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297
includes/pear/XML/Parser/Simple.php
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297
includes/pear/XML/Parser/Simple.php
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<?php
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//
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// +----------------------------------------------------------------------+
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// | PHP Version 4 |
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// +----------------------------------------------------------------------+
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// | Copyright (c) 1997-2004 The PHP Group |
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// +----------------------------------------------------------------------+
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// | This source file is subject to version 3.0 of the PHP license, |
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// | that is bundled with this package in the file LICENSE, and is |
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// | available at through the world-wide-web at |
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// | http://www.php.net/license/3_0.txt. |
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// | If you did not receive a copy of the PHP license and are unable to |
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// | obtain it through the world-wide-web, please send a note to |
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// | license@php.net so we can mail you a copy immediately. |
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// +----------------------------------------------------------------------+
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// | Author: Stephan Schmidt <schst@php-tools.net> |
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// +----------------------------------------------------------------------+
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//
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// $Id: Simple.php,v 1.6 2005/03/25 17:13:10 schst Exp $
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/**
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* Simple XML parser class.
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*
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* This class is a simplified version of XML_Parser.
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* In most XML applications the real action is executed,
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* when a closing tag is found.
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*
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* XML_Parser_Simple allows you to just implement one callback
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* for each tag that will receive the tag with its attributes
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* and CData
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*
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* @category XML
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* @package XML_Parser
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* @author Stephan Schmidt <schst@php-tools.net>
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*/
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/**
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* built on XML_Parser
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*/
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require_once 'XML/Parser.php';
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/**
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* Simple XML parser class.
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*
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* This class is a simplified version of XML_Parser.
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* In most XML applications the real action is executed,
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* when a closing tag is found.
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*
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* XML_Parser_Simple allows you to just implement one callback
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* for each tag that will receive the tag with its attributes
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* and CData.
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*
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* <code>
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* require_once '../Parser/Simple.php';
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*
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* class myParser extends XML_Parser_Simple
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* {
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* function myParser()
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* {
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* $this->XML_Parser_Simple();
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* }
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*
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* function handleElement($name, $attribs, $data)
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* {
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* printf('handle %s<br>', $name);
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* }
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* }
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*
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* $p = &new myParser();
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*
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* $result = $p->setInputFile('myDoc.xml');
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* $result = $p->parse();
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* </code>
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*
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* @category XML
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* @package XML_Parser
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* @author Stephan Schmidt <schst@php-tools.net>
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*/
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class XML_Parser_Simple extends XML_Parser
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{
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/**
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* element stack
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*
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* @access private
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* @var array
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*/
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var $_elStack = array();
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/**
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* all character data
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*
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* @access private
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* @var array
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*/
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var $_data = array();
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/**
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* element depth
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*
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* @access private
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* @var integer
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*/
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var $_depth = 0;
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/**
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* Mapping from expat handler function to class method.
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*
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* @var array
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*/
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var $handler = array(
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'default_handler' => 'defaultHandler',
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'processing_instruction_handler' => 'piHandler',
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'unparsed_entity_decl_handler' => 'unparsedHandler',
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'notation_decl_handler' => 'notationHandler',
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'external_entity_ref_handler' => 'entityrefHandler'
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);
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/**
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* Creates an XML parser.
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*
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* This is needed for PHP4 compatibility, it will
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* call the constructor, when a new instance is created.
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*
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* @param string $srcenc source charset encoding, use NULL (default) to use
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* whatever the document specifies
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* @param string $mode how this parser object should work, "event" for
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* handleElement(), "func" to have it call functions
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* named after elements (handleElement_$name())
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* @param string $tgenc a valid target encoding
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*/
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function XML_Parser_Simple($srcenc = null, $mode = 'event', $tgtenc = null)
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{
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$this->XML_Parser($srcenc, $mode, $tgtenc);
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}
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/**
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* inits the handlers
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*
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* @access private
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*/
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function _initHandlers()
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{
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if (!is_object($this->_handlerObj)) {
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$this->_handlerObj = &$this;
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}
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if ($this->mode != 'func' && $this->mode != 'event') {
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return $this->raiseError('Unsupported mode given', XML_PARSER_ERROR_UNSUPPORTED_MODE);
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}
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xml_set_object($this->parser, $this->_handlerObj);
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xml_set_element_handler($this->parser, array(&$this, 'startHandler'), array(&$this, 'endHandler'));
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xml_set_character_data_handler($this->parser, array(&$this, 'cdataHandler'));
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/**
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* set additional handlers for character data, entities, etc.
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*/
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foreach ($this->handler as $xml_func => $method) {
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if (method_exists($this->_handlerObj, $method)) {
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$xml_func = 'xml_set_' . $xml_func;
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$xml_func($this->parser, $method);
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}
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}
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}
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/**
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* Reset the parser.
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*
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* This allows you to use one parser instance
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* to parse multiple XML documents.
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*
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* @access public
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* @return boolean|object true on success, PEAR_Error otherwise
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*/
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function reset()
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{
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$this->_elStack = array();
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$this->_data = array();
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$this->_depth = 0;
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$result = $this->_create();
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if ($this->isError( $result )) {
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return $result;
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}
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return true;
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}
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/**
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* start handler
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*
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* Pushes attributes and tagname onto a stack
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*
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* @access private
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* @final
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* @param resource xml parser resource
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* @param string element name
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* @param array attributes
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*/
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function startHandler($xp, $elem, &$attribs)
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{
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array_push($this->_elStack, array(
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'name' => $elem,
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'attribs' => $attribs
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)
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);
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$this->_depth++;
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$this->_data[$this->_depth] = '';
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}
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/**
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* end handler
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*
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* Pulls attributes and tagname from a stack
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*
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* @access private
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* @final
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* @param resource xml parser resource
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* @param string element name
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*/
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function endHandler($xp, $elem)
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{
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$el = array_pop($this->_elStack);
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$data = $this->_data[$this->_depth];
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$this->_depth--;
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switch ($this->mode) {
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case 'event':
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$this->_handlerObj->handleElement($el['name'], $el['attribs'], $data);
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break;
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case 'func':
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$func = 'handleElement_' . $elem;
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if (strchr($func, '.')) {
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$func = str_replace('.', '_', $func);
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}
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if (method_exists($this->_handlerObj, $func)) {
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call_user_func(array(&$this->_handlerObj, $func), $el['name'], $el['attribs'], $data);
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}
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break;
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}
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}
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/**
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* handle character data
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*
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* @access private
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* @final
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* @param resource xml parser resource
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* @param string data
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*/
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function cdataHandler($xp, $data)
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{
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$this->_data[$this->_depth] .= $data;
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}
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/**
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* handle a tag
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*
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* Implement this in your parser
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*
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* @access public
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* @abstract
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* @param string element name
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* @param array attributes
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* @param string character data
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*/
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function handleElement($name, $attribs, $data)
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{
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}
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/**
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* get the current tag depth
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*
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* The root tag is in depth 0.
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*
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* @access public
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* @return integer
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*/
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function getCurrentDepth()
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{
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return $this->_depth;
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}
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/**
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* add some string to the current ddata.
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*
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* This is commonly needed, when a document is parsed recursively.
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*
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* @access public
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* @param string data to add
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* @return void
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*/
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function addToData( $data )
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{
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$this->_data[$this->_depth] .= $data;
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}
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}
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?>
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