PHP code from XSL won't execute

[Dormilich]

Hi,

I'm running into a problem with the <xsl:processing-instruction> element (Sablotron).

purpose:
I generate a xhtml fragment from a xml file via xslt. This is printed (echo) to the output (i.e. all xml/xsl processing is done on the server). This is fine, as long as the output contains only xhtml.

problem:
one special page uses AJAX, where the result is taken from a MySQL database. To make it easier writing copy, I (sucessfully) use php code to paste the link (and the content, if Javascript is not activated):

# top of included file
# lib.db.php is used for MySQL processing
    include_once(SYS_DIR . "lib.db.php");
    $artikel =& new AjaxRequest;
 
# for each link
    $artikel->getArticle("__DB-entry-ID__");
 

this will result in:

# for each link
  <div id="__DB-entry-ID__" class="einzug">
    <a id="a__DB-entry-ID__" class="cfa" href="main.php?AOD=__DB-entry-ID__#a__DB-entry-ID__">Artikeltext anschauen</a>
  </div>
 

so far no problem when I include it from a file–but now the same as output from a xsl transformation:

It will readily transform the <xsl:processing-instruction> into php code, but the code is not parsed afterwards (even though the DOM recognizes it later as a processing instruction) it looks more like a CDATA section. I find the PHP code afterwards in the xhtml file, just like that:

<?php
    include_once(SYS_DIR . "lib.db.php");
    $artikel =& new AjaxRequest;
?>
  <h4><a class="hook" id="h6">__Title-of-Item__</a></h4>
  <p>__Publication-Date__, __Newspaper-Name__</p>
  <div class="mitte">
    <img src="bilder/presse/__IMG-source__" title="__IMG-title__" width="__IMG-width__" height="__IMG-height__" />
  </div>
<?php
    $artikel->getArticle("__DB-entry-ID__");
?>
 

does anyone have an idea, how I can get PHP to parse the output from the xsl transformation?

thanks in advance

file listings:

xml file (presse.xml) (representative entry):

<!DOCTYPE presse [ ... ]]>
<presse
    xmlns="http://www.kulturbeutel-leipzig.net/XML/presse"
    xmlns:link="http://www.kulturbeutel-leipzig.net/XML/link"
    xmlns:dcterms="http://purl.org/dc/terms/">
 
<collection title="__Title-of-Item__">
  <item db="__DB-entry-ID__">
    <zeitung>__Newspaper-Name__</zeitung>
    <datum>__Publication-Date__</datum>
    <thumbnail src="__IMG-source__" wdt="__IMG-width__" hgt="__IMG-height__">
       <title>__IMG-Title__</title>
    </thumbnail>
  </item>
</collection>
 
</presse>
 

xsl file (sys.presse.xsl)
(I skip the further templates here, because they don't provide more information):

<?xml version="1.0" encoding="iso-8859-1" ?>
<xsl:stylesheet version="1.0"
    xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
    xmlns:html="http://www.w3.org/1999/xhtml"
    xmlns:presse="http://www.kulturbeutel-leipzig.net/XML/presse">
 
<xsl:output
    method="xml"
    encoding="iso-8859-1"
    omit-xml-declaration="yes"
    indent="yes" />
 
<xsl:template match="/">
  <xsl:element name="div">
    <xsl:attribute name="id">
      <xsl:text>zeitung</xsl:text>
    </xsl:attribute>
 
    <xsl:text>
  </xsl:text>
    <xsl:element name="h1">
      <xsl:text>Zeitungsausschnitte</xsl:text>
    </xsl:element>
 
    <xsl:text>
  </xsl:text>
    <xsl:element name="p">
      <xsl:attribute name="class">
        <xsl:text>mitte</xsl:text>
      </xsl:attribute>
      <xsl:text>oder was man so in den Zeitungen so über uns findet …</xsl:text>
    </xsl:element>
 
# here comes the php code, if I don't escape & and > I'll get a parser error
    <xsl:processing-instruction name="php">
    include_once(SYS_DIR . "lib.db.php");
    $artikel =&amp;amp; new AjaxRequest;
    </xsl:processing-instruction>
 
    <xsl:apply-templates />
 
  </xsl:element>
</xsl:template>
 
<xsl:template match="//presse:collection">
  <xsl:call-template name="heading" />
  <xsl:for-each select="child::presse:item">
    <xsl:call-template name="titel" />
    <xsl:if test="attribute::db">
        <xsl:call-template name="text" />
    </xsl:if>
    <xsl:if test="child::presse:thumbnail">
       <xsl:call-template name="bild" />
    </xsl:if>
    <xsl:if test="child::presse:file">
       <xsl:call-template name="download" />
    </xsl:if>
    <xsl:if test="child::presse:url">
       <xsl:call-template name="verweis" />
    </xsl:if>
  </xsl:for-each>
</xsl:template>
</xsl:stylesheet>
 

php calling hierarchy:

top level script: main.php
creates an object and calls the output function

    require_once("system/lib.main.php");
    $inhalt =& new ContentOutput($_GET["__page-ID__"]);
    $inhalt->DataInhalt();
 

php library: lib.main.php
does the part of putting it all together

# the xslt parser (in a nutshell) (SYS_DIR is where all the files are)
 
    function parseXSLT($xml, $xsl, $par = NULL, $args = array()) {
        $xml = SYS_DIR . $xml;
        $xsl = SYS_DIR . $xsl;
        $handle = xslt_create();
        $parsedfile = xslt_process($handle, $xml, $xsl, NULL, $args, $par);
        xslt_free($handle);
        return $parsedfile;
    }
 
# $this->ID is set when calling the object in the first place
# $this->Data is an array of objects containing the information for every web page like: include file or files and parameters for xslt (either of them)
 
    function DataInhalt() {
# set of parameters for xsl processing
        $parameter = NULL;
        $xmlfile = 'Struktur.xml';
        $xslfile = $this->Data[$this->ID]->datei["xsl"];
        $tempxml = $this->Data[$this->ID]->datei["xml"];
        $temppar = $this->Data[$this->ID]->datei["para"];
        $tempfile = $this->Data[$this->ID]->datei["file"];
        if (!empty($tempxml)) {
            $xmlfile = $tempxml;
        }
        if (!empty($temppar)) {
            $parameter = array($temppar => $this->ID);
        }
# if there's a file, include it an quit function
        if (!empty($tempfile)) {
            include(BASE_DIR . $tempfile);
            return;    
        }
# do xsl processing
        if (!$KBL_inhalt = $this->parseXSLT($xmlfile, $xslfile, $parameter)) {
            echo '<p class="mitte b">Parser Error</p>';
            return;
        }
        else {
# print result
             print $KBL_inhalt;
        }
    }
 

System: Apache 1.3.4 / Mac OS X 10.4.11 / PHP 4.3.1 (from entropy.ch)

[Dormilich]

problem solved

I now write the result string to file (at the first page load after the xml was updated) and load that file via include().