I was hired to code a simple PayPal shopping cart. PHP and MySQL database were used to categorize and store a couple dozen products.
Code was written to sort products for display in a specific order. The client generated PayPal shopping cart buttons that were stored in the database and output on the product details page along with product details and thumbnail slideshow of the products.
Unique page titles and meta tags were also stored in the database and dynamically generated on each product page to address search engine optimization.