[UPHPU] simple??? php function (display an index)

[Caleb Call]

Is it possible (or is there a simple way to) create an index.php page  
that will just show all the files in the directory?  Similar to not  
having any index page at all.  I'd like to just show the files but  
I'd also like to be able to apply a stylesheet to the directory?   
I've tried searching php.net but I really don't know what I am  
searching for.  Any help would be greatly appreciated.