flowering question

Ive had people tell me that im suppose to go dark and no water the last two days before harvesting is this true..can someone help....

It does seem to be a part of some/many folks finishing philosophy, one I don't employ. I might let my plants thirst some just before harvest, but the darkness thing doesn't make any sense to me.
Seems it'd tend to cause the buds to s-t-r-e-t-c-h and thus, loosen, but I wouldn't know for certain,

I would run jut water the last week for sure

Yes you want to cut the water out at the end. As for the darkness we've never tried it but it seems that a lot of people do it and sware by it. So it's up to you but before you deceide make sure you did enough research to make a good desicion.

The dark thing is bull! That is just a May J myth! Plants are all set up genetically,thus if a plant is in flower then it will continue to flower until finished. This includes potency too. Now for the water part i always water up until the day of harvest, although a plant is made up mostly of water you can stop watering maybe a day or two before harvest to help the buds dry a little faster than to transpire excess water in the branches and stems.