Valid XHTML for SlideShare

Here is part of SlideShare 1.4 code that produces valid XHTML output:

$content = '<object style="margin:0px" width="'.$width.'" '.'height="'.$height.'" type="application/x-shockwave-flash" data="https://static.slideshare.net/swf/ssplayer2.swf?doc='.$r['doc'].'"><param name="allowFullScreen" value="true" /><param name="allowScriptAccess" value="always" /><param name="movie" value="https://static.slideshare.net/swf/ssplayer2.swf?doc='.$r['doc'].'" /></object>';