Incorrect description of function array_map()?

Hi,
I wonder whether the documentation of the array_map() function is correct?

The documentation describes arrays as being "ordered maps that 
associates values to keys". The "key" is what is called "index" in other 
languages. The PHP doc mostly uses the word "key", and less often the 
word "index".

I further read in the doc of "array_map()" that "array_map() returns an 
array containing the results of applying the callback to the 
corresponding index of array (and arrays if more arrays are provided) 
used as arguments for the callback."

But the function applies the callback to each "value" of the array, not 
the "keys", right? Shouldn't the doc say "... applying the callback to 
the corresponding values of array..."?

-- 
Cheers, Peter