Posted by Chung Leong on 01/04/06 03:59

Full Decent wrote:
> I like this idea and the possibility of running "DB queries" against a
> real DB, the filesystem, or the network. Do you know of existing
> classes that provide this level of abstraction beyond ADODB?

It's just a matter of separating the concerns of your code. Doesn't
really require special logic. For example, say you need to retrieve a
article from the database, instead of running the query in the
application code itself, call a function to do it:

$message = GetMessageById($id);

or

$message = GetMessageByTitle($title);

or

$messages = GetMessagesByDate($start, $end);

If you want to get fancy, use a class factory

$messages = $message_factory->Load($criteria, $offset, $length);

There are many ways to do this. The bottomline is to isolate the data
save/retrieval code, so that you can swap in a different mechanism by
simply including a different file.

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