Question

Here is data

$array = array(
    'random' => 1,
    'pewpew' => 2,
    'temp' => 5,
    'xoxo' => 3,
    'qweqweqe' => 4,
);

$fields = array('random', 'xoxo', 'temp');

I need to get in result:

$result = array(
    'random' => 1,
    'xoxo' => 3,
    'temp' => 5,
);

I mean keys presence/order from $fields apply to $array.

The question is:
Can I perform this transformation using only array_ functions? (I don’t wanna use iteations)
If yes: can you link me function that I need?

(sorry for spelling mistakes)

upd.

PHP 5.2

Answer 1

This code preserves order and works in PHP 5.2 as required

One line:

$result = array_merge( array_flip($fields),
                       array_intersect_key(
                                          $array,
                                          array_flip( $fields )
                                          )
                       );

For performance:

$flip = array_flip($fields);
$result = array_merge( $flip
                       array_intersect_key(
                                          $array,
                                          $flip
                                          )
                       );