Building an E-Book Store with PHP involves several steps. Here is a simplified guide to help you get started:

1. Set up the development environment:
– Install PHP on your machine.
– Set up a web server (Apache, Nginx) and configure it to work with PHP.

2. Design the database:
– Create a MySQL database to store information about the e-books.
– Determine the necessary tables and fields. For example, you might have tables for books, authors, categories, and customers.

3. Create the database connection:
– Write a PHP script to connect to the MySQL database using PDO or mysqli.

4. Create the basic web pages:
– Design the layout of the website using HTML and CSS.
– Create PHP scripts to handle the navigation and display of the different pages.

5. Implement user authentication:
– Create a user registration form to allow customers to create accounts.
– Write PHP scripts to handle user login and logout.

6. Display e-books:
– Retrieve e-book information from the database using PHP.
– Display the e-books on the website, including title, author, category, and cover image.

7. Enable searching and filtering:
– Implement a search form that allows users to search for e-books by title, author, or category.
– Add filters to allow users to narrow down the list of e-books based on criteria like price or rating.

8. Implement shopping cart functionality:
– Allow customers to add e-books to their cart.
– Create PHP scripts to handle the addition, removal, and updating of items in the cart.

9. Handle the checkout process:
– Design a checkout page where customers can review their cart and enter their payment information.
– Implement PHP scripts to validate the payment information and process the transaction.

10. Add administrative functionality:
– Create an admin dashboard where the site owner can manage e-books, categories, authors, and customer orders.
– Implement authentication for the admin users and restrict access to the admin pages.

11. Add additional features (optional):
– Implement a rating/review system for e-books.
– Allow customers to save e-books to their wishlist.
– Support multiple payment methods (e.g., PayPal, Stripe).

12. Test and deploy:
– Test the functionality of the website, including browsing, searching, adding to cart, and checking out.
– Deploy the website to a web hosting service or server.

Keep in mind that this is a high-level overview of the process, and there are many details and considerations to take into account when building an e-book store. It is also important to follow security best practices, such as input validation and protecting against SQL injection attacks.