PVC water pipes to toilet came apart

This is a first to me, have not heard of this happening before either on this forum or on the FB side.  That being said, if the two ends are "clean" (no cement chunks hanging on the pipe ends) you can get the following 2  products:  1) pvc pipe primer- this is purple in color and prepares/softens the pipe for the second step, 2) pvc cement.  Both can come in small containers, I believe as small as 4 oz size.  When doing this make sure you have good air circulation, open the door and run the fantastic fan.  The fumes from both the primer and cement or quite odorous.  Prime both ends to be glued, allow to dry for a minute (you don't want any wet primer in the socket end that you are gluing).  Next put a thin layer of glue to both ends, as you join them together turn one of the pipes 1/4 turn for best adhesion, if possible.  Allow to dry for 24 hours before testing, you will be good to go.  Having been in the golf course business for many years, I have had my share of irrigation breaks, from 1.5" to 6" irrigation lines, fortunately nothing larger has ever broken as we have a few areas that have 12" mains.  And fortunately I have never had to re-do a poorly glued joint over again using the above steps.  And yes, make sure both pipe ends are clean (from dirt, grease, old glue) before priming.  

Thanks for the detailed instructional advice.

I tried the pvc repair but it didn't work. So I guess I'll try Furpods advice to replace the valve. I don't see how the valve is connected (the two screws) on the back of the toilet or even how the toilet is connected to the floor. There is very little space between the back of the toilet and the wall. I was thinking maybe the pipe could be plugged until I can get home from this three week trip. Thoughts?

Thanks for the info