Adam Meyer wrote:
How does mediawiki get this information? From what i can see it is not stored in the sql database, is there an algorithm or some script that knows?
Just so you know, the algorithm is explained here: http://www.mediawiki.org/wiki/Manual:MediaWiki_file_usage#User-accessible_files with the details on MD5 here: http://en.wikipedia.org/wiki/Md5
Jim's answer is likely more useful if you're not a programmer.
Mike