[boelie]

You can make a variable between the functions

For example here only admins can do this..

Код:

  
if (IsPlayerInAnyVehicle(playerid) && GetPlayerState(playerid) == PLAYER_STATE_DRIVER)
  {
  if(isplayeradmin(playerid)
  {
  if (newkeys & KEY_CROUCH)
  {
  new Float:xx, Float:xy, Float:xz;
  GetVehicleVelocity(GetPlayerVehicleID(playerid), xx, xy, xz);
  SetVehicleVelocity(GetPlayerVehicleID(playerid), xx, xy, xz + sf);
  }
  }
  return 1; 
  }

I suggest you try out the new setvparint function here to make your own 'variable'
https://sampwiki.blast.hk/wiki/SetPVarInt