php - 用 PHP 解析谷歌新闻 RSS

Question

我想用 PHP 解析 Google 新闻 rss。我设法运行了这段代码:

<?
$news = simplexml_load_file('http://news.google.com/news?pz=1&cf=all&ned=us&hl=en&topic=n&output=rss');

foreach($news->channel->item as $item) {
    echo "<strong>" . $item->title . "</strong><br />";
    echo strip_tags($item->description) ."<br /><br />";
}
?>

但是，我无法解决以下问题。例如:

1. 如何获取新闻标题的超链接？
2. 因为每个 Google 新闻在页脚中都有许多相关的新闻链接(我上面的代码也包括它们)。如何从描述中删除这些内容？
3. 我怎样才能得到每条新闻的图像？ (Google 显示每条新闻的缩略图)

谢谢。

Answer 1

我们开始吧，正是您的特定情况所需要的:

<?php
$news = simplexml_load_file('http://news.google.com/news?pz=1&cf=all&ned=us&hl=en&topic=n&output=rss');

$feeds = array();

$i = 0;

foreach ($news->channel->item as $item) 
{
    preg_match('@src="([^"]+)"@', $item->description, $match);
    $parts = explode('<font size="-1">', $item->description);

    $feeds[$i]['title'] = (string) $item->title;
    $feeds[$i]['link'] = (string) $item->link;
    $feeds[$i]['image'] = $match[1];
    $feeds[$i]['site_title'] = strip_tags($parts[1]);
    $feeds[$i]['story'] = strip_tags($parts[2]);

    $i++;
}

echo '<pre>';
print_r($feeds);
echo '</pre>';
?>

输出应该是这样的:

[2] => Array
        (
            [title] => Los Alamos Nuclear Lab Under Siege From Wildfire - ABC News
            [link] => http://news.google.com/news/url?sa=t&fd=R&usg=AFQjCNGxBe4YsZArH0kSwEjq_zDm_h-N4A&url=http://abcnews.go.com/Technology/wireStory?id%3D13951623
            [image] => http://nt2.ggpht.com/news/tbn/OhH43xORRwiW1M/6.jpg
            [site_title] => ABC News
            [story] => A wildfire burning near the desert birthplace of the atomic bomb advanced on the Los Alamos laboratory and thousands of outdoor drums of plutonium-contaminated waste Tuesday as authorities stepped up ...
        )