I have extensive experience utilizing Flash with an ASP scripting backend (database/file backend with a cool Flash front end),and since I have started leaning towards PHP for all my web programming, it shouldn't be that different.
Check out www.oyezoyez.org or www.idealog.org. Both are examples of what I did.
I have one question: Are you trying to CREATE Flash graphics (SWFs) or are you trying to get information into Flash from another source (file, database, etc...)?
Email me if you want!