Lesson 27 - E-shop in PHP - Shopping cart
In the previous lesson, E-shop in PHP - Test data, we added 100 test products to our e-shop. The next couple of tutorials will be about creating orders, i.e. adding goods to a cart and passing them through the checkout.
Shopping cart
Users add products to a cart, then, when they're done, they proceed to checkout and finish the order. This functionality is done in different ways in different e-shops, either on server-side or client-side. Let's introduce all of the possible approaches, their advantages, drawbacks, and then decide which one to use.
Client
We could store data into cookies or a local storage on the client-side.
Cookies
Cookies represent the mechanism designed to keep a website's state information.
They have the following benefits:
- They are widely supported by browsers
- They are persistent (it doesn't happen that the data expires after a short time)
And these disadvantages:
- Size limitation to 4096 bytes
- Data is sent to the server with each request, which is not a disadvantage, but it does not make much sense in our case
Local storage
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In this tutorial, we'll discuss the different approaches of implementing shopping carts in e-shops, choose the best one, and create a table for orders.
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