Question

array(
    [0]=>
        [index1]=>something
        [index2]=>something else
        [index3]=>something more
    [1]=>
        [index1]=>something
        [index2]=>something else
        [index3]=>something more
    [2]=>
        [index1]=>something
        [index2]=>something else
        [index3]=>something more
)

EDIT:
So I would like to retrieve the following:

array(
    [0]=>
        [index1]=>something
        [index2]=>something else
    [1]=>
        [index1]=>something
        [index2]=>something else
    [2]=>
        [index1]=>something
        [index2]=>something else
)

How do I get multiple indexes of the array using the Set::extract function in cakephp?

This retrieves one value:

Set::extract($array, '{n}.index1');

but I would like to get multiple values … say, index1 and index2.

I tried statements like the following, to no avail.

Set::extract($array, '[{n}.index1, {n}.index2']);

EDIT

    $__pages = Hash::merge(
                    Hash::extract($pages, 'pages.{n}.id'),
                    Hash::extract($pages, 'pages.{n}.title')
                    );
    pr($__pages);

Output:

Array
(
    [0] => 2
    [1] => 4
    [2] => 104
    [3] => Sample Page
    [4] => about us
    [5] => Services
)

That doesn’t really help me since I still need the association like so:

Array(
   [2] => Sample Page
   [4] => About us
   [104] => Services
)

I would even be happy with :

Array(
   Array(id => 2, title => Sample Page)
   Array(id => 4, title => About Us)
   Array(id => 104, title => Services)
)

ANSWER
thecodeparadox’s answer works for the test code that I provided. Here is the real life code in case someone stumbles here.
In the book it states, “any string literal enclosed in brackets besides {n} and {s}) is interpreted as a regular expression.”
This line seemed to be hidden and not very blatant. So knowing this, I simply used regex rules to retrieve the data I needed. I have an array that pulled wordpress posts from an api, I needed to narrow down the results to id, title.

array(
   posts=>
      0=>
         id => 3
         slug => sample-page
         type => page
         title => Sample Page
         //...and so on 

      1=>
         id => 7
         slug => sample-page-2
         type => page
         title => Sample Page 2
         //...and so on 

To retrieve just the id and title I added the following line.

pr(Set::classicExtract($pages, 'pages.{n}.{(id|title)}'));

this gave me:

array(
   posts=>
      0=>
         id => 3
         title => Sample Page

      1=>
         id => 7
         title => Sample Page 2

DOCUMENTATION: Book

Answer 1

$arr = array(
            array(
                'index1'=>'something',
                'index2'=>'something else',
                'index3'=>'something more',
            ),
            array(
                'index1'=>'something',
                'index2'=>'something else',
                'index3'=>'something more',
            ),
            array(
                'index1'=>'something',
                'index2'=>'something else',
                'index3'=>'something more',
            )
        );

$output = Set::classicExtract($arr, '{n}.{index[1-2]}');

print_r($output);

// output


Array
(
    [0] => Array
        (
            [index1] => something
            [index2] => something else
        )

    [1] => Array
        (
            [index1] => something
            [index2] => something else
        )

    [2] => Array
        (
            [index1] => something
            [index2] => something else
        )

)