PHP: Variables, Numbers and functions in PHP

I haven't done many PHP Tutorials recently so I decided I'd be writing a couple of PHP tutorials over the new few days, pretty basic stuff nothing complicated. In this tutorial were going to be learning about variables and numbers in PHP, im going to show you how they work and how you can use them, you'll also learn how to create your own variables and how to use pre-defined variables. You'll also see how they work and how you can apply them to future scripts that you may make in the future!