php - 根据排序二维数组

Question

我想根据字段年份对以下二维数组进行排序？

Array
(

[0] => Array
(
    [from] => 44.91
    [to] => 53.56
    [next] => 108.88
    [year] => 2011

), 
[1] => Array
(
    [from] => 44.44
    [next] => 53.16
    [year] => 2010

), 
[2] => Array
(
    [from] => 42.83
    [next] => 51.36
    [year] => 2012
)
);

所以想要的结果是：

Array
(
[1] => Array
(
    [from] => 44.44
    [next] => 53.16
    [year] => 2010

), 
[0] => Array
(
    [from] => 44.91
    [to] => 53.56
    [next] => 108.88
    [year] => 2011

),
[2] => Array
(
    [from] => 42.83
    [next] => 51.36
    [year] => 2012
)
);

Answer 1

你试过使用uasort()吗？

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

uasort($your_array, 'cmp_year');

Answer 2

您可以使用array_multisort().

foreach ($arr as $k => $v) {
  $years[$k] = $v['year'];
}

array_multisort($years, SORT_DESC, $arr);