php - How to sum (sub total) array based on two keys? -


i have array below values

 array (     [0] => array         (             [order_date] => 2016-01-01             [sku] => rk101             [qty] => 2         )      [1] => array         (             [order_date] => 2016-01-01             [sku] => rk101             [qty] => 5         )      [2] => array         (             [order_date] => 2016-01-01             [sku] => rk102             [qty] => 4         )      [3] => array         (             [order_date] => 2016-01-02             [sku] => rk101             [qty] => 2         )      [4] => array         (             [order_date] => 2016-01-02             [sku] => rk101             [qty] => 2         ) )

and want sum array, first date , sku, want result below

    array (     [2016-01-01] => array     (         [rk101] => array         (             [qty] => 7         )         [rk102] => array         (             [qty] => 4         )     )     [2016-01-01] => array     (         [rk101] => array         (             [qty] => 4         )     ) )

i have explore stack overflow , found many post calculates sum based on 1 key, in case want sum array values based on date first , sku. please same

try below solution:

<?php echo '<pre>';  $array = array (     '0' => array     (         'order_date' => '2016-01-01',         'sku' => 'rk101',         'qty' => 2     ),      '1' => array     (         'order_date' => '2016-01-01',         'sku' => 'rk101',         'qty' => 5     ),      '2' => array     (         'order_date' => '2016-01-01',         'sku' => 'rk102',         'qty' => 4     ),      '3' => array     (         'order_date' => '2016-01-02',         'sku' => 'rk101',         'qty' => 2     ),      '4' => array     (         'order_date' => '2016-01-02',         'sku' => 'rk101',         'qty' => 2     ) );  $new_array = array(); foreach ($array $a) {     if (!isset($new_array[$a['order_date']][$a['sku']]['qty'])) {         $new_array[$a['order_date']][$a['sku']]['qty'] = 0;     }     $new_array[$a['order_date']][$a['sku']]['qty'] += $a['qty']; }  print_r($new_array);

output:

array (     [2016-01-01] => array         (             [rk101] => array                 (                     [qty] => 7                 )              [rk102] => array                 (                     [qty] => 4                 )          )      [2016-01-02] => array         (             [rk101] => array                 (                     [qty] => 4                 )          )  )

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