What iPhone charger should I get? The apple or knock off?

They only have a $7 dollar difference at Best Buy (apple charger being more $). Are they the same? Am I better off to get the knock off and save $7? Will an apple charger last longer?

Frankly I would never buy a cheap charger - if your phone goes up in smoke…

Any good, standard, USB charger is going to be fine.

Try to ensure it has at least a 500mA output or charging times will be slower than they could be. Higher output models don't charge any faster but also don't do any damage. So if you got a 1A (= 1000mA) charger then phone would just draw what it needs and no more.

As long as its just the chord then I think you are fine. I just wouldnt yank it out of the wall as most do, thats how they end up breaking.

Stick to the original.