title: How to destroy the php session with one button
body: <p>I'd like to make a simple form button which completely destroys the session when you click on it. I am just starting to use PHP for the first time, and do not see how I implement it into my HTML code.</p>
  
  <p>What I'd like is simply a form button which will clear the session (and possibly an explanation as to how it works)</p>