I'm new to regex so please forgive if the solution is really simple.

I need a plain expression that matches or extracts (not sure if I'm using the correct terminology) a string of 8 digits from the end of a URL. I need to insert the expression into an off-the shelf software application that will compile various types of lists for me.

The values for the match would be for the 8 digits in: domain.com/foobar/event_date.asp?RequestID=20100402. This didn't work: ^\?RequestID=[0-9]{8}$