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14 years ago
Entities are omitted from the output with the code above.  

The symptom was that &nbsp; 

-- which should work with UTF-8 encoding -- 

did not even get to XSLTProcessor, let alone through it.

After too much hacking I discovered the simple fix:

set substituteEntities to true in the DOMDocument for the XSL file.

That is, replace the loading of the xsl document with



<?php

   $xsl = new DOMDocument;

   $xsl->substituteEntities = true;    // <===added line

   $xsl->load('collection.xsl');

?>



However, this fails when data entries have HTML entity references. (Some database entries may even contain user generated text.) libxml has the pedantic habit of throwing a FATAL error for any undefined entitiy. Solution: hide the entities so libxml doesn't see them.



<?php

function hideEntities($data) { 

        return str_replace("&", "&amp;", $data); 

}

?>



You could just add this to the example, but it is tidier to define a function to load data into a DOMDocument. This way you don't need entity declarations in catalog.xsl, either.



<?php

// Added function for  Example #1  



/** Load an XML file and create a DOMDocument.

Handles arbitrary entities, even undefined ones.

*/

function fileToDOMDoc($filename) {

    $dom= new DOMDocument;

    $xmldata = file_get_contents($filename);

    $xmldata = str_replace("&", "&amp;", $xmldata);  // disguise &s going IN to loadXML()

    $dom->substituteEntities = true;  // collapse &s going OUT to transformToXML()

    $dom->loadXML($xmldata);

    return $dom;

}



// Compare with  Example #1 Transforming to a string



// Load the XML sources

$xml = fileToDOMDoc('collection.xml');

$xsl = fileToDOMDoc('collection.xsl');



// Configure the transformer

$proc = new XSLTProcessor;

$proc->importStyleSheet($xsl); 



// transform $xml according to the stylesheet $xsl

echo $proc->transformToXML($xml); // transform the data

?>
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