How to referene perticuler xml data in php?

Hi all. i have an xml file as shown below and i want to reference specific data out it.(The data shown in bold)Could any one show me how to reference those data so i can use them later as variables.I not only want to output them all at once.I also want to learn how to reference individual items separately because i have another part that uses those 3 variables(Artistname,songname,songimage).i be happy if some show me how this can be done in php.Thanks

xml file(rss feed with one set of data always):

[code]
<playing>
<artist>[b]Cindy[/b]</artist>
<song>[b]echo[/b]</song>
<image>[b]http://www.somesite.com/song_images/cindy.jpg[/b]</image>
<rating>3.5</rating>
<songid>4736</songid>
</playing>

[/code]

php code that uses retrevied data:

[code]
<?
$imageurl = “http://www.somesite.com/song_images/cindy.jpg”;
$artist = “cindy”;
$song = “echo”;
…..
…..

?>
[/code]

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