good design?

[Ravee Bhat]

Hi all,
I have a php script which reads a XHTML document using the XML parser.
http://cgi-bin.spaceports.com/~ravee/galleria.php?Manali
Basically it parses the XML document depending on the request, to fetch certain text and display an image. viz. load the parser, parse document, close the parser. Everytime a request comes this routine is repeated.
Is this a good design? What I mean is, is it possible to load the parser once, and parse the XML document as and when the request comes?