Prefer xml or mysql with php

im building a flash site for a friend… he is a photographer… so it is just a fairly small portfolio of work… he needs some sort of content management… I was thinking of just using xml because Flash can load xml as objects and go from there…

the only thing is that i need to build a admin side of the site… where he can update things from a web page and not have to edit the raw xml file…

using php and mysql is much easier to store data but xml with flash seems easier for Flash… so im thinking ill go with php and xml… what do you all use for this type of situation??

if you do use php and xml for a admin site… are there any good resources available for parsing/writing XML with PHP that you know of…