HN_htusers is a PHP class to manage users and groups in Apache Web server environments, with optional extra information for users. It uses Apache-style MD5-crypt passwords. It uses built-in CSS styles. Validation (min-max length, allowed characters) is built-in for all entries. The locking mechanism is robust. It includes examples of how to test your setup, how to embed a dynamic form for changing passwords into existing HTML code, using HTTP-Auth with .htaccess files in directories, and using HTTP-Auth without .htaccess files but with PHP.
Instagram API integration with PHP can access an Instagram user's account using its API. It can send HTTP requests to the Instagram API Web servers using the OAuth protocol to access the account of a user with his permission. The class retrieves a token which it can use to send subsequent API requests to get the user feed, the user publications, the followers and who the user follows, and the user's most popular photos.