have some one shift the car for you while you watch the cable end on the tranny. you'll see it working if it works still, or see just a cable shoot out by its self if its broken.
one way to figure this out is to put the car in neutral then get out and try to push it, if it wont move its still in park, if it wont move and pushes back like it would in park. the cable broke off somewhere.
rock it in park first so you know how that feels, then put it in neutral and push it. your butt on the driver side door jam is more then enough to make the car roll. dont push it from the bumper, or the car may get away from you. unless you have a driver in the car. aka some one to hit the brakes for you if it moves.