libstemmer on PHP5; haystack + needle in, parsed result out. Requires compiled library and sample executable @ /w/lib/libstemmer.
Use #php-libstemmer for PHP 7.4+.
Unrelated, but Happy New Year everyone. It's 4PM of the last day of 2020 and I want to start a tradition of pushing at least one public piece of code a year. Cheers.