I'm looking for some help to use one form to submit to multiple forms on other sites.

It would happen something like this:

1. Use a form I created to enter a value
2. Open connection to other url
3. Use value from my form to complete a form on other url
4. Submit form on other url

I need to be able to do this multiple times with the same form.
I'm not really sure where to start, is something like this possible with PHP?