Array_multisort不按第二个数组排序

Question

I have a multidimensional array and I would like to sort it so that both arrays are sorted by the flag SORT_NATURAL and then either SORT_ASC or SORT_DESC

So from what I understand it should look like this:

array_multisort($array1, SORT_NATURAL, SORT_ASC, $array2, SORT_NATURAL, SORT_ASC, $array); 

But it seems to only be applying the SORT_NATURAL to the $array1 and the $array2 is not sorted at all, not even the sort direction is applied.

But as soon as I remove the SORT_NATURAL form $array2, the sort direction works.

So- $array1 sorts perfectly fine, but $array2 does not sort at all.

What could be the problem? Am I missing something?

public function sortMultiDimensional(&$array, $subKey, $subKey2, $sortorder_packing_bool=false, $sortorder_packing_secondary_bool=false) {
    $array1 = array();
    $array2 = array();
    foreach ($array as $key => $row) {
        $array1[$key]  = $row[$subKey];
        $array2[$key] = $row[$subKey2];
    }
    if($sortorder_packing_bool)
        $sortorder_packing_bool = SORT_ASC;
    else
        $sortorder_packing_bool = SORT_DESC;

    if($sortorder_packing_secondary_bool)
        $sortorder_packing_secondary_bool = SORT_ASC;
    else
        $sortorder_packing_secondary_bool = SORT_DESC;

    array_multisort($array1, $sortorder_packing_bool, SORT_NATURAL, $array2, $sortorder_packing_secondary_bool, SORT_NATURAL, $array);
}

Answer 1

Check this example,

$data = [];
$data[] = array('volume' => 67, 'edition' => 2);
$data[] = array('volume' => 86, 'edition' => 1);
$data[] = array('volume' => 85, 'edition' => 6);
$data[] = array('volume' => 98, 'edition' => 2);
$data[] = array('volume' => 86, 'edition' => 6);
$data[] = array('volume' => 67, 'edition' => 7);

foreach ($data as $key => $row) {
    $volume[$key]  = $row['volume'];
    $edition[$key] = $row['edition'];
}

array_multisort($volume, SORT_DESC,SORT_NATURAL, $edition, SORT_ASC,SORT_NATURAL, $data);


print_r($data);

Check here working code.

It is like group by a,b.

SORT_NATURAL working like this for example.