Only today I realised this: if you download a MCPE Survival map you can build and activate Nether Reactor Cores on the Map. Simply build a Nether Reactor. The Reactor should look like this:
Activate the reactor by right clicking on the Core. Once activated, Zombie Pigman should appear and a tower made of netherrack will appear. Enjoy!
If you can’t get the reactor working then make sure the map is Survival Mode (Technically it treats you like you are in Creative still) and find some advice online (example search. How to build and activate the nether reactor in MCPE 0.6.1) until it works.
If you have got it working then wait until holes naturally generate in the walls of the netherrack building. Then escape from the Zombie Pigmen!
Epic Chas Gamer 🙂