Function to return a quoted function for a given key binding

Question

I am looking for a function that returns a function (preferably quoted) for a given key binding. I know about C-h k (e.g. M-x describe-key), but I am looking for a lower-level function. (My use case is that I want to save a previous key binding before rebinding it.)

Answer 1

I found the aptly-named key-binding after reading the source code for describe-key:

key-binding is a built-in function in `C source code'.

(key-binding KEY &optional ACCEPT-DEFAULT NO-REMAP POSITION)

Return the binding for command KEY in current keymaps. KEY is a string or vector, a sequence of keystrokes. The binding is probably a symbol with a function definition.