build small php7 website example

LOGIN REGISTER SIGN UP INSERT MONEY TO THE USER 500 CREDITS they open the simple page of the home screen where they see a market style system they are then able to buy and sell 3 types of items that i want the ability to rename in the database item item item then beside the items there is a button to buy or sell after inputting the amount i want to be able to change cost freely threw the database so it stays fun a bank they can insert money into with again input forms but the bank will run a cron job for every hour the bank ads 3% interest to each players total credit balance in the bank. this is all i want done for now this is a visual test to see if i want to continue but i want it finished today it's 9:41am and this is not a hard or expensive request for a seasoned developer. I want this code to use php7 OOP and pdo