We will be primarily using CouchDB, a database that connects via HTTP GET and POST requests and stores data as JSON, two concepts that we've been using throughout the class. To get started sign up for a free account on Cloudant.
We may also discuss MySQL database as it is quite common and works nicely with PHP.
Create a website that takes information from your user and displays it (or part of it) to all users. You can use WebSockets, Ajax or server routes to collect information and optionally store that user information in a database.