Learn HTML the Quick Way
Having some background knowledge about basic HTML programming will really allow you to become a better PHP programmer.
I personally believe that the more HTML knowledge you have, the more creative you can be when it comes to creating PHP scripts.
If you have never heard of HTML or are looking for a quick and easy way to learn some of the basics, the website below (w3schools) is a great source to get started:
This website provides over 100 HTML tutorials for beginners, as well as a online text editor so that users can test out their code.