Can you craft a magic item that's both a staff and a magic weapon?

Question

I'm looking a lot into the rules of magic item creation for a Pathfinder campaign. One of my friends playing in the campaign is a big D&D aficionado who remembers some rules about combining several types of magic items into one item, for example a magic weapon that is also a staff.

The description of typical staves seems quite unambiguous about what a staff is supposed to be, but the magic items creation rules are nebulous about what a staff can be made of exactly.

Is it possible by RAW to craft a magic item combining two types of magic items ?

Answer 1

The rules you quoted answer you, with one exception:

No, you cannot make just anything a staff.

However, based on certain named Staves and other Wondrous Items, you could make a quarterstaff, cudgel (or other weapon by GM Fiat) 'staff' that is also an Enhanced Weapon.

From Creating Magic Items (Staves):

To create a magic staff, a character needs a supply of materials, the most obvious being a staff...

And from Staves

Physical Description: A typical staff measures anywhere from 4 feet to 7 feet long and is 2 inches to 3 inches thick, weighing about 5 pounds. Most staves are wood, but an exotic few are bone, metal, or even glass. A staff often has a gem or some device at its tip or is shod in metal at one or both ends. Staves are often decorated with carvings or runes. A typical staff also functions as a walking stick, quarterstaff, or cudgel.

Finally, some examples of weapons with Enhancements that are also Staves:

Staff of Power "..is also a +2 quarterstaff..."

Staff of the Hierophant "...is also a +2/+2 quarterstaff..."