> You only > need the second hook if you want to check the values of options > against the values of other options. +1
I did not think of adding a new hook, because there must be a really good reason to add a new hook. I think it's justified for this case. It's better than my approach since the extension author can just put all their checks in one place rather than having to register a bunch of handlers. > some loadable module adds two new options LEFT and RIGHT and wants to > check that you don't specify LEFT and RIGHT together? Either they > register the same validate handler for both, or they register the real > validate handler for one and a no-op handler for the other. Neither of > those options seems very appealing. When I thought about this, I figured that one of the options will register a validate handler and the other option will set the handler to NULL. But, I do see why this is not appealing. -- Sami
