xsltProcessor setParameter : send an undefined number of params

Question

I have an XSL file.

I have a PHP file with a XSLTProcessor named $bob.

I want to send to my xsl transformation some parameters.

So, I write

Answer 1

Well decide on a separator character for your messages (i.e. a character that is ensured not to occur in a message), then pass in a string with the messages separated by that character e.g. if you choose | you pass in $bob->setParameter('', 'message', "Hi|It's Bob|How are you?");, then in your XSLT code to be used with libxslt use e.g.

<xsl:stylesheet
  xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
  version="1.0"
  xmlns:str="http://exslt.org/strings"  
  exclude-result-prefixes="str">

<xsl:param name="message"/>

<xsl:variable name="msgs-rtf">
  <messages>
    <xsl:for-each select="str:tokenize($message, '|')">
       <message>
         <xsl:value-of select="."/>
       </message>
    </xsl:for-each>
  </messages>
</xsl:variable>

<xsl:template match="/">
  <xsl:copy-of select="$msgs-rtf"/>
</xsl:template>

</xsl:stylesheet>

As far as I know that extension function str:tokenize is supported in libxslt which PHP 5 uses for XSLT so you should be able to use it. Or you need to write a template that does the tokenization in XSLT itself

Answer 2

How about concatenation in PHP?

$bob->setParameter("", "message", "Hi:it's bob:How are you ?");

and tokenization in XSLT code:

<messages>
<xsl:for-each select="tokenize($message,':')">
<message>
<xsl:value-of select="." />
</message>
</xsl:for-each>
</messages>

Answer 3

I would just have one parameter, that is an XML document. I would create this XML document before I invoke the transformation.

This has some definit benefits compared to sending a single, pipe-delimited string:

1. Every parameter is in its own element and this can be matched by a separate template in XSLT.

2. No recursive processing of a pipe-delimited string and no extension functions are needed.

3. More extensible and scalable.