Trim Framework is a super lightweight PHP framework to kick-start your web app.
This is the homegrown PHP framework I use on most of my projects. I finally decided to make it its own project so I can quick-start future projects, and improve the basic framework.
Out of the box trim-framework gives you pretty URLs, layouts, and MVC structure.
If your hosting this app in your web root directory, the "www" folder is public facing, the other folders should remain private.
If your hosting this app in a sub-directory, you can rename the "www" folder to something more suitable to your project.