XSL Transformation With PHP And Sablotron - Mistakes Happen

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Like any good API, PHP's Sablotron extension comes with an excellent error-handling mechanism. I'll modify one of the examples above to illustrate:

<?php









// the files

$xmlfile = "person.xml";

$xslfile = "person.xsl";









// create the XSLT processor

$xslthandler = xslt_create() or die("Houston, we 

have a problem. No XSLT

handler available. Mission aborted.");









 // process the two files to get the desired output

 if(xslt_run($xslthandler, 

$xslfile, $xmlfile))

 {

 // get and print the result

 echo xslt_fetch_result($xslthandler);

 }

 else

 {

 // 

error

 echo "Something bad just happened.n";

 echo "Error code: " . xslt_errno($xslthandler) 

. "n";

 echo "Error string: " . xslt_error($xslthandler) . "n";

 exit;

 }









// free the resources occupied by the handlers

xslt_free($xslthandler);









?>

Much of the code here has been culled from the previous examples. The difference: this script includes a primitive error-handling mechanism, which checks whether or not the processing was successful, and returns an error code and message if not.

Both the xslt_errno() and xslt_error() functions accept a handle for the XSLT processor, and return the last error code and message generated by the processor. At least that's the theory - in my experiments with PHP 4.0.6, these functions failed to work as advertised.

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