Using subkey to sort an array in PHP

It’s a bit tricky to sort multidimensional arrays in PHP by one of array’s subkeys, but it can absolutely be done. Check it out:

/**
 * USING POINTER TO ARRAY - sort an array of arrays with associative indeces by one of those associative values
 * @param $array pointer to our array
 * @param $subkey associative index that we want to order by
 * @param $sort_type [SORT_ASC|SORT_DESC]
 * @return void
 */
function sortBySubkey(&$array, $subkey, $sort_type = SORT_ASC) {
   foreach ($array as $subarray) {
      $keys[] = $subarray[$subkey];
   }
   array_multisort($keys, $sort_type, $array);
}