Server RPCs 101

--How-to for SP-friendly server-sided RPCs

--The function which contains actual code
local MyFunctionToExecuteOnAllMachines = function(arg1,arg2)
    --code
end

if not worldInfo:IsSinglePlayer() then
    worldGlobals.CreateRPC("server","reliable","MyFunctionHost",function(arg1,arg2)
        MyFunctionToExecuteOnAllMachines(arg1,arg2)
    end)
else
    worldGlobals.MyFunctionHost = MyFunctionToExecuteOnAllMachines
end

--And then you can just call "worldGlobals.MyFunctionHost" when needed and don't care for SP/MP checks