first use of classes, xml parse

<?php
//alternative solution to this method was to use functions with globals variables!
 
//define the class reference
class rss_parser {    
 
   //decare variables to be used inside class
   var $insideitem = false;    
   var $tag = "";    
   var $title = "";    
   var $description = "";    
   var $link = "";
   var $tags = "";
 
 
   //functions to make our class do something!
   function start_tag($parser, $tagName, $attrs) {    
       if ($this->insideitem) {    
           $this->tag = $tagName;    
       } elseif ($tagName == "DATACONTENT") {    
           $this->insideitem = true;    
       }
       $this->tags .= "<br />".$tagName;
   }    
 
   function end_tag($parser, $tagName) {    
       if ($tagName == "DATACONTENT") {
            //output a formatted string with placeholders!
           printf("<h1>%s</h1>", htmlspecialchars(trim($this->title)));    
           echo  ($this->description);
 
           //empty vars
           $this->title = "";    
           $this->description = "";    
           $this->link = "";    
           $this->insideitem = false;    
       }    
   }    
 
   function tag_data($parser, $data) {    
       if ($this->insideitem) {    
           switch ($this->tag) {    
               case "HL1":    
               $this->title .= $data;    
               break;    
               case "P":
               $this->description .= "<p>".$data."</p>";
               break;
                case "A":
               $this->description .= "<a href=''>".$data."</a>";
               break;
           }    
       }    
   }    
}    
 
//create xml parser   
$xml_parser = xml_parser_create();
 
//create the class object
$rss_parser = new rss_parser();
 
//This function allows to use parser inside object
xml_set_object($xml_parser, &$rss_parser);
 
xml_set_element_handler($xml_parser, "start_tag", "end_tag");    
xml_set_character_data_handler($xml_parser, "tag_data");
 
//open xml file
$fp = fopen("news_sample.xml","r") or die("Error reading XML data.");
 
//read 4kb of the file at a time
while ($data = fread($fp, 32096)){    
    xml_parse($xml_parser, $data, feof($fp)) or die(sprintf("XML error: %s at line %d",    
    xml_error_string(xml_get_error_code($xml_parser)),    
    xml_get_current_line_number($xml_parser)));
}
 
//close file and delete parser
fclose($fp);    
xml_parser_free($xml_parser);
 
//echo $rss_parser->tags;
?>