OK so I've downloaded XAMPP v 3.2.2. I've put my php file, along with a number of other files that it references, in the folder C:\xampp\htdocs and successfully started Apache and My SQL through the XAMPP control panel. I then double click on my php file to open it in Chrome. That's my understanding of what I have to do.
But it doesn't work. I just see the code listed in the browser. What am I doing wrong?