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xslt_set_sax_handlers

Set the SAX handlers to be called when the XML document gets processed (PHP 4 >= 4.0.6)
void xslt_set_sax_handlers ( resource processor, array handlers )

xslt_set_sax_handlers() registers the SAX handlers for the document, given a XSLT processor resource.

Using xslt_set_sax_handlers() doesn't look very different than running a SAX parser like xml_parse() on the result of an xslt_process() transformation.

Parameters

processor

The XSLT processor link identifier, created with xslt_create().

handlers

handlers should be an array in the following format:

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<?php

$handlers = array(

 "document" => array(
   "start_doc",
   "end_doc"),

 "element"  => array(
   "start_element",
   "end_element"),

 "namespace" => array(
   "start_namespace",
   "end_namespace"),

 "comment"   => "comment",

 "pi"        => "pi",

 "character" => "characters"

);
?>

Where the functions follow the syntax described for the scheme handler functions.

Note:

The given array does not need to contain all of the different sax handler elements (although it can), but it only needs to conform to "handler" => "function" format described above.

Each of the individual SAX handler functions are in the format below:

Return Values

No value is returned.

Examples

Example 2668. xslt_set_sax_handlers() Example

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<?php
// From ohlesbeauxjours at yahoo dot fr
// Here's a simple example that applies strtoupper() on
// the content of every <auteur> tag and then displays the
// resulting XML tree:

$xml='<?xml version="1.0"?>
<books>
<book>
 <title>Mme Bovary</title>
 <author>Gustave Flaubert</author>
</book>
<book>
 <title>Mrs Dalloway</title>
 <author>Virginia Woolf</author>
</book>
</books>';

$xsl='<?xml version="1.0"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output method="html" encoding="ISO-8859-1" indent="no" omit-xml-declaration="yes"/>
<xsl:template match="/">
<xsl:for-each select="books/book">
 <livre>
  <auteur><xsl:value-of select="author/text()"/></auteur>
 </livre>
</xsl:for-each>
</xsl:template>
</xsl:stylesheet>';

// Handlers :
function start_document()
{
 // start reading the document
}

function end_document()
{
 // end reading the document
}

function start_element($parser, $name, $attributes)
{
 global $result,$tag;
 $result .= "<". $name . ">";
 $tag = $name;
}

function end_element($parser, $name)
{
 global $result;
 $result .= "</" . $name . ">";
}

function characters($parser, $data)
{
 global $result,$tag;
 if ($tag == "auteur" ) {
   $data = strtoupper($data);
 }
 $result .= $data;
}

// Transformation :
$xh = xslt_create();
$handlers = array("document" => array("start_document","end_document"),
  "element" => array("start_element","end_element"),
  "character" => "characters");

xslt_set_sax_handlers($xh, $handlers);
xslt_process($xh, 'arg:/_xml', 'arg:/_xsl', NULL, array("/_xml"=>$xml, "/_xsl"=>$xsl));
xslt_free($xh);
?>


You can also use xslt_set_object() if you want to implement your handlers in an object.

Example 2669. Object oriented handler

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<?php
// This is the object oriented version of the previous example
class data_sax_handler {

 var $buffer, $tag, $attrs;

 var $_xh;

 function data_sax_handler($xml, $xsl)
 {
     // our xslt resource
     $this->_xh = xslt_create();

     xslt_set_object($this->_xs, $this);

     // configure sax handlers
     $handlers = array(
       "document" => array('start_document', 'end_document'),
       "element" => array('start_element', 'end_element'),
       "character" => 'characters'
     );

     xslt_set_sax_handlers($this->_xh, $handlers);

     xslt_process($this->_xh, 'arg:/_xml', 'arg:/_xsl', NULL, array("/_xml"=>$xml, "/_xsl"=>$xsl));
     xslt_free($this->_xh);


 }

 function start_document()
 {
       // start reading the document
 }

 function end_document() {
       // complete reading the document
 }

 function start_element($parser, $name, $attributes) {
       $this->tag = $name;
       $this->buffer .= "<" . $name . ">";
       $this->attrs = $attributes;
 }

 function end_element($parser, $name)
 {
       $this->tag = '';
       $this->buffer .= "</" . $name . ">";
 }

 function characters($parser, $data)
 {
   if ($this->tag == 'auteur') {
         $data = strtoupper($data);
   }
   $this->buffer .= $data;
 }

 function get_buffer() {
   return $this->buffer;
 }

}

$exec = new data_sax_handler($xml, $xsl);

?>

Both examples will output:

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<livre>
  <auteur>GUSTAVE FLAUBERT</auteur>
</livre>
<livre>
  <auteur>VIRGINIA WOOLF</auteur>
</livre>



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