1. Make sure you have Docker installed. brew install docker, sudo apt-get install docker, or download Docker directly from their website.
2. Download and install Docker Compose. It let's us manage Docker easier.

1. Open your command line (Bash for Ubuntu for Windows, Terminal, Bash.. which ever you prefer).
2. cd to the directory you want to learn PHP inside. This is usually your Documents folder.
3. git clone https://github.com/KalobTaulien/PHP-Docker.git learn_php this will clone this repo onto your computer. (You may need to download git for this to work; otherwise you can download the .zip of this repo)
4. cd learn_php or open Explorer/Finder and navigate to where your new files (the ones in this repo) are located.
5. Run make build (you may need to install a package to use the Makefile).
6. Run make up
7. Run make enter. This will open your new Docker container (think of it as an operating system inside your operating system; to exit the container type ctrl+d)
8. Run service apache2 start to start Apache inside your Docker container. Apache is the software that reads your PHP.
9. Go to https://localhost:8000/index.php and you should the welcome message!

To turn off your Docker container, type make down. To remove it entirely, type make clean.

To view all your containers, type: docker container ls -a. It will list your container name, id, ports and bindings, etc.

If you're using this to learn PHP and you've gotten stuck and you're frustrated, feel free to download XAMPP from https://www.apachefriends.org/download.html -- it will take care of all of this for you. ;)