This page lists feedback entries tagged with programming sorted on creation date
After having a look at the code, I think it would be better if all database operations were stored in a class.
The class Db exists, but, outside this class, there are calls to mysql_* functions. This is a problem for porting phpMyVisites to other DBMS.
I may help doing this if you want.
p.s : I could not find any matching category for this post, so I put it here.