We have learned a lot in this chapter about session management and storing persistent information on the server. Specifically, we saw how to design a tasklist application and implement a logon screen. What a session is and how this allows us to work with different users at the same time and how to interact with the server, and add or delete tasks. We also learned how to make entering dates attractive and simple with jQuery UI's datepicker widget and how to style button elements and provide tooltips and inline labels to input elements.
Now that you know a little bit more about storing data on the server, you might wonder if storing information in plain files on the server filesystem is the most convenient solution. In many cases, it isn't and a database might be more suitable—which is the topic of the next chapter.