do you want to add the information inside the csv file to your database or just add the file itself?

The initial option can get quite complicated.

If you are just wanting to include the file itself in the database your best option would be to add all uploaded csv files to a separate folder and just add the url of that file to your database.

and I just realised you are looking for PHP code to do this which I probably cant help you with but the above would still apply

There are plenty of sample scripts/tutorials that cover each of the 3 components you described, but the result you want will definitely require a custom script. The reason being only a custom script will know what format the data in the CSV file will be in so it can parse it correctly and then insert it into a MySQL table in the format that is expecting.

To upload...

PHP File Upload

You say you want to "parse" the file after that, but that can mean 100 different things, so you'll have to be more specific about what you mean by "parse".

Getting free scripts is not a good practice.
You should hire someone or try to solve your problem on your own.
That would be better.

Parsing a CSV is, in itself, not a complicated exercise in PHP. Building SQL insert statements, too, isn't complicated. Receiving a file from an HTTP POST isn't too complicated either.

But tying them all together? That's the art

I would strongly suggest you follow jaasmit's advice and either hire an experienced developer or do a lot of reading and messing around to do it yourself. Don't forget that communities like Stackoverflow will often help you much faster with specific questions around PHP development.

For the upload, I recommend Uploadify (can't post link so google it).
In the upload file, parse the CSV using any CSV class you'll find on phpclasses (again, can't link, google it).
As for inserting in a database, well... it's just an insert statement.
if you can't do that, then you'll need to learn PHP first, or outsource.

use your own script is better than the free crap
learn php and mysql it's not that hard