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# xslt_set_sax_handlers

(PHP 4 >= 4.0.6)

xslt_set_sax_handlers -- Set the SAX handlers to be called when the XML document gets processed

## Description

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.

handlers should be an array in the following format:

`<?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.

> 備注: 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:

- start_doc ( resource processor)

- end_doc ( resource processor)

- start_element ( resource processor, string name, array attributes)

- end_element ( resource processor, string name)

- start_namespace ( resource processor, string prefix, string uri)

- end_namespace ( resource processor, string prefix)

- comment ( resource processor, string contents)

- pi ( resource processor, string target, string contents)

- characters ( resource processor, string contents)

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.

## 範例

示範 1.xslt_set_sax_handlers() Example

`<?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.

示範 2.Object oriented handler

`<?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:

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

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