Re: Fun with XSLT

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Matthew Croud wrote:
> Hi Guys,
> 
> Well i;ve been slaving on with my PHP XML endeavors and i'm loving it,
> just finishing the meaty parts of my XSLT for dummies book too.
> 
> I have a question which asks "is it possible?".
> 
> Using XSLT I can collect specific parts of my XML using something sexy
> like <xsl:template match="umbungo">.  Lets say however, that I need to
> use XSLT, but I would want the user to select which element they
> request. In other words, they are given a form with options and that
> form can manipulate the .XSL file.
> 
> Now I know it could be done in a lengthly manner by just opening the XSL
> file and manipulating it like fopen or something like that, but is there
> a way to somehow embed the contents of the xml into the php code (like
> using <<< EOF for html), and being able to substitute the template match
> string for a variable ?
> 
> Any ideas ?
> 
> Thanks Gamesmaster,
> Matt
> 
A bit off-topic (since XSLT is not PHP...) but here goes.

First I need to clarify what you are doing -
<xsl:template match="umbongo"> ... </xsl:template>
defines the template portion, and that is pretty immutable.

At some point you must have in your XSLT something like
<xsl:apply-templates select="umbongo"/>
This is the bit you can play with:

so:


<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform";>
    <xsl:output method="xml" encoding="UTF-8" /> <!-- or whatever -->

<!-- Pass in a parameter to the XSL to define which thing we want to match -->
    <xsl:parameter name='matchMe'/>

<!-- Define templates for all the things we might want to match -->
    <xsl:template match='umbongo'><xsl:apply-templates/></xsl:template>
    <xsl:template match='fivealive'><xsl:apply-templates/></xsl:template>
    <!-- etc. -->

<!-- now the clever bit -->
    <xsl:template match='/'>
        <xsl:apply-templates select='//*[name()=$matchMe]'/>
    </xsl:template>

</xsl:stylesheet>

Essentially you need to apply the template of any element, but only those whose
name matches your request.
Note that
<xsl:apply-templates select='$matchMe]'/>
doesn't work... :(

So now if your PHP does something like

$xslDom = new DOMDocument();
$xslDom->load('matchMe.xsl');
$xslt = new XSLTProcessor();
$xslt->importStylesheet($xslDom);
$xslt->setParameter('','matchMe','umbongo');
$xmlDom = new DOMDocument();
$xmlDom->load('some_document_that_has_an_umbongo_tag.xml');
echo $xslt->transformToXML($xmlDom);

you should get the results of the 'umbongo' template (only)


'f course, this is not tested, but I have used this idea in working code




-- 
Peter Ford                              phone: 01580 893333
Developer                               fax:   01580 893399
Justcroft International Ltd., Staplehurst, Kent

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