如何在 PHP 上对键不是字符串标签的多维数组进行排序 [英] How to sort a multidimensional array on PHP where keys are not string labels

问题描述

我有这个多维数组:

$serviceTimes = Array (
  [0] => Array ( [0] => PM1900 [1] => 7:00pm )
  [1] => Array ( [0] => PM1900 [1] => 7:00pm )
  [2] => Array ( [0] => PM1415 [1] => 2:15pm )
  [3] => Array ( [0] => PM1919 [1] => 7:19pm )
  [6] => Array ( [0] => PM2020 [1] => 8:20pm )
)

但是我无法在 [0] 元素上对数组进行排序.这不起作用:

But I am unable to sort the array on the [0] element. This does not work:

array_multisort( $serviceTimes[0], SORT_ASC, $serviceTimes );

这也不行

array_multisort( $serviceTimes[][0], SORT_ASC, $serviceTimes );

有什么想法吗?

理想和最终，这就是我想要制作的:

Ideally and ultimately, this is what I am looking to produce:

Array (
  [0] => 2:15pm )
  [1] => 7:00pm )
  [2] => 7:00pm )
  [3] => 7:19pm )
  [4] => 8:20pm )
)

推荐答案

使用 array_column 从子数组中提取 0 列并对其进行排序:

Use array_column to extract the 0 column from the sub-arrays and sort on that:

array_multisort(array_column($serviceTimes, 0), SORT_ASC, $serviceTimes);

您声明对 0 元素进行排序，但您的输出显示来自 1 元素的时间.如果是这样，只需将 array_column 参数更改为 1.

You state sorting on the 0 element but your output shows times from the 1 element. If so just change the array_column argument to a 1.

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