Composer has changed how PHP developers work with external libraries and packages in even just the small amount of time its been around. One of the keys to its use, though, is getting your code listed on the Packagist site for easy requesting. In this new tutorial on PHPMaster.com, they walk you through doing just that.
You’ve created an awesome library, and now you’re ready to open source it and share it with the world. Hopefully someone else can benefit from your work, and maybe you’ll even receive a bug report or patch to make the library even better. But none of that can happen unless people can find it… and the modern way is increasingly becoming through Composer and Packagist. In this article I’ll show you what information is needed in your composer.json file and how to list your library on Packagist so others can easily find it.
He talks some about the "composer.json" file for your project and talks some about the content that has to be there for Packagist to be able to pick it up correctly. He then shows you how to go over to the Packagist website, log in and add a package to their repository. It then shows you where on Github you'll need to go to set up a Service Hook to talk back to Packagist when a new version is deployed.