Windows 7: how can I set up a scheduled task (run a batch file) based on a file getting modified?

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Windows

PHP

batch

TaskScheduler

Hello,
I would like to set up a Scheduled Task to run a batch file every time a file of my own creation is modified (via php).

Any help would be appreciated. The documentation on event triggers seems a bit slim right now.

Thanks in advance.

-S


P.S. As far as I understand it, this is possible. If I am just blowing smoke, an alternative suggestion would be great.

Edit: I suppose right now I am looking for some clarification on the "log, source, event id" part of setting up a scheduled task when an event is logged. Suggestions?

Edit 2: If it matters, note that my batch file requires an internet connection to run correctly.