include vs. function

Hey all, I am wondering as far as performance which would be better? ####### # Scenario 1 ####### include("file.php"); include("file.php"); include("file2.php"); include("file2.php"); ####### # Scenario 2 ####### include("file.php"); function1(); function2(); function1(); I don't know the internal workings of php. But I see a few possible outcomes here. In Scenario 1 it loads each include into memory and caches all of them, Quickly eating memory. OR it loads 1 of them in to memory dumps it, gets it again, dumps it, etc. Causing a lot of disk I/O and causing a potential bottleneck. I think you can imagine all the possibilities here. So what would be best? Thanx, Jess