DevShed is starting another new series today with part one of their look at "Building an Invoicing System" - building the login script.

In this first part of "Building an Invoicing System," we are going to look at invoice management. Why would anyone want an online invoicing system? Well, if you are a freelance web developer like myself, you will undoubtedly need to invoice your clients so as to be able to get paid at the end of the month. This application will help you to manage your client details as well as your invoices.

It's a basic level tutorial, and starts from the basics - being sure PHP and MySQL are installed and working together. They offer a few troubleshooting tips if things aren't working right before giving you the database schema and the actual (simple) script to use for logging in a user.