XML parsing using PHP

Hi,
i’m using this great tutorial to view an xml using php http://www.kirupa.com/web/xml_php_parse_intermediate.htm

however in my xml file i have somehting like this:

<content Name="Press Releases">
    <article Thumb="press/vanityfair.jpg">
        <headline>Vanity Fair </headline>
        <date>March 2010</date>
        <copy_intro><![CDATA[<a href="http://www.ghadahparis.com/press/vanity.pdf" target="_blank">Download as PDF</a>]]></copy_intro>
        </article>
</content>

i want to retrieve the attribute of the article tag “thumb”, where should i put the [FONT=Verdana, Arial, Helvetica, sans-serif][SIZE=2]getAttributeNode() in the above code for this work?
i’ve tried this:
[/SIZE][/FONT]

$story_array[$counter]->thumb->[FONT=Verdana, Arial, Helvetica, sans-serif][SIZE=2]getAttributeNode('Thumb')[/SIZE][/FONT] = $data;

but didn’t work

thanks for the help