Array sorting functions written a long time ago, don't know why... Maybe to find the ugliest possible way.

sortArrayByArray.php

<?php
$array = [
    9843 => [
        'name' => 'Bob',
        'order' => '2',
    ],
    98723 => [
        'name' => 'Creg',
        'order' => '1',
    ],
    87934 => [
        'name' => 'Bobby',
        'order' => '2',
    ],
    365 => [
        'name' => 'Carl',
        'order' => '1',
    ],
];

$orderBy = [
    'order' => SORT_ASC,
    'name' => SORT_DESC,
];

function sortArrayBy(&$array, $orderBy)
{
    call_user_func_array(
        'array_multisort',
        ($result = call_user_func(
            function ($array, $orderBy) {
                $result = [];
                for ($i = 0, $j = count($values = array_map(function ($index) use ($array, $orderBy, $i, &$params) {
                        $params[$i . '-' . $index . 'Order'] = $orderBy[$index];
                        return array_map(function ($item) use ($index) {
                            return $item[$index];
                        }, array_values($array));
                }, array_combine(($keys = array_keys($orderBy)), $keys))) * 2; $i < $j; $i++) {
                    array_push($result, array_values(($i % 2) ? $params : $values)[(int)($i / 2)]);
                }
                return $result;
            },
            $array,
            $orderBy
        )) + [count($result) + 1 => &$array]
    );
}

function sortArrayFe(&$array, $orderBy)
{
    $params = [];
    foreach (array_keys($orderBy) as $key) {
        foreach ($array as $item) {
            $params[$key][] = $item[$key];
        }
        $params[] = $orderBy[$key];
    }
    $params[] = &$array;
    call_user_func_array('array_multisort', $params);
}