Make an Online Database. This Database needs to be on an actual, viewable webpage.
Example:
Jhonny is hosting a Team Deathmatch and wants to send stats on Billy to the Online Database. That is what I'd like to see from you.
You should first, learn what you need to. Secondly, start brainstorming on designing a nice system. From there you'll write the actual code (writing the code should take the least amount of time in this process).
Remember, if you have any questions, we over in the Coding Help section we'll be glad to answer them.