Description:
------------
As far as I can tell, the setParameter() function (http://php.net/xsl_xsltprocessor_set_parameter) doesn't support passing DOMDocument objects or DOMNode objects as parameters. 
I was hoping to get it to work like it does in the .NET 2.0 framework. (See http://msdn2.microsoft.com/en-us/library/system.xml.xsl.xsltargumentlist.addparam.aspx)
But after looking at the PHP 5.2.1 source code, /php-5.2.1/ext/xsl/xsltprocessor.c line 604-650, it appears that it's not possible to do so in PHP even though it appears that libxslt supports it (see http://xmlsoft.org/XSLT/html/libxslt-variables.html#xsltParseGlobalParam)


Reproduce code:
---------------
...
$xslt = new XSLTProcessor();
//load stylesheet
...
$param = new DOMDocument();
$param->loadXML('<params><param name="value" /></params>');

$xslt->setParameter('', 'PARAMS', $param);
...
//use the value like this in the XSL
<xsl:param name="PARAMS" />
...
<xsl:value-of select="$PARAMS/params/param/@name" />
<!-- should output 'value' -->

Expected result:
----------------
The function should take the whole XML blob that's passed in and make it available to the XSL as a global parameter variable.

Actual result:
--------------
Just a misleading warning ("Wrong parameter count")