带有原子命名空间的 XPATH [英] XPATH with atom namespace

问题描述

我有两个问题.让 XPATH 使用 atom 命名空间并从 CDATA 字段获取数据.

I'm having two problems. Getting XPATH to work with atom namespace and getting data from a CDATA field.

我拥有的 xml 看起来像

The xml that I have looks like

<?xml version="1.0" encoding="UTF-8" ?>
<entry xmlns="http://www.w3.org/2005/Atom" xmlns:kml="http://www.opengis.net/kml/2.2">
    <title type="text"><![CDATA[Hello World]]></title>
</entry>

虽然我的 PHP 看起来像

While my PHP looks like

 $xml = new SimpleXMLElement(file_get_contents($this->xmlFile));
 $xml->setAttributeNS( "http://www.w3.org/2005/Atom");
 $xml->registerXpathNamespace('kml' , 'http://www.opengis.net/kml/2.2');

 $result = $xml->xpath('/entry/title');
 var_dump($result);

从 XML 中删除 atom 命名空间允许我的 xpath 工作.但是如何让 simplexml 接受原子作为命名空间?此外，当我获取数据(没有原子)时，我无法获取文本，因为它的格式为 CDATA，我如何才能显示 CDATA 文本?

Removing the atom namespace from the XML allows my xpath to work. But how do I get simplexml to accept atom as a namespace? Also when I do get data (without atom) I can't get the text because it's formatted as CDATA, how can I get show the CDATA text?

推荐答案

来自 PHP 文档 (http://us1.php.net/manual/en/domelement.setattributens.php):

From the PHP documentation (http://us1.php.net/manual/en/domelement.setattributens.php):

将具有命名空间 namespaceURI 和名称 name 的属性设置为给定值.如果该属性不存在，则会创建该属性.

Sets an attribute with namespace namespaceURI and name name to the given value. If the attribute does not exist, it will be created.

你不想设置命名空间，但你想声明它以便你可以使用它，所以改变:

You do not want to set a namespace, but you want to declare it so you can use it, so change:

$xml->setAttributeNS( "http://www.w3.org/2005/Atom");

致:

$xml->registerXpathNamespace('atom' , 'http://www.w3.org/2005/Atom');

之后，您可以在 XPath 中使用该前缀:

After that you can use that prefix into your XPath:

$result = $xml->xpath('/atom:entry/atom:title');

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