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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.


We could store data into cookies or a local storage on the client-side.


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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Article has been written for you by David Capka
The author is a programmer, who likes web technologies and being the lead/chief article writer at He shares his knowledge with the community and is always looking to improve. He believes that anyone can do what they set their mind to.
Unicorn university David learned IT at the Unicorn University - a prestigious college providing education on IT and economics.