<?php

require_once 'PEAR.php';

class Talk {

    var $elements;

    function Talk() {
        $this->elements = array();
    }
    
    function set($name, $value) {
        $this->elements[$name] = $value;
    }

    function get($name) {
        if (array_key_exists($name, $this->elements))
            return $this->elements[$name];
        else
            return PEAR::raiseError("Element $name no found");
    }

    function toString() {
        foreach ($this->elements as $key=>$value)
            printf("<i>%s</i> :: %s<br>\n", $key, $value);
    }
} // end of class Talk

class TalkParser {

    var $parser;
    var $ltag;
    var $lcontent;
    var $talk;

    function TalkParser() {
        $this->parser = xml_parser_create();
        xml_set_object($this->parser, $this);
        xml_set_element_handler($this->parser, 'start', 'end');
        xml_set_character_data_handler($this->parser, 'cdata');
        $this->ltag = $this->lcontent = '';
    }

    function parse($xml) {
        xml_parse($this->parser, $xml);
    }

    function start($parser, $name, $attrs) {
        if (strtolower($name) == 'talk') {
            $this->talk = new Talk();
        } else {
            $this->ltag = trim($name);
        }
    }

    function end($parser, $name) {
        if ($this->ltag != '') {
            $this->talk->set($name, $this->lcontent);
            $this->ltag = $this->lcontent = '';
        }
    }

    function cdata($parser, $data) {
        $this->lcontent = trim($data);
    }

    function getTalk() {
        return $this->talk;
    }
} // end of class TalkParser

$xml_file = 'presentations/slides/sdphp/data/sdphp_talk.xml';
$xmldoc = implode('', file($xml_file));

$parser = new TalkParser();
$parser->parse($xmldoc);
$talk = $parser->getTalk();

$talk->toString();

?>