Standalone PHP Web apps procmail interface

Hello, Does anyone know any standalone PHP web apps that can read/write/edit procmail filter ? Even if it only supports a subset of all the procmail capabilities, the app would be pretty useful to me. Mostly our users would just need to filter mails based on header to separate IMAP folders. Most of apps are some sort of plugins or integrated to a web-based mail apps like Horde/IMP or SquirellMail. I am looking for a standalone version that generates procmail file that I can just copy to the ~/.procmailrc (via cronjob, for example). Thanks. RDB -- Reuben D. Budiardja Dept. Physics and Astronomy University of Tennessee, Knoxville, TN