按日期（键）和时间（值）对多维数组进行排序

Question

假设下面的巨大数组（我故意没有删除它的任何记录，这样你就有了大量的数据，以防有人想深入挖掘并帮助我找到我的问题的解决方案):

$program = array (
  '2021-07-11' => 
  array (
    0 => 
    array (
      'movie' => 'Movie 1',
      'channel' => 'Channel 10',
      'time' => '23:00',
    ),
    1 => 
    array (
      'movie' => 'Movie 2',
      'channel' => 'Channel 2',
      'time' => '01:15',
    ),
    2 => 
    array (
      'movie' => 'Movie 8',
      'channel' => 'Channel 4',
      'time' => '11:00',
    ),
    3 => 
    array (
      'movie' => 'Movie 12',
      'channel' => 'Channel 11',
      'time' => '17:30',
    ),
    4 => 
    array (
      'movie' => 'Movie 14',
      'channel' => 'Channel 5',
      'time' => '21:00',
    ),
    5 => 
    array (
      'movie' => 'Movie 15',
      'channel' => 'Channel 5',
      'time' => '02:20',
    ),
    6 => 
    array (
      'movie' => 'Movie 17',
      'channel' => 'Channel 11',
      'time' => '17:30',
    ),
    7 => 
    array (
      'movie' => 'Movie 19',
      'channel' => 'Channel 5',
      'time' => '10:00',
    ),
    8 => 
    array (
      'movie' => 'Movie 21',
      'channel' => 'Channel 8',
      'time' => '1:20',
    ),
    9 => 
    array (
      'movie' => 'Movie 33',
      'channel' => 'Channel 5',
      'time' => '00:20',
    ),
    10 => 
    array (
      'movie' => 'Movie 39',
      'channel' => 'Channel 3',
      'time' => '17:30',
    ),
    11 => 
    array (
      'movie' => 'Movie 40',
      'channel' => 'Channel 3',
      'time' => '22:00',
    ),
    12 => 
    array (
      'movie' => 'Movie 41',
      'channel' => 'Channel 5',
      'time' => '14:00',
    ),
    13 => 
    array (
      'movie' => 'Movie 42',
      'channel' => 'Channel 5',
      'time' => '23:00',
    ),
    14 => 
    array (
      'movie' => 'Movie 43',
      'channel' => 'Channel 2',
      'time' => '14:15',
    ),
    15 => 
    array (
      'movie' => 'Movie 44',
      'channel' => 'Channel 2',
      'time' => '18:00',
    ),
    16 => 
    array (
      'movie' => 'Movie 45',
      'channel' => 'Channel 2',
      'time' => '23:45',
    ),
    17 => 
    array (
      'movie' => 'Movie 46',
      'channel' => 'Channel 1',
      'time' => '22:00',
    ),
    18 => 
    array (
      'movie' => 'Movie 47',
      'channel' => 'Channel 6',
      'time' => '21:10',
    ),
  ),
  '2021-07-10' => 
  array (
    0 => 
    array (
      'movie' => 'Movie 3',
      'channel' => 'Channel 2',
      'time' => '14:15',
    ),
    1 => 
    array (
      'movie' => 'Movie 5',
      'channel' => 'Channel 3',
      'time' => '22:00',
    ),
    2 => 
    array (
      'movie' => 'Movie 6',
      'channel' => 'Channel 11',
      'time' => '23:00',
    ),
    3 => 
    array (
      'movie' => 'Movie 7',
      'channel' => 'Channel 4',
      'time' => '11:15',
    ),
    4 => 
    array (
      'movie' => 'Movie 11',
      'channel' => 'Channel 4',
      'time' => '21:00',
    ),
    5 => 
    array (
      'movie' => 'Movie 16',
      'channel' => 'Channel 2',
      'time' => '23:45',
    ),
    6 => 
    array (
      'movie' => 'Movie 20',
      'channel' => 'Channel 4',
      'time' => '23:00',
    ),
    7 => 
    array (
      'movie' => 'Movie 23',
      'channel' => 'Channel 5',
      'time' => '01:00',
    ),
    8 => 
    array (
      'movie' => 'Movie 27',
      'channel' => 'Channel 4',
      'time' => '01:00',
    ),
    9 => 
    array (
      'movie' => 'Movie 29',
      'channel' => 'Channel 7',
      'time' => '02:15',
    ),
    10 => 
    array (
      'movie' => 'Movie 31',
      'channel' => 'Channel 5',
      'time' => '14:00',
    ),
    11 => 
    array (
      'movie' => 'Movie 32',
      'channel' => 'Channel 5',
      'time' => '22:10',
    ),
    12 => 
    array (
      'movie' => 'Movie 36',
      'channel' => 'Channel 2',
      'time' => '00:01',
    ),
    13 => 
    array (
      'movie' => 'Movie 37',
      'channel' => 'Channel 2',
      'time' => '11:30',
    ),
    14 => 
    array (
      'movie' => 'Movie 38',
      'channel' => 'Channel 6',
      'time' => '22:30',
    ),
  ),
  '2021-07-09' => 
  array (
    0 => 
    array (
      'movie' => 'Movie 4',
      'channel' => 'Channel 5',
      'time' => '21:00',
    ),
    1 => 
    array (
      'movie' => 'Movie 9',
      'channel' => 'Channel 11',
      'time' => '22:00',
    ),
    2 => 
    array (
      'movie' => 'Movie 10',
      'channel' => 'Channel 9',
      'time' => '16:45',
    ),
    3 => 
    array (
      'movie' => 'Movie 18',
      'channel' => 'Channel 7',
      'time' => '22:00',
    ),
    4 => 
    array (
      'movie' => 'Movie 22',
      'channel' => 'Channel 5',
      'time' => '23:00',
    ),
    5 => 
    array (
      'movie' => 'Movie 24',
      'channel' => 'Channel 9',
      'time' => '21:00',
    ),
    6 => 
    array (
      'movie' => 'Movie 25',
      'channel' => 'Channel 9',
      'time' => '23:00',
    ),
    7 => 
    array (
      'movie' => 'Movie 26',
      'channel' => 'Channel 4',
      'time' => '21:00',
    ),
    8 => 
    array (
      'movie' => 'Movie 28',
      'channel' => 'Channel 8',
      'time' => '23:00',
    ),
    9 => 
    array (
      'movie' => 'Movie 30',
      'channel' => 'Channel 6',
      'time' => '23:45',
    ),
    10 => 
    array (
      'movie' => 'Movie 34',
      'channel' => 'Channel 3',
      'time' => '23:00',
    ),
    11 => 
    array (
      'movie' => 'Movie 35',
      'channel' => 'Channel 2',
      'time' => '22:00',
    ),
  ),
  '2021-07-12' => 
  array (
    0 => 
    array (
      'movie' => 'Movie 13',
      'channel' => 'Channel 5',
      'time' => '01:20',
    ),
  ),
)

