排序不规则的php数组

Question

I am trying to sort an irregular php array. It is irregular in that the structure is different than normal php arrays. I am usually able to sort arrays using usort, but the structure of this php array makes usort hard to use. Here's a basic structure of the array:

            Array
(
    [id] => Array
        (
            [0] => 3220604
            [1] => 5341522
            [2] => 1234568144
            [3] => 11
        )

    [firstname] => Array
        (
            [0] => Sam
            [1] => Donald
            [2] => Keesh
            [3] => Eat
        )

    [lastname] => Array
        (
            [0] => Fisher
            [1] => Duck
            [2] => Smelley
            [3] => Me
        )

)

I am trying to sort by ID, but of course, if I use usort, it tries to sort by the highest order arrays, like id, first, and last. How would I sort an array with this kind of structure?

Answer 1

You can use array_multisort to do this:

$arr = array(
    'id' => array(3220604, 5341522, 1234568144, 11),
    'firstname' => array('Sam', 'Donald', 'Keesh', 'Eat'),
    'lastname' => array('Fisher', 'Duck', 'Smelley', 'Me')
);

array_multisort($arr['id'], $arr['firstname'], $arr['lastname']);
var_dump($arr);

Here array_multisort sorts the values of the first array and orders the values of the other arrays accordingly.

But using a different data structure might also be advisable.