这是此处主题的延续:Trying to Parse Only the Images from an RSS Feed
这次我要解析RSS提要中的图像和某些项目。 RSS提要的采样如下所示:
<channel>
<atom:link href="http://mywebsite.com/rss" rel="self" type="application/rss+xml" />
<item>
<title>Article One</title>
<guid isPermaLink="true">http://mywebsite.com/details/e8c5106</guid>
<link>http://mywebsite.com/geturl/e8c5106</link>
<comments>http://mywebsite.com/details/e8c5106#comments</comments>
<pubDate>Wed, 09 Jan 2013 02:59:45 -0500</pubDate>
<category>Category 1</category>
<description>
<![CDATA[<div>
<img src="http://mywebsite.com/myimages/1521197-main.jpg" width="120" border="0" />
<ul><li>Poster: someone's name;</li>
<li>PostDate: Tue, 08 Jan 2013 21:49:35 -0500</li>
<li>Rating: 5</li>
<li>Summary:Lorem ipsum dolor </li></ul></div><div style="clear:both;">]]>
</description>
</item>
<item>..
我在下面的代码中尝试解析图像和文本:
$xml = simplexml_load_file('http://mywebsite.com/rss?t=2040&dl=1&i=1');
$descriptions = $xml->xpath('//item/description');
$mytitle= $xml->xpath('//item/title');
foreach ( $descriptions as $description_node ) {
// The description may not be valid XML, so use a more forgiving HTML parser mode
$description_dom = new DOMDocument();
$description_dom->loadHTML( (string)$description_node );
// Switch back to SimpleXML for readability
$description_sxml = simplexml_import_dom( $description_dom );
// Find all images, and extract their 'src' param
$imgs = $description_sxml->xpath('//img');
foreach($imgs as $image) {
echo "<img id=poster class=poster src={$image['src']}> {$mytitle}";
}
}
以上代码精美地提取图像....但是,当我尝试代码的最后一行时,它不会提取$ mytitle(这将是&#34; Article One&#34;)标记。这应该从RSS提要中的所有项目中提取。
任何人都可以帮我解决这个问题。
非常感谢,
Hernando的
答案 0 :(得分:1)
xpath()
总是返回一个数组(参见http://www.php.net/manual/en/simplexmlelement.xpath.php),即使结果只有一个元素。如果您知道您将需要一个元素,则只需使用$mytitle[0]
。
您必须迭代每个<item/>
元素,否则您无法知道哪个描述和哪个标题属于一起。所以以下内容应该有效:
$xml = simplexml_load_file('test.xml');
$items = $xml->xpath('//item');
foreach ( $items as $item) {
$descriptions = $item->description;
$mytitle = $item->title;
foreach ( $descriptions as $description_node ) {
// The description may not be valid XML, so use a more forgiving HTML parser mode
$description_dom = new DOMDocument();
$description_dom->loadHTML( (string)$description_node );
// Switch back to SimpleXML for readability
$description_sxml = simplexml_import_dom( $description_dom );
// Find all images, and extract their 'src' param
$imgs = $description_sxml->xpath('//img');
foreach($imgs as $image) {
echo "<img id=\"poster\" class=\"poster\" src=\"{$image['src']}\"> {$mytitle}";
}
}
}
顺便说一句,我还在你的<img/>
元素中添加了“”。我想你想要这个,因为它看起来非常像XML / HTML。