我想按日期（第一维的键）和第三维的列 time 对这个数组进行排序，这样我就得到了一个按日期分组的电影列表，并按播放时间排序...

第一个任务是超级简单的一行...

array_multisort(array_map('strtotime', array_keys($program)), SORT_ASC, $program);

然而，第二个任务让我很难以类似的优雅方式实现...我尝试的是：

array_multisort(array_map('strtotime', array_keys($program)), SORT_ASC, array_column($program, 'time'), SORT_ASC, $program);

但由于某些原因这不起作用 array_column($program, 'time') returns 一个空数组。在 manual 中明确指出数组可以是 一个多维数组或一个对象数组，从中提取一列值。 所以它可以是一个多维，不是严格意义上的二维数组...为什么它在我的情况下不起作用？我错过了什么？

我想到的是多维数组不能是关联数组，所以为了暂时去掉日期键，我把上面改成了：

array_multisort(array_map('strtotime', array_keys($program)), SORT_ASC, array_column(array_values($program), 'time'), SORT_ASC, $program);

但不幸的是这也不起作用...

我正在努力以 smart/elegant 的方式做到这一点并避免使用循环遍历每个值，但我运行没有想法。因此，我们将不胜感激任何帮助。 TIA.

Answer 1

好的，我找到了！！！我需要遍历初始数组的每个子数组（通过引用），并在其中执行 array_multisort ...所以下面的代码成功了，我想它已经尽可能优雅了！ !!

array_multisort(array_map('strtotime', array_keys($program)), SORT_ASC, $program);

foreach ($program as &$day) {
    array_multisort(array_column($day, 'time'), SORT_ASC, $day);
}

按日期（键）和时间（值）对多维数组进行排序

Sort multi-dimensional array by date (keys) and time (values)

php

sorting

array-multisort