[英]How to group an array based on values
我有一個多維數組,我想根據第二個鍵對其進行分組。
例如我有一個數組輸出如下:
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
)
)
從上面的數組輸出。 如果有一點能力將輸出更改為如下可能是可能的:
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
)
我嘗試了幾種方法,但可能因為我只是一個初學者,我一直無法找到解決方案。 請幫助朋友
您可以使用foreach
$r= [];
foreach($a as $k => $v){
foreach($v as $k1 => $v1){
$r[$k1][$k] = $v1;
}
}
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