Renamed myprofile.html to user.php. Created users_helper.php with fetch_user_by_id function stub.
Added joke users. Changed include links to include once at the top of user.php.
Implemented fetch_user_by_id and pluralize functions. Changed param to id instead of user_id.
Created helper functions for products.
Extracted listing of products to a partial which uses a  variable. Used when displaying products in products.php and user.php