<?PHP
  class XMLParser {
    var $parser;
    var $tags;
    var $depth;
    
    function XMLParser() {
      $this->parser = xml_parser_create();
      
      xml_set_object($this->parser, $this);
      xml_parser_set_option($this->parser, XML_OPTION_CASE_FOLDING, 0);
      
      xml_set_element_handler($this->parser, 'openTagHandler', 'closeTagHandler');
      xml_set_character_data_handler($this->parser, 'cdataHandler');
    }
    
    function ParseFile($filename) {
      $this->tags = array();
      $this->depth = 0;
      
      $file = fopen($filename, 'r');
      
      while ($xml = fread($file, 4096)) {
        if(!xml_parse($this->parser, $xml, feof($file))) {
          $this->tags = null;
          break;
        }
      }
      
      fclose($file);
      
      return $this->tags[0];
    }
    
    function ParseXML($xml) {
      $this->tags = array();
      $this->depth = 0;
      
      if(!xml_parse($this->parser, $xml, true))
        $this->tags = null;
      
      return $this->tags[0];
    }
    
    function FindTag($data, $tag, $start = 0) {
      for($i = $start; $i < count($data['children']); $i++) {
        if(!is_array($data['children'][$i])) continue;
        if($data['children'][$i]['tag'] == $tag) return $data['children'][$i];
      }
    }
    
    function openTagHandler($parser, $name, $attribs) {
      $this->tags[$this->depth] = array('tag' => $name,
                                        'attribs' => $attribs,
                                        'children' => array());
      
      $this->depth++;
    }
    
    function closeTagHandler($parser, $name) {
      $this->depth--;
      
      if($this->depth > 0)
        array_push($this->tags[$this->depth-1]['children'], $this->tags[$this->depth]);
    }
    
    function cdataHandler($parser, $data) {
      $data = trim($data);
      
      if($data != '')
        array_push($this->tags[$this->depth-1]['children'], $data);
    }
  }
  
  $GLOBALS['xmlparser'] = new XMLParser;
?>