The best ways to grow phals are (1) in glazed ceramic/terra cotta pots with air holes on the side, (2) regular plastic pots...just make sure they have good drainage or (3) in hanging baskets (made of wood sticks with ~ 1cm space between them).
If you decide on the glazed pots, then I would be VERY careful not to overpot (plant in too big a pot) and would reduce the amount of sphagnum moss in the mix. In fact, the two phals I have growing in pots are in 90% bark chips, 10% sphag moss. Too big a pot or too much moss almost always leads to root rot.
If you go with the latter (I think wooden baskets are great) then you can add more moss to the mix (moss:bark = 25:75) and there's much less chance for overwatering since so much of the potting medium is exposed to air. However, it also means that you'll have to be more diligent in making sure your plant doesn't dry out, especially if you heat your place during the winter (major humidity drop).
Whatever you do, do NOT grow them in unglazed terra cotta for two reasons: 1. If the pot remains constantly moist then fungus can start growing on the pot and 2. the pot retains salts which over time can be detrimental to your plant.