Basic Shopping Cart

This is an example how to use just PHP to add, update and remove products from a shopping cart

Prerequisites

This example requires that you have nginx or somthing similar to run it in you localhost. However, you can use this repository that already has the nginx configured nginx-proxy.

nginx
Docker
docker-compose

Run

If you want to run it with nginx-proxy just download or clone the project and run the container.
```
    $ cd docker-nginx-proxy/
    $ docker-compose up -d
```

Clone BasicShoppingCart docker Example and build it with docker-compose

    $ cd BasicShoppingCart/
    $ docker-compose build && docker-compose up -d

Connect into the container and run composer, the following command will install the vendors.
```
    $ docker exec -it shopping bash
    $ composer install
```
Add the virtual host into you /etc/hosts file 127.0.0.1 shopping.docker
Now open your browser and go to shopping.docker

Test

Now the application should be up and running. You will be able to add products to the cart and update them without duplicates.

Code

This code is pretty simple and you can follow through. However, here I will brief you with the main files.

code/src/index.php Here you can find the main class App that send the initial products to the class Product. Receives the parameters through $_GET and send them to class Cart.
code/src/classes/Products.php This class has a recursion function that will clean and validate the initial data preventing duplicate products, empty arrays and non floats or integers values.
code/src/classes/Cart.php This class manage the products in the cart adding, removing and updating prices.
code/src/views Here you can find the HMLT files that will be render in the browser.

Note

For more information about PHP check its official documentation.

Improvements

The variable $_SESSION stores the main data. However, it can be possible to create a service and manage this session through the server.