[Michael B]

I would suggest you to use Shift instead of 2, as some vehicle models already use this key (e.g. horn, sirens, tog wheels for planes).

PHP код:

else if(newkeys & KEY_JUMP) 


Regarding the errors, it seems that your variable "string[128]" is defined twice a the level where you get the error. Do you have another global variable around there, with the same properties?
At the second error, return a random value by using return 1; at the end of the function/public.

Edit: Too late, you already did it....