将转换应用于包含转义 HTML 的 XML 属性 [英] Apply transforms to XML attribute containing escaped HTML
问题描述
我有一些像这样的 XML:
I have some XML that looks like this:
<?xml version="1.0" encoding="UTF-8"?>
<root>
<issue xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<comment text="<div class="wiki text"><h4>Tom Fenech</h4>Here is a comment</div> "/>
</issue>
</root>
如您所见,comment
节点中的 text
属性包含转义的 HTML.我想将属性的内容作为 XHTML 获取,我目前在模板中使用:
As you can see, the text
attribute in the comment
node contains escaped HTML. I would like to get the contents of the attribute as XHTML, which I currently do this inside a template using:
<xsl:value-of select="@text" disable-output-escaping="yes" />
这让我得到了最终输出中的 HTML:
That gets me the HTML in the final output:
<div class="wiki text"><h4>Tom Fenech</h4>Here is a comment</div>
但我希望能够提取 <h4>
标记的内容以在其他地方使用.一般来说,一旦它被转义,能够操纵它的内容会很好.
But I want to be able to extract the contents of the <h4>
tag to use elsewhere. In general, it would be nice to be able to manipulate the contents of this once it has been escaped.
如何将更多模板应用到
的输出?
How do I apply further templates to the output of the <xsl:value-of />
?
我目前正在使用 PHP 内置 XSLT 处理器,它支持XSLT 1.0 版,但如果较新版本的功能使这成为可能,我愿意考虑使用替代处理器.
I am currently using the PHP built-in XSLT processor, which supports XSLT version 1.0, although I would be willing to consider using an alternative processor if features from newer versions make this possible.
推荐答案
这里有一种方法可以做到,从 XSLT 调用 PHP 函数:
Here's one way you could do it, by calling into a PHP function from XSLT:
function parseHTMLString($html)
{
$doc = new DOMDocument();
$doc->loadHTML($html);
return $doc;
}
$xml = <<<EOB
<root>
<issue xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<comment text="<div class="wiki text"><h4>Tom Fenech</h4>Here is a comment</div> "/>
</issue>
</root>
EOB;
$xsl = <<<EOB
<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:php="http://php.net/xsl"
xsl:extension-element-prefixes="php">
<xsl:output method="html" encoding="utf-8" indent="yes"/>
<xsl:template match="comment">
<xsl:apply-templates select="php:functionString('parseHTMLString', @text)//div/h4"/>
</xsl:template>
<xsl:template match="div/h4">
<h2><xsl:apply-templates/></h2>
</xsl:template>
</xsl:stylesheet>
EOB;
$xmldoc = new DOMDocument();
$xmldoc->loadXML($xml);
$xsldoc = new DOMDocument();
$xsldoc->loadXML($xsl);
$proc = new XSLTProcessor();
$proc->registerPHPFunctions('parseHTMLString');
$proc->importStyleSheet($xsldoc);
echo $proc->transformToXML($xmldoc);
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