按索引对PHP中的数组进行排序

Question

I have following array:

   $array[0]["nbr1"] = 5;

   $array[0]["nbr2"] = 7;

   $array[1]["nbr1"] = 1;

   $array[1]["nbr2"] = 6;

   $array[2]["nbr1"] = 2;

   $array[2]["nbr2"] = 3;

How can I sort this array first by "nbr1" descending and than by "nbr2" descending? I tried different things that were explained on the web but none of them worked for this scenario.

Thx

Answer 1

array_multisort($array[1], SORT_DESC, SORT_STRING);