phpsortingmultidimensional-array

Sort 1st level keys and 2nd level keys of a 2d array

I got a multidimensional array which may look like this:

$array[1][0] = "string";
$array[0][1] = "anotherstring";
$array[0][0] = "thirdstring";
$array[1][1] = "fourthstring";

I want to sort this array by keys so it looks like this:

$array[0][0] = "thirdstring";
$array[0][1] = "anotherstring";
$array[1][0] = "string";
$array[1][1] = "fourthstring";

At the moment I am using the following procedure:

ksort($array);
foreach ($array as $key => $value) {
        ksort($value);
        $array[$key] = $value;
}

This does work perfectly, but maybe there is a better (in-built) function to do this?

Solution

  • You can shorten your loop with:

    ksort($array);
foreach($array as &$value) {
        ksort($value);
}

    Or use array_walk:

    ksort($array);
array_walk($array, fn (&$value) => ksort($value));