iTunes XML Parser Class

<?
//
// iTunes XML Playlist Parser Class
// Mike Pacific
// [email protected]
// http://www.deskmod.com
//
//
// How to Use:
// First, activate the parser by calling the initial function (ie. $playlist_parser->parser($playlist_file); where $playlist_file
// is the path to your xml file. After this, the information is ready. First off, the playlist title is stored in a variable 
// called $playlist_title (ie. $playlist_parser->playlist_title). There is also an array called $playlist which is structured as follows:
// $playlist[artist name][increment counter][album/title/genre/time]
// if you have any questions, please e-mail me
//
class playlist_parser
{	var $xml_parser;
	var $xml_current;
	var $xml_key;
	var $xml_cursong;
	var $xml_curartist;
	var $title_key;
	var $counter=1;
	var $playlist_title;
	var $playlist=array();
	function xml_start($xml_parser,$xml_tag,$xml_attributes)
	{	$this->xml_current.="/~".$xml_tag;
	}
	function xml_end($xml_parser,$xml_tag)
	{	$xml_caret_pos=strrpos($this->xml_current,"/~");
		$this->xml_current=substr($this->xml_current,0,$xml_caret_pos);
	}
	function xml_data($xml_parser,$xml_data)
	{	if($this->xml_current=="/~PLIST/~DICT/~DICT/~DICT/~KEY"&&$xml_data=="Track ID")
		{	$this->counter++;
		}
		switch($this->xml_current)
		{	case"/~PLIST/~DICT/~DICT/~DICT/~KEY":
				$this->xml_key=$xml_data;
				break;
			case"/~PLIST/~DICT/~DICT/~DICT/~STRING":
				switch($this->xml_key)
				{	case"Name":
						$this->xml_cursong=$xml_data;
						break;
					case"Artist":
						$this->playlist[$xml_data][$this->counter]['song']=$this->xml_cursong;
						$this->xml_curartist=$xml_data;
						break;
					case"Album":
						$this->playlist[$this->xml_curartist][$this->counter]['album']=$xml_data;
						break;
					case"Genre":
						$this->playlist[$this->xml_curartist][$this->counter]['genre']=$xml_data;
						break;
					default:
						break;
				}
				break;
			case"/~PLIST/~DICT/~DICT/~DICT/~INTEGER":
				switch($this->xml_key)
				{	case"Total Time":
						$this->playlist[$this->xml_curartist][$this->counter]['time']=$xml_data;
						break;
				}
				break;
			case"/~PLIST/~DICT/~ARRAY/~DICT/~KEY":
				$this->title_key=$xml_data;
				break;
			case"/~PLIST/~DICT/~ARRAY/~DICT/~STRING":
				switch($this->title_key)
				{	case"Name":
						if(!$this->playlist_title)
						{	$this->playlist_title=$xml_data;
						}
						break;
					default:
						break;
				}
				break;
			default:
				break;
		}
	}
	function parser($playlist_file)
	{	$this->xml_parser=xml_parser_create();
		xml_set_object($this->xml_parser,&$this);
		xml_set_element_handler($this->xml_parser,"xml_start","xml_end");
		xml_set_character_data_handler($this->xml_parser,"xml_data");
		$xml_file=fopen($playlist_file,"r");
		while($xml_data=fread($xml_file,4096))
		{	xml_parse($this->xml_parser,$xml_data,feof($xml_file));
		}
		ksort($this->playlist);
	}
}
?>