Question

我想在不丢失密钥的情况下对数组进行排序。我在stackoverflow上阅读了许多类似的问题，但没有一个处理日期作为密钥。希望有人可以帮助我！

这是我想要排序的数组。

$data = array (
  'October 8, 2015' => 
  array (
    'admin' => 
    array (
      'checkin' => 1,
      'checkout' => 0,
    ),
  ),
  'September 8, 2015' => 
  array (
    'admin' => 
    array (
      'checkin' => 1,
      'checkout' => 0,
    ),
  ),
  'September 7, 2015' => 
  array (
    'admin' => 
    array (
      'checkin' => 1,
      'checkout' => 1,
    ),
  ),
  'September 6, 2015' => 
  array (
    'admin' => 
    array (
      'checkin' => 2,
      'checkout' => 2,
    ),
  ),
  'September 5, 2015' => 
  array (
    'admin' => 
    array (
      'checkin' => 1,
      'checkout' => 1,
    ),
  ),
  'September 4, 2015' => 
  array (
    'admin' => 
    array (
      'checkin' => 1,
      'checkout' => 1,
    ),
  ),
  'September 3, 2015' => 
  array (
    'admin' => 
    array (
      'checkin' => 2,
      'checkout' => 2,
    ),
  ),
  'September 2, 2015' => 
  array (
    'admin' => 
    array (
      'checkin' => 2,
      'checkout' => 1,
    ),
  ),
);

Answer 1

使用uksort。你可以自己做比较功能。在那里你可以将密钥转换为时间戳并进行比较。

您可以更改订单方向

return $a > $b; // order ASC
return $a < $b; // order DESC

您的代码应如下所示：

function cmp($a, $b)
{
    $a = strtotime($a);
    $b = strtotime($b);
    return $a > $b;
}

uksort($data, "cmp");

参见 DEMO

<强>输出

Array
(
    [September 2, 2015] => Array
        (
            [admin] => Array
                (
                    [checkin] => 2
                    [checkout] => 1
                )

        )

    [September 3, 2015] => Array
        (
            [admin] => Array
                (
                    [checkin] => 2
                    [checkout] => 2
                )

        )

    [September 4, 2015] => Array
        (
            [admin] => Array
                (
                    [checkin] => 1
                    [checkout] => 1
                )

        )

    [September 5, 2015] => Array
        (
            [admin] => Array
                (
                    [checkin] => 1
                    [checkout] => 1
                )

        )

    [September 6, 2015] => Array
        (
            [admin] => Array
                (
                    [checkin] => 2
                    [checkout] => 2
                )

        )

    [September 7, 2015] => Array
        (
            [admin] => Array
                (
                    [checkin] => 1
                    [checkout] => 1
                )

        )

    [September 8, 2015] => Array
        (
            [admin] => Array
                (
                    [checkin] => 1
                    [checkout] => 0
                )

        )

    [October 8, 2015] => Array
        (
            [admin] => Array
                (
                    [checkin] => 1
                    [checkout] => 0
                )

        )

)

如何按日期对多维数组进行排序？

1 个答案: