排序关联数组PHP

Question

这是我的数组,如何通过saleref对其进行排序？

Array
(
    [xml] => Array
        (
            [sale] => Array
                (
                    [0] => Array
                        (
                            [saleref] =>  12345
                            [saleline] =>   1
                            [product] => producta
                            [date] => 19/ 3/10
                            [manifest] =>       0
                            [qty] =>     1
                            [nextday] => 
                            [order_status] => 
                        )

                    [1] => Array
                        (
                            [saleref] =>  12344
                            [saleline] =>   1
                            [product] => productb
                            [date] => 18/ 3/10
                            [manifest] =>   11892
                            [qty] =>     1
                            [nextday] => 
                            [order_status] => 
                        )

Answer 1

function cmp($a, $b) {
    if ($a['saleref'] == $b['saleref']) {
        return 0;
    }
    return ($a['saleref'] < $b['saleref']) ? -1 : 1;
}

uasort($array['xml']['sale'], 'cmp');