how to pagify genre search result on the movie database

I have a website that I'm building on my localhost using the MVC design pattern. I have button on click that will display all the genres in TheMovieDatabase which I got using the TheMovieDatabaseAPI. On click of a genre I get data for Page 1 with 20 results. But, I couldn't figure out how to request the results for page 2. These requests are made using PHP.