Php and SQL code for product page and cart page

I need a PHP and SQL code development for a product page and cart page on my website. I selected PHP as the server-side scripting language for this job. The code needs to be able to perform AJAX requests, and it should also be able to interact with an existing database. I'm looking for experienced developers with a deep understanding of server-side technologies and database fundamentals to help me get this project done in a timely manner. Please submit quotes so that we can get started as soon as possible.