PHP Please.

Create a new project with your name in the project name (eg. smith asst1). In this project, code index.php and checkout.php as below.

index.php

• displays a web form for processing a retail transaction. Your form should show the same textboxes.
• validates each textbox entry and displays error messages as appropriate.
• executes checkout.php when the form is submitted.

checkout.php

• reads form data safely into variables with filter_input() function.
• validates the price and quantity inputs, displaying error messages if needed.
• computes the subtotal, 7% sales tax, and total for the transaction.
• displays a record of the transaction including the date.
• displays calculations in currency format, guarding against XSS attacks where needed.