scanned in & manipulate to a pdf

I got a Windows program, which can scan in a book by scanning in the pages 1,3,5, ....n turn the book by 180 degrees and scan in from the back side n-1,n-3, ... 2. Then the program made a pdf book of the scanned in pages. I am not sure if a php program is the right way to do, but I thought to do the same by scanning in the pages (p0001, p0002, p0003, .....) and then work on each page in a batch to turn p0001 by 180 degree and rename it to a0001, rename p000(n-1) to a0002, turn p0002 by 180 degree and rename it to a0003 .... and add each page to a book.pdf Is php right for that? bye Ronald