combine the same values in array

Question

Help me pls combine array values. I have the same array: In my case i should save customers name like a key.

    Array
(
    [Test Name] => Array
        (
            [0] => Array
                (
                   [name] => 
                  banana
                    [id] => 
                  45002
                    [quantity] => 
                  10
                )
            [1] => Array
                (
                    [name] => 
                 banana
                    [id] => 
                 45002
                    [quantity] => 
                   20
                )
            [3] => Array
                (
                    [name] => 
                    apple 
                    [id] => 
                   23402
                    [qua] => 
                    1
                )

            [5] => Array
                (
                    [name] => 
                   cherry 
                    [id] => 
                   40017
                    [qua] => 
                   7
                )

How to get something like this:

Array
(
    [Test Name] => Array
        (
            [0] => Array
                (
                   [name] => 
                  banana
                    [id] => 
                  45002
                    [quantity] => 
                  30 // summ quantity but unique name and id 
                )
            [1] => Array
                (
                    [name] => 
                    apple 
                    [id] => 
                   23402
                    [qua] => 
                    1
                )

            [2] => Array
                (
                    [name] => 
                   cherry 
                    [id] => 
                   40017
                    [qua] => 
                   7
                )

In my case i should save customers name like a key. Then i will upload this on a table.

See here

fusion3k
– fusion3k

2016-05-05 10:47:21 +00:00
Commented May 5, 2016 at 10:47 — fusion3k
– fusion3k, Commented May 5, 2016 at 10:47
Hi. You need quantity & qua as different fields or same?

sujivasagam
– sujivasagam

2016-05-05 10:59:22 +00:00
Commented May 5, 2016 at 10:59 — sujivasagam
– sujivasagam, Commented May 5, 2016 at 10:59

Community · Accepted Answer · 2020-06-20 09:12:55Z

0

You can use array_map and array_reduce to accomplish it:

$results = array_map(function ($result) {
    return array_reduce($result, function ($carry, $item) {
        if (isset($carry[$item['id']])) {
            $carry[$item['id']]['quantity'] += $item['quantity'];
        } else {
            $carry[$item['id']] = $item;
        }
        return $carry;
    }, array());
}, $results);

From the documentation:

array_map() returns an array containing all the elements of array1 after applying the callback function to each one.

array_reduce() applies iteratively the callback function to the elements of the array, so as to reduce the array to a single value.

In our case the callback given to the array_reduce function returns a final array which contains unique items by id.

edited Jun 20, 2020 at 9:12

CommunityBot

11 silver badge

answered May 5, 2016 at 11:52

Mihai Matei

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