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  Tutorial: PHP E Commerce Building a Shopping Cart Class in PHP Tutorial

An introduction to building a class in PHP using a shopping cart as an example.

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Code Beach - Building a Shopping Cart Class in PHP

Building a Shopping Cart Class in PHP by: Amrit Hallan
Classes have eluded me ( rather I have eluded them ) since the beginning of my primitive programming days ( remember Turbo C++? ). They have always hovered over the horizons. This hasn't nagged me much, for I've been managing without classes pretty well, but sooner or later I had to come in contact with them. So in the morning ( and I hadn't slept the entire night ) I executed a gut-wrenching plunge into the depths of classes, and the shopping cart class was the first thing I wrote. Although I have made content management systems and algorithmic quote generations in PHP, I had not added a shopping cart class code to my code repository. It was not as tough as I had envisaged. I could have done something simpler but scripts like "Hello world!" seem silly after a point.

A class, as what I make of it is, a container of sorts that not only contains the variables required to perform a task, but even the sub-tasks to achieve the main objective. So what do we need in a cart class? We need an array that can store item ids and their quantities, and we need some functions that help us add items, delete them, and change their quantities. It is always better to write down a list of things to be done and a list of things needed to accomplish that.
We begin our class like this:

class ShoppingCart {
var $items;
}
?>


 

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