PHP Help Needed

[Fyron]

So I am trying to spruce up my image mod mirror page... I am running into problems with trying to sort the files to be in alphabetical order (and hopefully be able to include options to sort in other methods as well). No, I am not going to write this to use a database. It does not sort properly, and I have no idea how to make it do so. Yes, there is a lot of theoretical code commented out. The sorting portion begins at this like:

// Sorting that doesn't work. :'S

Here is the code:

http://imagemod.spaceempires.net/indexmda.txt

And here is the script running:

http://imagemod.spaceempires.net/indexmda.php