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<?php
/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
/**
* XML_Parser
*
* XML Parser's Simple parser class
*
* PHP versions 4 and 5
*
* LICENSE:
*
* Copyright (c) 2002-2008 The PHP Group
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* @category XML
* @package XML_Parser
* @author Stephan Schmidt <schst@php.net>
* @copyright 2004-2008 Stephan Schmidt <schst@php.net>
* @license http://opensource.org/licenses/bsd-license New BSD License
* @version CVS: $Id$
* @link http://pear.php.net/package/XML_Parser
*/
/**
* 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.net>
* @copyright 2004-2008 The PHP Group
* @license http://opensource.org/licenses/bsd-license New BSD License
* @version Release: @package_version@
* @link http://pear.php.net/package/XML_Parser
*/
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 $tgtenc a valid target encoding
*/
function __construct($srcenc = null, $mode = 'event', $tgtenc = null)
{
parent::__construct($srcenc, $mode, $tgtenc);
}
/**
* inits the handlers
*
* @return mixed
* @access private
*/
function _initHandlers()
{
if (!is_object($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
*
* @param resource $xp xml parser resource
* @param string $elem element name
* @param array &$attribs attributes
*
* @return mixed
* @access private
* @final
*/
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
*
* @param resource $xp xml parser resource
* @param string $elem element name
*
* @return mixed
* @access private
* @final
*/
function endHandler($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
*
* @param resource $xp xml parser resource
* @param string $data data
*
* @return void
* @access private
* @final
*/
function cdataHandler($xp, $data)
{
$this->_data[$this->_depth] .= $data;
}
/**
* handle a tag
*
* Implement this in your parser
*
* @param string $name element name
* @param array $attribs attributes
* @param string $data character data
*
* @return void
* @access public
* @abstract
*/
function handleElement($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.
*
* @param string $data data to add
*
* @return void
* @access public
*/
function addToData($data)
{
$this->_data[$this->_depth] .= $data;
}
}
?>
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