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<?php
//
// +----------------------------------------------------------------------+
// | PHP Version 4 |
// +----------------------------------------------------------------------+
// | Copyright (c) 1997-2004 The PHP Group |
// +----------------------------------------------------------------------+
// | This source file is subject to version 3.0 of the PHP license, |
// | that is bundled with this package in the file LICENSE, and is |
// | available at through the world-wide-web at |
// | http://www.php.net/license/3_0.txt. |
// | If you did not receive a copy of the PHP license and are unable to |
// | obtain it through the world-wide-web, please send a note to |
// | license@php.net so we can mail you a copy immediately. |
// +----------------------------------------------------------------------+
// | Author: Stephan Schmidt <schst@php-tools.net> |
// +----------------------------------------------------------------------+
//
// $Id: Simple.php,v 1.6 2005/03/25 17:13:10 schst Exp $
/**
* Simple XML parser class.
*
* This class is a simplified version of XML_Parser.
* In most XML applications the real action is executed,
* when a closing tag is found.
*
* XML_Parser_Simple allows you to just implement one callback
* for each tag that will receive the tag with its attributes
* and CData
*
* @category XML
* @package XML_Parser
* @author Stephan Schmidt <schst@php-tools.net>
*/
/**
* built on XML_Parser
*/
require_once 'XML/Parser.php';
/**
* Simple XML parser class.
*
* This class is a simplified version of XML_Parser.
* In most XML applications the real action is executed,
* when a closing tag is found.
*
* XML_Parser_Simple allows you to just implement one callback
* for each tag that will receive the tag with its attributes
* and CData.
*
* <code>
* require_once '../Parser/Simple.php';
*
* class myParser extends XML_Parser_Simple
* {
* function myParser()
* {
* $this->XML_Parser_Simple();
* }
*
* function handleElement($name, $attribs, $data)
* {
* printf('handle %s<br>', $name);
* }
* }
*
* $p = &new myParser();
*
* $result = $p->setInputFile('myDoc.xml');
* $result = $p->parse();
* </code>
*
* @category XML
* @package XML_Parser
* @author Stephan Schmidt <schst@php-tools.net>
*/
class XML_Parser_Simple extends XML_Parser
{
/**
* element stack
*
* @access private
* @var array
*/
var $_elStack = array();
/**
* all character data
*
* @access private
* @var array
*/
var $_data = array();
/**
* element depth
*
* @access private
* @var integer
*/
var $_depth = 0;
/**
* Mapping from expat handler function to class method.
*
* @var array
*/
var $handler = array(
'default_handler' => 'defaultHandler',
'processing_instruction_handler' => 'piHandler',
'unparsed_entity_decl_handler' => 'unparsedHandler',
'notation_decl_handler' => 'notationHandler',
'external_entity_ref_handler' => 'entityrefHandler'
);
/**
* Creates an XML parser.
*
* This is needed for PHP4 compatibility, it will
* call the constructor, when a new instance is created.
*
* @param string $srcenc source charset encoding, use NULL (default) to use
* whatever the document specifies
* @param string $mode how this parser object should work, "event" for
* handleElement(), "func" to have it call functions
* named after elements (handleElement_$name())
* @param string $tgenc a valid target encoding
*/
function XML_Parser_Simple($srcenc = null, $mode = 'event', $tgtenc = null)
{
$this->XML_Parser($srcenc, $mode, $tgtenc);
}
/**
* inits the handlers
*
* @access private
*/
function _initHandlers()
{
if (!is_object($this->_handlerObj)) {
$this->_handlerObj = &$this;
}
if ($this->mode != 'func' && $this->mode != 'event') {
return $this->raiseError('Unsupported mode given', XML_PARSER_ERROR_UNSUPPORTED_MODE);
}
xml_set_object($this->parser, $this->_handlerObj);
xml_set_element_handler($this->parser, array(&$this, 'startHandler'), array(&$this, 'endHandler'));
xml_set_character_data_handler($this->parser, array(&$this, 'cdataHandler'));
/**
* set additional handlers for character data, entities, etc.
*/
foreach ($this->handler as $xml_func => $method) {
if (method_exists($this->_handlerObj, $method)) {
$xml_func = 'xml_set_' . $xml_func;
$xml_func($this->parser, $method);
}
}
}
/**
* Reset the parser.
*
* This allows you to use one parser instance
* to parse multiple XML documents.
*
* @access public
* @return boolean|object true on success, PEAR_Error otherwise
*/
function reset()
{
$this->_elStack = array();
$this->_data = array();
$this->_depth = 0;
$result = $this->_create();
if ($this->isError( $result )) {
return $result;
}
return true;
}
/**
* start handler
*
* Pushes attributes and tagname onto a stack
*
* @access private
* @final
* @param resource xml parser resource
* @param string element name
* @param array attributes
*/
function startHandler($xp, $elem, &$attribs)
{
array_push($this->_elStack, array(
'name' => $elem,
'attribs' => $attribs
)
);
$this->_depth++;
$this->_data[$this->_depth] = '';
}
/**
* end handler
*
* Pulls attributes and tagname from a stack
*
* @access private
* @final
* @param resource xml parser resource
* @param string element name
*/
function endHandler($xp, $elem)
{
$el = array_pop($this->_elStack);
$data = $this->_data[$this->_depth];
$this->_depth--;
switch ($this->mode) {
case 'event':
$this->_handlerObj->handleElement($el['name'], $el['attribs'], $data);
break;
case 'func':
$func = 'handleElement_' . $elem;
if (strchr($func, '.')) {
$func = str_replace('.', '_', $func);
}
if (method_exists($this->_handlerObj, $func)) {
call_user_func(array(&$this->_handlerObj, $func), $el['name'], $el['attribs'], $data);
}
break;
}
}
/**
* handle character data
*
* @access private
* @final
* @param resource xml parser resource
* @param string data
*/
function cdataHandler($xp, $data)
{
$this->_data[$this->_depth] .= $data;
}
/**
* handle a tag
*
* Implement this in your parser
*
* @access public
* @abstract
* @param string element name
* @param array attributes
* @param string character data
*/
function handleElement($name, $attribs, $data)
{
}
/**
* get the current tag depth
*
* The root tag is in depth 0.
*
* @access public
* @return integer
*/
function getCurrentDepth()
{
return $this->_depth;
}
/**
* add some string to the current ddata.
*
* This is commonly needed, when a document is parsed recursively.
*
* @access public
* @param string data to add
* @return void
*/
function addToData( $data )
{
$this->_data[$this->_depth] .= $data;
}
}
?>
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