I agree with the training methods everyong has suggested. Or keeping the door locked so when company comes over, you have to pick Phoebe up and then open the door.

Another method that will require two people: One person stays inside with Phoebe and the other goes outside and knocks or rings the door bell. Whoever is outside should have a "puppy bomb" (a soda can with several pennies inside, tape the opening closed). When the person inside opens the door and Phoebe tries to run out, the person outside jumps out from behind something shaking the can at her. This should scare her enough not to do it again.