在php中对多维数组进行排序和分组

Question

我需要一些帮助在php中排序多维数组。我需要将数组分成几个月，然后按月排序。下面是我的原始数组：

Array
(
    [0] => Array
        (
            [IdEvent] => 5
            [EventName] => Copy of Opening snow weekend
            [Year] => 2011
            [Month] => 08
        )

    [1] => Array
        (
            [IdEvent] => 7
            [EventName] => Copy of Copy of Opening snow weekend
            [Year] => 2011
            [Month] => 07
        )

    [2] => Array
        (
            [IdEvent] => 1
            [EventName] => Opening snow weekend
            [Year] => 2011
            [Month] => 05
        )

    [3] => Array
        (
            [IdEvent] => 6
            [EventName] => Copy of Opening snow weekend
            [Year] => 2011
            [Month] => 05
        )

)

这是我希望得到的：

Array
(

    [0] => Array (

        [0] => Array
            (
                [IdEvent] => 1
                [EventName] => Opening snow weekend
                [Year] => 2011
                [Month] => 05
            )

        [1] => Array
            (
                [IdEvent] => 6
                [EventName] => Copy of Opening snow weekend
                [Year] => 2011
                [Month] => 05
            )

    )

    [1] => Array (

        [0] => Array
            (
                [IdEvent] => 7
                [EventName] => Copy of Copy of Opening snow weekend
                [Year] => 2011
                [Month] => 07
            )

    )

    [2] => Array (

        [0] => Array
            (
                [IdEvent] => 5
                [EventName] => Copy of Opening snow weekend
                [Year] => 2011
                [Month] => 08
            )
    )

)

Answer 1

我会为每个月容器使用一个容易排序的键，然后使用ksort

$months = array();
foreach ($input_array AS $arr) {
  $months[$arr['Month']][] = $arr;
}
ksort($months);

如果需要，可以使用array_values将其转换为标准的整数键数组

Answer 2

也许，就像这样：

$sortedArray = array();

foreach ($unsortedArray as $key => $row) {
  $month[$key] = $row['month'];
  $year[$key]  = $row['year'];
}

$sortedArray =  array_multisort($year, SORT_ASC, $month, SORT_ASC, $unsortedArray);

• 完全没有尝试过，没有测试过，经验丰富，从我的头顶开始。
• 你可能需要SORT_NUMERIC而不是SORT_ASC，我不确定。