Does GoogleBot claim sites are duplicate content if code used to run the PHP of a website is very similar to other sites? More specifically, if I utilize a turn-key type script as my homepage, though i completely redesign every page (location of variables.. i mean a COMPLETE redesign).. if googlebot crawls my php file, which hasn't changed much, is it duplicate content? sy
Google doesn't see your PHP code--just the output. So, if you have a page that simply says "Hello" on it, Google wouldn't know if it was because your code said echo 'Hello'; or print 'H' . 'e' . 'l' . 'l' . 'o'; -- or anything else that does the same exact thing. On the other hand, if your code is spitting out identical templates for many sites, that could be detected... if that matters to you.
Google does not look into the PHP codes like what mike and nicuz have mentioned. A lot of forums are using PHPBB as forum templates but they are viewed as different entity as a whole. Content is the key here