PHP Classes and including files

Question

I am needing some information on including files in PHP classes. E.G.

include Foo2.php; //<--- Is this good?    
class Foo {
      function doFoo(){
         include("Foo2.php"); //<--- or is this better?
         //do something with vars from Foo2
      }
}

I was wondering what the differences were beside scope and if there were any other ways to include another php file in a class.

Thanks in advance for any responses.

Answer 1

include at the global scope. It's much readable and maintainable.