2 questions

[eluser]Unknown[/eluser]
First: why is the codeigniter database WHERE method not mentioned in the user guide? I just spent 2 hours trying to figure out why my SQL statement isn't working (I had to watch the video tutorial), please add it in!

Second: I have a function inside another controller, how can I access this from another controller (like, I want the function to be available from the index controller)

Basically, I have a function inside a controller, and in the home_view page, I want to check what value the function returned, and generate data based off of that.
How can I use the function?

Thanks guys!