Access/change html-tags contained in elementvalues

polarbear · December 25th, 2007, 09:43 AM

Hi,

I'm using php XMLWriter to create XML dynamically for transformation with an XSL-File. The data is obtained from a database.
Some XML element values contain HTML with e.g. img-tags in it:

Code:

<page>
  <text>
    Here are some images: &lt;img src=&quot;pic1.jpg&quot; &gt; und &lt;img src=&quot;pic.jpg&quot;&gt;
  </text>
</page>

As you can see the contents are automatically escaped (using e.g. php->XMLWriter->createElement()).
Now I would like to change the path of the images set in the src-attribute of the img-tags to e.g. images/pic1.jpg and imgaes/pic2.jpg. I want to avoid storing the location of the images within the HTML-contents.

Here's my approach that doesn't work:

Code:

<xsl:param name="urlImages" select="'images/'"/>

<xsl:template match="page/text">
 <xsl:apply-templates/>
</xsl:template>

<xsl:template match="text()">
  <xsl:value-of select="."/>
</xsl:template>

<xsl:template match="img/@src">
  <xsl:attribute name="src">
    <xsl:value-of select="concat($urlImages,.)"/>
  </xsl:attribute>  
</xsl:template>

Question:
Is there a way to access the src-attribute of the img-tags?

Thanks and best regards
polarbear

joefawcett · December 26th, 2007, 05:36 AM

Because you are adding the img elements as text rather than XML what you want to do is extremely difficult. It would involve parsing the strings, unless you are using XSLT 2.0 then this is a really painful process. The easiest way to solve this consists of two steps. Firstly make sure the img data is well formed XML, instead of HTML use XHTML so the img elements are closed:

Code:

<img src="..." />

You don't even have to use XHTML as you will be transforming anyway, as long as the data is well formed, for example you could use:

Code:

<image source="..." />

In the transform stage you turn this into normal (X)HTML.

Then add them as elements, not strings. I am unfamiliar with PHP's XML library but this will mean modifying how the database data is turned into XML>

--

Joe (Microsoft MVP - XML)

polarbear · December 26th, 2007, 07:08 AM

Dear Joe,

thanks for replying.

Code:

Then add them as elements, not strings. I am unfamiliar with PHP's XML library but this will mean modifying how the database data is turned into XML

.
Just to understand you right, is this what you mean:

Code:

<page>
  <text1>Here are some images: </text1>
  <img src="pic1.jpg" />
  <text2> and </text2>
  <img src="pic2.jpg" />
  <text3> Some text following.. </text3>
</page>

polarbear

joefawcett · December 26th, 2007, 07:23 AM

Yes. Then you'll be able to manipulate the XML easily.

--

Joe (Microsoft MVP - XML)