In this chapter, we have discussed the different optimization techniques and best practice methods to work with Apache, MariaDB, and PHP. Performance optimization is a very important concept but is probably not needed for many websites from the get-go. However, it is always necessary to keep an eye open and be ready to optimize the system when required. Application downtime and page load time are very important for the successful working and progress of a website, and performance optimization will help avoid application downtime and fasten the page load.

We have covered a variety of topics beginning with the basics of MariaDB and programming with PHP to advanced topics such as caching, security, and performance optimization. Web application development is a journey and not a destination, and this book will help us lay a strong foundation for building a robust web application.