Nel

OK, so I started learning HTML a few years ago and so far, I know the basics;
mailto: command
IMG SRC command
etc

So what is PHP, can you do more with PHP. What I actually want to do is embed an email form into a HTML document and I know that the only command that supports this is mailto: in HTML but that just opens the default email program, what I want to do is embed the email form. So can I accomplish this in PHP. Is PHP hard to learn. Is it simpler that HTML?
Please Help?
Thanks in Advance!
How to I save a file? Can I do it in Notepad?
If I was to save a file in notepad with the .php extension, how do i view it on my computer.
PS; I am creating web sites, so I just need to know how I can execute php scripts in a web browser. PS; I am a beginner to PHP.