如何從多維數組中的最高值和最低值和總和PHP

Question

我已經在這裏使用這個例子Return index of highest value in an array

嘗試，但不進入一多維數組

我已經試過ARRAY_COLUMN（） ，array_values（），array_shift，最大和最小，但他們沒有得到的信息，我需要

我希望能環通，並獲得：

[價格]

然後查看定價，看看哪些是最高和最低的嵌套數組中

所以像下面這總有人在上述日期

[2017-09-22] 
[2017-09-23] 

明顯最高和最低行業[2017-09 -23]是一個簡單的，我只是希望添加更多的代碼爲ppl幫助去通過。

我創建數組是這樣的：

Array 
    (
    [2017-09-23] => Array 
    (
     [0] => Array 
      (
       [timestamp] => 1506169387000 
       [pricing] => 9.5470 
       [qty] => 25 
       [total] => 238.675 
       [date] => 2017-09-23 
      ) 

    ) 

[2017-09-22] => Array 
    (
     [0] => Array 
      (
       [timestamp] => 1506093083000 
       [pricing] => 9.6300 
       [qty] => 25 
       [total] => 240.75 
       [date] => 2017-09-22 
      ) 

     [1] => Array 
      (
       [timestamp] => 1506077220000 
       [pricing] => 8.7190 
       [qty] => 13 
       [total] => 113.347 
       [date] => 2017-09-22 
      ) 

     [2] => Array 
      (
       [timestamp] => 1506077109000 
       [pricing] => 8.6800 
       [qty] => 83 
       [total] => 720.44 
       [date] => 2017-09-22 
      ) 

     [3] => Array 
      (
       [timestamp] => 1506065258000 
       [pricing] => 8.7100 
       [qty] => 25 
       [total] => 217.75 
       [date] => 2017-09-22 
      ) 

    ) 

在例如

上述，我想它創建只是一個新的數組以下

date -> last timestamp -> Highest pricing -> Lowest lowest -> Total of all Totals -> first Timestamp 

編輯：最後和第一次時間戳基本上是第一次也是最後一次索引，所以在這種情況下：

[timestamp] => 1506093083000 and [timestamp] => 1506065258000 

或索引[0]和索引[3]

Answer 1

從你的問題的陣列：

$array = array (
    '2017-09-23' => 
    array (
    0 => 
    array (
     'timestamp' => '1506169387000', 
     'pricing' => '9.5470', 
     'qty' => '25', 
     'total' => '238.675', 
     'date' => '2017-09-23', 
    ), 
), 
    '2017-09-22' => 
    array (
    0 => 
    array (
     'timestamp' => '1506093083000', 
     'pricing' => '9.6300', 
     'qty' => '25', 
     'total' => '240.75', 
     'date' => '2017-09-22', 
    ), 
    1 => 
    array (
     'timestamp' => '1506077220000', 
     'pricing' => '8.7190', 
     'qty' => '13', 
     'total' => '113.347', 
     'date' => '2017-09-22', 
    ), 
    2 => 
    array (
     'timestamp' => '1506077109000', 
     'pricing' => '8.6800', 
     'qty' => '83', 
     'total' => '720.44', 
     'date' => '2017-09-22', 
    ), 
    3 => 
    array (
     'timestamp' => '1506065258000', 
     'pricing' => '8.7100', 
     'qty' => '25', 
     'total' => '217.75', 
     'date' => '2017-09-22', 
    ), 
), 
); 

要得到的值也許你可以使用array_map以及與此功能array_column是一切的關鍵，試試這個：

$values = array_map(function($dates) { 
    $timestamps = array_column($dates, 'timestamp'); 
    $pricings = array_column($dates, 'pricing'); 
    return [ 
     'max_pricing' => max($pricings), 
     'lowest_pricing' => min($pricings), 
     'total_of_totals' => array_sum(array_column($dates, 'total')), 
     'first_timestamp' => reset($timestamps), 
     'last_timestamp' => end($timestamps), 
    ]; 
}, $array); 

$values是您需要的過濾器值的數組：

Array 
(
    [2017-09-23] => Array 
     (
      [max_pricing] => 9.5470 
      [lowest_pricing] => 9.5470 
      [total_of_totals] => 238.675 
      [first_timestamp] => 1506169387000 
      [last_timestamp] => 1506169387000 
     ) 

    [2017-09-22] => Array 
     (
      [max_pricing] => 9.6300 
      [lowest_pricing] => 8.6800 
      [total_of_totals] => 1292.287 
      [first_timestamp] => 1506093083000 
      [last_timestamp] => 1506065258000 
     ) 

) 

EDIT

獲取[first_timestamp]和[last_timestamp]

$values = array_map(function($dates) { 
    $timestamps = array_column($dates, 'timestamp'); 
    $pricings = array_column($dates, 'pricing'); 
    return [ 
     'max_pricing' => max($pricings), 
     'lowest_pricing' => min($pricings), 
     'total_of_totals' => array_sum(array_column($dates, 'total')), 
     'first_timestamp' => [ 
      'value' => reset($timestamps), 
      'pricing' => $pricings[each($timestamps)['key']] 
     ], 
     'last_timestamp' => [ 
      'value' => end($timestamps), 
      'pricing' => $pricings[each($timestamps)['key']] 
     ] 
    ]; 
}, $array); 

定價我添加了一個陣列到兩個時間戳與這些值和定價。

Array 
(
    [2017-09-23] => Array 
     (
      [max_pricing] => 9.5470 
      [lowest_pricing] => 9.5470 
      [total_of_totals] => 238.675 
      [first_timestamp] => Array 
       (
        [value] => 1506169387000 
        [pricing] => 9.5470 
       ) 

      [last_timestamp] => Array 
       (
        [value] => 1506169387000 
        [pricing] => 9.5470 
       ) 

     ) 

    [2017-09-22] => Array 
     (
      [max_pricing] => 9.6300 
      [lowest_pricing] => 8.6800 
      [total_of_totals] => 1292.287 
      [first_timestamp] => Array 
       (
        [value] => 1506093083000 
        [pricing] => 9.6300 
       ) 

      [last_timestamp] => Array 
       (
        [value] => 1506065258000 
        [pricing] => 8.7100 
       ) 

     ) 

)