WHMCS how to add function to the system's cron job?

Question

I created an addon for whmcs in whmcs/modules/addons directory which I want to run it by the system's cron job. WHMCS's cron job uses this:

php -q /var/www/html/whmcs/whmcs/admin/cron.php

to automate module functions (suspension, termination) and billing settings.

Any ideas to add function to automate my addon using the same cron job while cron.php is encrypted?

Answer 1

Just in case you are still looking at this in 2018, docs have changed, you can find DailyCronJob docs here: https://developers.whmcs.com/hooks-reference/cron/#dailycronjob

Also here you can find an entry point for modules creation in WHMCS: https://developers.whmcs.com/modules/