The purpose of this thesis was to tell about planning and programming a reservation system for Pori Kaupunkikeskusta Ry. The system was designed to bring a new management tool for customer database, sales region and outlets, as well as reservation maintenance. The thesis mainly describes how the PHP software framework called Laravel operates. But also tells a bit about planning and creating a database and application around it, as well as software engineering in theory and in use of a real project. The practical section starts with software engineering in use. Then continues with database planning and constructing. And lastly about building the software itself step- by-step. The application was built to be a very basic maintaining system for customer register, reservations, sales areas and their outlets. Further development for the application was stopped due to co-operation cancelling out.