<?php

  // Global variables for function use.

  $GLOBALS['title'] = false;

  $GLOBALS['link']  = false;

  $GLOBALS['description'] = false;

  $GLOBALS['titletext'] = null;

  $GLOBALS['linktext'] = null;

  $GLOBALS['desctext'] = null;

  // function: startElement

  // Deals with the starting element

  function startElement( $parser, $tagName, $attrs ) {

    // By setting global variable of tag name

    // I can determine which tag I am currently

    // parsing.

    switch( $tagName ) {

      case 'TITLE':

        $GLOBALS['title'] = true;

        break;

      case 'LINK':

        $GLOBALS['link'] = true;

        break;

      case 'DESCRIPTION':

        $GLOBALS['description'] = true;

        break;

    }

  }

  // function: endElement

  // Deals with the ending element

  function endElement( $parser, $tagName ) {

    // By noticing the closing tag,

    // I can print out the data that I want.

    switch( $tagName ) {

      case 'TITLE':

        echo "<p><b>" . $GLOBALS['titletext'] . "</b><br/>";

        $GLOBALS['title'] = false;

        $GLOBALS['titletext'] = "";

        break;

      case 'LINK':

        echo "Link: <a href=\"". $GLOBALS['linktext'] . "\">" . $GLOBALS['linktext'] . "</a><br/>";

        $GLOBALS['link'] = false;

        $GLOBALS['linktext'] = "";

        break;

      case 'DESCRIPTION':

        echo "Desc: " . $GLOBALS['desctext'] . "</p>";

        $GLOBALS['description'] = false;

        $GLOBALS['desctext'] = "";

        break;

    }

  }

  // function: charElement

  // Deals with the character elements (text)

  function charElement( $parser, $text ) {

    // Verify the tag that text belongs to.

    // I set the global tag name to true

    // when I am in that tag.

    if( $GLOBALS['title'] == true ) {

        $GLOBALS['titletext'] .= htmlspecialchars( trim($text) );

    } else if( $GLOBALS['link'] == true ) {

        $GLOBALS['linktext']  .= trim( $text );

    } else if( $GLOBALS['description'] == true ) {

        $GLOBALS['desctext'] .= htmlspecialchars( trim( $text ) );

    }

  }

  // Create an xml parser

  $xmlParser = xml_parser_create();

  // Set up element handler

  xml_set_element_handler( $xmlParser, "startElement", "endElement" );

  // Set up character handler

  xml_set_character_data_handler( $xmlParser, "charElement" );

  // Open connection to RSS XML file for parsing.

  $fp = fopen( "http://news.com.com/2547-1_3-0-5.xml", "r" )

    or die( "Cannot read RSS data file." );

  // Parse XML data from RSS file.

  while( $data = fread( $fp, 4096 ) ) {

    xml_parse( $xmlParser, $data, feof( $fp ) );

  }

  // Close file open handler

  fclose( $fp );

  // Free xml parser from memory

  xml_parser_free( $xmlParser );

?>