The SitePoint PHP blog continues their series creating a simple application based on the 500px service with part two, commenting, upvoting and uploading photos. The 500px service is a photo community for discovering, sharing, buying and selling inspiring photography powered by creative people worldwide.

In the first part of this series we used the API to get the latest photos from 500px and filter through them, and we built a user profile with the list of associated photos. In this part, we are going to give the user the ability to vote, favorite and comment on photos, and finally, we will give the users the ability to upload their own photos.

They start with a look at authentication and authorization handling to make the OAuth-based request to the 500px API. Code is included for the connecting class, including the addition of a logger to make debugging the requests simpler. From there they set up the routes for handling votes on photos (PHP and Javascript) and marking favorite photos. They also include the functionality for adding comments, getting the latest comments and uploading new photos to the service. The final resulting code can be found over on GitHub.