Best way to save data temporarily in php [closed]

Answer 1

This is exactly what sessions are for

Answer 2

While I was working on e-commerce sites we used to keep all the order data in sessions until user confirms order by going to payment gateway.

You can use PHP Session as arrays and store your data temporary and then destroy the session.

 $_SESSION['cart'][] = //you data here

Answer 3

Sessions and cookies are used for this purpose but sessions are more secure and reliable.