Wikimedia Bugzilla is closed!

Most skins use SkinTemplate as a base. In here, $this->skinname 
is marked private. However, some skins are based on Skin. In 
Skin, there's no such 'property'. 

Skin has a member function getSkinName(). This function returns 
the name of the skin, which defaults to 'standard'. This 
function should be overwritten by derived classes.

SkinTemplate is based on Skin. It does NOT overwrite the 
getSkinName() function, thus returning an incorrect skinname (i.
e., 'standard', instead of 'amethyst')

To ensure correct working of the code, there should be an $this-
>skinname in Skin.

Proposed fix:

In Skin::Skin(), add "$this->skinname = 'standard';"
Replace "return 'standard';" in Skin::getSkinName() with "return 
$this->skinname;"

After this, developers can use $skin->getSkinName() and it will 
return the correct skinname, regardless of its parentclass 
(SkinTemplate, Skin ).

Skins based on Skin have overwritten the getSkinName function. 
So those won't be affected.