Create a PHP file. Name the file data.php

Include a form that allows the user to enter a book title, description, and price, and select a category from a drop-down list.

All form elements are required.

The price must be a positive number.

The form should be sticky (retaining any values previously entered by the user), and post to itself (please)

When all data is valid, display a summary.

Please don't use java, paython ... etc, the code should be ((( only php and sql)))