] => Array
        (
            [title] => Apple - iPod
            [description] => Learn about iPod, Apple TV, and more. Download iTunes for free and purchase iTunes Gift Cards. Check out the most popular TV shows, movies, and music.
            [link] => http://www.apple.com/ipod/
        )

    [1] => Array
        (
            [title] => iPod - Wikipedia, the free encyclopedia
            [description] => The iPod is a line of portable media players designed and marketed by Apple Inc. The first line was released on October 23, 2001, about 8½ months after ...
            [link] => http://en.wikipedia.org/wiki/IPod
        )