Anything I should know before I start this course?

Yes - HTML. HTML (Hypertext markup Language) is the simplest formatting language on the web. While PHP, Perl, ASP, and others transfer and process information, HTML makes it look good. For example, think of Microsoft Word. What you type into Word is similar to the function that PHP serves - it supplies the data. But just typing text into MS Word doesn't look very good. That is where the formatting features of Word come in. You can change the size, color, position, and look of the text in your document with the features of MS Word. That is what HTML does.HTML makes the information that you output from PHP look good.So that is why I recommend having a basic knowledge of HTML. If you don't know it already here are some good sites to help you learn this basic language.