On the Nelm.io blog today there's a new post (part one of a series) about using Composer and Packagist to manage PHP applications as packages.

You may have heard about Composer and Packagist lately. In short, Composer is a new package manager for PHP libraries. Quite a few people have been complaining about the lack of information, or just seemed confused as to what it was, or why the hell we would do such a thing. This is my attempt at clarifying things.

The briefly explains what the tool(s) do and shows how to set up the configuration on both sides - Composer to manage the packages and the package definition configurations (including meta about the project and any dependencies). He also answers several "why" questions about the need for a package manager, using this versus PEAR, the choice of JSON for config definition and a current status of the project.