You should take a look at the RecursiveDirectoryIterator and SplFileInfo classes : those would help you having a shorter code -- and probably easier to understand, too ;-).
There are a number of standard PHP functions that could make things work a lot better in your code. As mentioned earlier, you should check out RecursiveDirectoryIterator. If you don't want to go that far, you should at least check out scandir and pathinfo.
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