Hi
This looks like a useful piece of software for cron monitoring.
One question I have - are you limited to only 1 script on the worker nodes ? I think it would be much easier to have a php script that polls the master node for jobs, then offloads this to a shell script that can process the job, wait for the output, and then upload that result to the master.
In order to upload the cron results etc, I'd envisage an apache-writeable upload directory to hold the logs from the remote nodes, and a separate php file on the master to handle the file upload \ cron job result.
Figure I can have this done by the end of the week for you, will get on with a mock-up of the UI first so you can look at that, then start to deal with the worker nodes.
Any questions before we get started, let me know.
Cheers
Mike