What is a backend?

The backend usually consists of three parts: a server, an application, and a database. If you book a flight or buy concert tickets, you usually open a website and interact with the frontend. Once you’ve entered that information, the application stores it in a database that was created on a server. For sake of ease, just think about a database as a giant Excel spreadsheet on your computer, but your computer (server) is stored somewhere in Arizona.

All of that information stays on the server so when you log back into the application to print your tickets, all of the information is still there in your account.

We call a person that builds all of this technology to work together a backend developer. Backend technologies usually consist of languages like PHP, Ruby, Python, etc. To make them even easier to use they’re usually enhanced by frameworks like Ruby on Rails, Cake PHP, and Code Igniter that all make development faster and easier to collaborate on.

Front-end is the client-side for example Javascript is a front-end scripting language that is proccessed on the clients side on their device. Back-end is the server-side for example PHP is a back-end language that is proccessed by the server and not the client's device.

.For example you may have a PHP function that outputs a HTML file to the front-end.. the PHP function is proccessed by the back-end server-side and then the HTML file is served to the front-end on the users client-side where their browser will process the HTML file without even knowing anything about the PHP that was proccessed on the back-end.

Hi, I believe this video will explain everything: https://www.youtube.com/watch?v=pB0WvcxTbCA