Hi thank you for the reply. Actually i want to know the working of prestashop.
That is when a user click on product image what happens in background, what are the process involved.
When user clicks on add to cart button what happens in back-end and in database,
Like wise, i want to know what are modules and files that works for each operation that happens at the front-end, when a customer clicks on each link.(may be menu, categories, featured products, contact, user account........ it goes on).
Is there any pre written document in prestashop?