How to a rum a program for each imported record

Dear WDMTech support,

I am able import records into a custom table with vData. I want to run a PHP script or a function for each record imported.
I see there is a trigger event at import profile.
Where should I implement this trigger?
How can I make my function selectable from the event list in the import profile?
My imported data is NOT of "content" component.
Would you send me some example?

Thank you.