<?php
/*
XSLTranformer -- Class to transform XML files using
XSL with the Sablotron libraries.Justin Grant (2000-07-30)
Thanks to Bill Humphries for the original examples on
using the Sablotron module.
*/
/* test */
/*
$transformer = new XSLTransformer();
if ($transform->setXsl("http://www.someurl.com/document.xsl") &&
$transform->setXml("http://www.someurl.com/document.xml")) {
$transformer->transform();
echo $transformer->getOutput();
} else {
echo $transformer->getError();
}
*/
class XSLTransformer {
var $xsl, $xml, $output, $error ;
/* Constructor */
function XSLTransformer() {
$this->processor = xslt_create_processor();
}
/* Destructor */
function destroy() {
xslt_destroy_processor($this->processor);
}
/* output methods */
function setOutput($string) {
$this->output = $string;
}
function getOutput() {
return $this->output;
}
/* set methods */
function setXml($uri) {
if($doc = new docReader($uri)) {
$this->xml = $doc->getString();
return true;
} else {
$this->setError("Could not open $xml");
return false;
}
}
function setXsl($uri) {
if($doc = new docReader($uri)) {
$this->xsl = $doc->getString();
return true;
} else {
$this->setError("Could not open $uri");
return false;
}
}
/* transform method */
function transform() {
$this->setOutput(
xslt_process_strings($this->processor,
$this->xsl, $this->xml, &$err));
$this->setError($err);
}
/* Error Handling */
function setError($string) {
$this->error = $string;
}
function getError() {
return $this->error;
}
}
/* docReader -- read a file or URL as a string */
/* test */
/*
$docUri = new docReader('http://www.someurl.com/doc.html');
echo $docUri->getString();
*/
class docReader {
var $string; // public string representation of file
var $type; // private URI type: 'file','url'
var $bignum = 1000000;
/* public constructor */
function docReader($uri) { // returns integer $this->setUri($uri);
$this->setType();
$fp = fopen($this->getUri(),"r");
if($fp) { // get length
if ($this->getType() == 'file') {
$length = filesize($this->getUri());
} else {
$length = $this->bignum;
}
$this->setString(fread($fp,$length));
return 1;
} else {
return 0;
}
}
/* determine if a URI is a filename or URL */
function isFile($uri) { // returns boolean
if (strstr($uri,'http://') == $uri) {
return false;
} else {
return true;
}
}
/* set and get methods */
function setUri($string) {
$this->uri = $string;
}
function getUri() {
return $this->uri;
}
function setString($string) {
$this->string = $string;
}
function getString() {
return $this->string;
}
function setType() {
if ($this->isFile($this->uri)) {
$this->type = 'file';
} else {
$this->type = 'url';
}
}
function getType() {
return $this->type;
}
}
?>
The class definition for XSLTransformer is a little more involved but not much,
most PHP’ers should be able to gain a good understanding of how to use Sablotron’s
power from PHP by going over this code carefully.
most PHP’ers should be able to gain a good understanding of how to use Sablotron’s
power from PHP by going over this code carefully.
In case you were wondering, there actually are two classes defined in this
file. The first is XSLTansformer ofcourse and the second is docReader. docReader
allows me to read a document from a URL or a file.
file. The first is XSLTansformer ofcourse and the second is docReader. docReader
allows me to read a document from a URL or a file.
The methods meant for public use in the XSLTransformer class can be briefly
explained as follows:
explained as follows:
XSLTransformer()
This is the PHP constructor and creates an instance of the Sablotron processor
when an instance of itself is created.
when an instance of itself is created.
destroy()
This is the method to call when finished using the processor. It destroys the
current instance of the Sablotron processor being used.
current instance of the Sablotron processor being used.
getOutput()
Returns the result of a transform.
setXML() and setXSL()
Allows you to load the XML and XSL from a file or URL. If an error occurs they
set the class error property.
set the class error property.
transform()
Performs the transform on the XML document. Sets the error property if an
error occurs.
error occurs.
getError()
Returns in error that may have occured during loading of a document or performing
a transform.
a transform.
The other methods are used by the class internally and cannot be encapsulated
because PHP4 does not support this yet.
because PHP4 does not support this yet.
