Array Count Group dan Multidimension Array Sort pada PHP

Misalkan kita memiliki array sebagai berikut, kemudian ingin di group dan kemudian di sort seperti command di mysql.

Array
(
    [0] => Array
        (
            [countryid] => ID
            [countryname] => Indonesia
            [totalaccess] => 31
        )

    [1] => Array
        (
            [countryid] => US
            [countryname] => United States
            [totalaccess] => 23
        )

    [2] => Array
        (
            [countryid] => ID
            [countryname] => Indonesia
            [totalaccess] => 5
        )

    [3] => Array
        (
            [countryid] => ID
            [countryname] => Indonesia
            [totalaccess] => 2
        )

    [4] => Array
        (
            [countryid] => ID
            [countryname] => Indonesia
            [totalaccess] => 2
        )

    [5] => Array
        (
            [countryid] => ID
            [countryname] => Indonesia
            [totalaccess] => 1
        )

)

di group berdasarkan countryid dan di count totalaccess nya, sehingga menjadi

Array
(
    [ID] => Array
        (
            [countryid] => ID
            [countryname] => Indonesia
            [totalaccess] => 41
        )

    [US] => Array
        (
            [countryid] => US
            [countryname] => United States
            [totalaccess] => 23
        )

)

group menggunakan fungsi sebagai berikut :

function groupArray($result, $groupkey, $countkey)
{
	$finalresult = array();
	foreach($result as $res) {
		$key = $res[$groupkey];

		if(!isset($finalresult[$key])){
			$finalresult[$key] = $res;
		} else {
			$finalresult[$key][$countkey] = $finalresult[$key][$countkey] + $res[$countkey];
		}
	}
	return $finalresult;
}

kemudian di sort berdasarkan totalaccess

Array
(
    [0] => Array
        (
            [countryid] => US
            [countryname] => United States
            [totalaccess] => 23
        )

    [1] => Array
        (
            [countryid] => ID
            [countryname] => Indonesia
            [totalaccess] => 41
        )

)

sort menggunakan fungsi sebagai berikut :

function sortArray($a, $sortkey, $mode = "ASC")
{
	foreach($a as $k=>$v) {
		$b[$k] = strtolower($v[$sortkey]);
	}

	if($mode == "ASC") asort($b);
	else arsort($b);

	foreach($b as $key=>$val) {
		$c[] = $a[$key];
	}
	return $c;
}