In order to run the project, you'll need PHP, a webserver and a MySQL database server. A decent knowledge of JavaScript is also necessary if you want to customize the project.
If you are a complete beginner, I recommend going through some tutorials and getting some experience before you dig into the code. The tutorial assumes that you are already familiar with the technologies used there.
https://www.google.com/search?q=php+tutorial+for+beginners
https://www.google.com/search?q=javascript+tutorial+for+beginners