In this thesis, we have presented the Symfony framework for the PHP programming language. Symfony consists of a set of PHP components that offer solutions for quick and easy web application development. In the first chapter, we have listed the installation requirements and the method of installing Symfony. Following the terms related to the MVC software architectural pattern, we explain the role of the basic route and controller components, the way these components are added to the project and their use in applications. We have demonstrated the solution that Symfony offers for mapping database data to objects using the Doctrine library and all the advantages of its own Twig template engine for building user interfaces. Finally, we have described a security component that offers easy integration of ready-made solutions for the authentication and authorization process. In the second chapter, we described the approach to creating the web application Gažer, which demonstrates important components of Symfony, but also provides insight into some advanced features. Firstly, we described the motivation for creating the application, followed by the presentation of the solutions to the problems that the development brought. We then described the routes and associated controllers used to achieve the application’s features and provided insight into the creation of notifications. In the end of the chapter, we explained how the security aspects of the application are implemented and we showed an easy way to edit the user interface using the built-in theme of the Bootstrap library.