Question

我有一个数组，但我想从那个数组生成其他数组..

    Array
    (
        [0] => Array
            (
                [supplier] => Billy 
                [total_bookings] => 5
                [year] => 2016
                [month] => 6
                [user_id] => 4
                [sales_revenue] => 1180
                [net_revenue] => 1180
            )

    [1] => Array
        (
            [supplier] => XYZ1
            [total_bookings] => 3
            [year] => 2016
            [month] => 6
            [user_id] => 2
            [sales_revenue] => 642
            [net_revenue] => 642
        )

    [2] => Array
        (
            [supplier] => Billy 
            [total_bookings] => 1
            [year] => 2016
            [month] => 3
            [user_id] => 4
            [sales_revenue] => 30
            [net_revenue] => 30
        )

    [3] => Array
        (
            [supplier] => Billy 
            [total_bookings] => 1
            [year] => 2015
            [month] => 10
            [user_id] => 4
            [sales_revenue] => 30
            [net_revenue] => 30
        )

)

到新阵列：

      Array
    (
        [2016] => Array(
     [6] => Array
        (

           [0] => Array( 

            [supplier] => Billy 
            [total_bookings] => 5
            [user_id] => 4
            [sales_revenue] => 1180
            [net_revenue] => 1180
          ) 

          [1] => Array
            (
                [supplier] => XYZ1
                [total_bookings] => 3
                [user_id] => 2
                [sales_revenue] => 642
                [net_revenue] => 642
            )

        )

       [3] => Array
        (

           [0] => Array
            (
                [supplier] => Billy 
                [total_bookings] => 1
                [year] => 2016
                [month] => 3
                [user_id] => 4
                [sales_revenue] => 30
                [net_revenue] => 30
            )


        )  


    )

     [2015] => Array(

        [10] => Array
        (
            [supplier] => Billy 
            [total_bookings] => 1
            [user_id] => 4
            [sales_revenue] => 30
            [net_revenue] => 30
        )

     )

)

Answer 1

试试这个，让我知道：

$new_arr = array();
foreach($arr as $val){
    $temp = array('supplier' => $val['supplier'], 'total_bookings' => $val['total_bookings'], 'user_id' => $val['user_id'], 'sales_revenue' => $val['sales_revenue'], 'net_revenue' => $val['net_revenue']);
    array_push($new_arr[$val['year']][$val['month']], $temp);
}
print_r($new_arr);

Answer 2

使用array_fill_keys，array_column（自PHP 5.5开始提供），array_walk和array_diff_key函数的解决方案：

// supposing $arr is your initial array
$years = array_fill_keys(array_column($arr, 'year'), []);
array_walk($arr, function($v) use(&$years){
    if (key_exists($v['year'], $years)) {
        $years[$v['year']][$v['month']][] = array_diff_key($v, ['year'=>0, 'month'=>0]);
    }
});
print_r($years);

Answer 3

试试这个： -

$res = [];
foreach($array as $record){
  $year = $record['year'];
  $month = $record['month'];
  unset($record['year'],$record['month']);
  $res[$year][$month][] = $record;
}
echo '<pre>'; print_r($res);

如何从数组生成数组

3 个答案: