In web application development, we mainly focus and plan our business logic. Throughout the first ten chapters of this book, we developed features that are directly related to the portfolio management application. However, there are supplementary features that are not related to the business requirements of the application, and yet play a vital part in the success of a project.

Multi-language support, caching, and security are important features of any web application. WordPress provides built-in features to support these type of non-application-related tasks. Apart from this, WordPress also offers some features that can be used to improve the flexibility and user experience of applications. Throughout this chapter, we will give a brief introduction to these supplementary modules so that you can use them when the opportunity arises.

In this chapter, we will cover the following topics: