On TutsPlus.com they've continued their series showing the construction of a startup (a calendaring site) using PHP and the Yii2 framework. In this latest article they walk you through their construction of a notification system when others need to be informed/invited to meetings in the system.

This tutorial is part of the Building Your Startup With PHP series on Envato Tuts+. In this series, I'm guiding you through launching a startup from concept to reality using my Meeting Planner app as a real-life example. [...] In this two-part series, I'll describe how we built the notifications infrastructure and their delivery. Today, I'm going to focus on the MeetingLog to track changes that help us determine when to send updates.

They start with their vision of how the notification system should work (starting at the UI level) and the types of responses an invited user could reply with. The article then gets into how the notifications will work and the creation of the first step: a log to track all actions taken around notifications. They include the model to work with the logging table, adding a new log message, defining the logging command and finding specific log messages. With that in place, the tutorial switches to the frontend, showing what the notifications should look like using flash messages and a few updates to the views in the application.