I wrote a similar tool used internally by my employeer. It uses File::Find to look for files with a given extension. A list of wanted extensions is kept in a hash with the value being a referance to a subroutine. The sub can then read in the file data and do some checks on it. The sub returns a hash which contains the results of those checks. The culmitive data is then used to build some HTML, which is saved to a file and can later be downloaded by our staff.

There are some limits to what you can do. Perl is really hard to parse, so a full syntax checker is pretty much out of the question. Something basic like if(/^\s*use strict/) is the best you can hope for. Still, it's better than nothing.

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Reinvent a rounder wheel.

Note: All code is untested, unless otherwise stated