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PHP : Function Reference : XSL functions : XSLTProcessor::transformToXML


Transform to XML ()

Example 2656. Transforming to a string


// Load the XML source
$xml = new DOMDocument;

$xsl = new DOMDocument;

// Configure the transformer
$proc = new XSLTProcessor;
$proc->importStyleSheet($xsl); // attach the xsl rules

echo $proc->transformToXML($xml);


The above example will output:

Hey! Welcome to Nicolas Eliaszewicz's sweet CD collection!

<h1>Fight for your mind</h1><h2>by Ben Harper - 1995</h2><hr>
<h1>Electric Ladyland</h1><h2>by Jimi Hendrix - 1997</h2><hr>

Related Examples ( Source code ) » xsl xsltprocessor transform to xml

Code Examples / Notes » xsl xsltprocessor transform to xml


transformToXML, if you have registered PHP functions previously, does indeed attempt to execute these functions when it finds them in a php:function() pseudo-XSL function. It even finds static functions within classes, for instance:
<xsl:value-of select="php:function('MyClass::MyFunction', string(@attr), string(.))" disable-output-escaping="yes"/>
However, in this situation transformToXML does not try to execute "MyClass::MyFunction()". Instead, it executes "myclass:myfunction()". In PHP, since classes and functions are (I think) case-insensitive, this causes no problems.
A problem arises when you are combining these features with the __autoload() feature. So, say I have MyClass.php which contains the MyFunction definition. Generally, if I call MyClass::MyFunction, PHP will pass "MyClass" to __autoload(), and __autoload() will open up "MyClass.php".
What we have just seen, however, means that transformToXML will pass "myclass" to __autoload(), not "MyClass", with the consequence that PHP will try to open "myclass.php", which doesn't exist, instead of "MyClass.php", which does. On case-insensitive operating systems, this is not significant, but on my RedHat server, it is--PHP will give a file not found error.
The only solution I have found is to edit the __autoload() function to look for class names which are used in my XSL files, and manually change them to the correct casing.
Another solution, obviously, is to use all-lowercase class and file names.


The transformToXML function can produce valid XHTML output - it honours the <xsl:output> element's attributes, which defines the format of the output document.
For instance, if you want valid XHTML 1.0 Strict output, you can provide the following attribute values for the <xsl:output> element in your XSL stylesheet:
doctype-public="-//W3C//DTD XHTML 1.0 Strict//EN" />


The function transformToXML has a problem with the meta content type tag. It outputs it like this:
   <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
which is not correct X(HT)ML, because it closes with '>' instead of with '/>'.
A way to get the output correct is to use instead of transformToXML first transformToDoc anf then saveHTML:
   $domTranObj = $xslProcessor->transformToDoc($domXmlObj);
   $domHtmlText = $domTranObj->saveHTML();

thomas praxl

I noticed an incompatibility between libxslt (php4) and the transformation through XSLTProcessor.
Php5 and the XSLTProcessor seem to add implicit CDATA-Section-Elements.
If you have an xslt like
<script type="text/javascript">
foo('<xsl:value-of select="bar" />');
It will result in
<script type="text/javascript"><![CDATA[
(at least for output method="xml" in order to produce strict xhtml with xslt1)
That brings up an error (at least) in Firefox 1.5 as it is no valid javascript.
It should look like that:
<script type="text/javascript">//<![CDATA[
As the CDATA-Section is implicit, I was not able to disable the output or to put a '//' before it.
I tried everything about xsl:text disable-output-escaping="yes"
I also tried to disable implicit adding of CDATA with <output cdata-section-elements="" />
(I thought that would exclude script-tags. It didn't).
The solution:
<xsl:text disable-output-escaping="yes">&lt;script type="text/javascript"&gt;
 foo('</xsl:text><xsl:value-of select="bar" /><xsl:text disable-output-escaping="yes">');
Simple, but it took me a while.


How to fix:: *Fatal error: Call to undefined method domdocument::load()*
If you get this error, visit the php.ini file and try commenting out the following, like this:
Suddenly, the wonderfully simple example above works as advertised.

jeandenis dot boivin

$domTranObj = $xslProcessor->transformToDoc($domXmlObj);
$domHtmlText = $domTranObj->saveHTML();
Do fix the <meta> for valid XHTML but do not correctly end empty node like <br /> which ouput like this :
Some browser note this as 2 different <br /> ...
To fix this use
$domTranObj = $xslProcessor->transformToDoc($domXmlObj);
$domHtmlText = $domTranObj->saveXML();

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