我有一个多维数组，我想根据第二个键对其进行分组。
例如我有一个数组输出如下：
Array
(
[1] => Array
(
[1] => 48.083261120685
)
[2] => Array
(
[3] => 40.509258201058
)
[3] => Array
(
[2] => 38.262252939418
)
[4] => Array
(
[3] => 42.296571965113
)
[5] => Array
(
[3] => 4.5825756949558
)
[6] => Array
(
[3] => 186.7110066386
)
[7] => Array
(
[3] => 149.29835899969
)
[8] => Array
(
[2] => 47.053161424074
)
[9] => Array
(
[2] => 15.58845726812
)
[10] => Array
(
[2] => 6.164414002969
)
[11] => Array
(
[1] => 4.5825756949558
)
[12] => Array
(
[2] => 42.0119030752
)
[13] => Array
(
[1] => 52.886671288709
)
[14] => Array
(
[1] => 65.222695436481
)
)
从上面的数组输出。如果有一点能力将输出更改为如下可能是可能的：
Array
(
[1] => Array
(
[1] => 48.083261120685,
[13] => 52.886671288709,
[14] => 65.222695436481
)
[2] => Array (
[3] => 38.262252939418,
[8] => 47.053161424074,
[9] => 15.58845726812,
[10] => 6.164414002969,
[12] => 42.0119030752
)
我尝试了几种方法，但可能因为我只是一个初学者，我一直无法找到解决方案。请帮助朋友
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