in reply to database query matching
In your particular situation, the best idea may be to use
some sort of relational database (MySQL, mSQL, or any
non-free ones if you can afford them...). At the best,
you'd be re-inventing the wheel doing it yourself. In
addition to structuring the flatfile database, you'd have
to also do things such as index those 3 fields for fast
lookups and efficient sorts.. Basically, doing things that
the authors of databases have spent much time optimizing.
If you are able to install software on the server, and/or
can get someone to do it for you, MySQL is the best free
way to go. If you are restricted to using flat-file
databases, you'll probably want to do something like just
a comma or tab delimited file, but a good amount of time
will be spent making your searching methods efficient.