I would like to make my url of:
example.com/index.php?this=a&that=b
to:
example.com/index.php/a/b
So that whenever somebody visits this page directly:
example.com/index.php/a/b
It will display in the address bar as typed, but will render the content for:
example.com/index.php?this=a&that=b
How is that done?