Releasing open-source libraries involves much more than sharing your Github URL with the world. There are many considerations and steps involved, especially if you want your project to be successful and long-lived. In this talk, we'll cover the principles behind creating, releasing, and maintaining high-quality libraries. Topics will include structuring the repository, implementing modern PHP standards, maintaining changelogs, using CI tests, releasing new versions, and other best practices. Attendees will walk away with enough knowledge to publish their own quality PHP packages on Packagist for others to use.