CODEWITHSUNDEEP
phparraysmultidimensional-arraygroupingfallbackvalue
Divyesh Jesadiya
Divyesh Jesadiya

Reputation: 957

Group rows of two 2d arrays by a shared column and add default values where no data is available

I have two two-dimensional arrays like

Array
(
[0] => Array
    (
        [0] => 2022-01-19
        [1] => 6
    )
[1] => Array
    (
        [0] => 2022-01-20
        [1] => 1
    )
[2] => Array
    (
        [0] => 2022-01-21
        [1] => 1
    )
[3] => Array
    (
        [0] => 2022-01-22
        [1] => 2
    )
)

and

Array
(
[0] => Array
    (
        [0] => 2022-01-17
        [1] => 6
    )
[1] => Array
    (
        [0] => 2022-01-18
        [1] => 1
    )
[2] => Array
    (
        [0] => 2022-01-21
        [1] => 1
    )
[3] => Array
    (
        [0] => 2022-01-23
        [1] => 2
    )
)

I need to merge them on related date values and I want the following result:

Array
(
[0] => Array
    (
        [0] => 2022-01-17
        [1] => 0
        [2] => 6
    )
[1] => Array
    (
        [0] => 2022-01-18
        [1] => 0
        [2] => 1
    )
[2] => Array
    (
        [0] => 2022-01-19
        [1] => 6
        [2] => 0
    )
[3] => Array
    (
        [0] => 2022-01-20
        [1] => 1
        [2] => 0
    )
[4] => Array
    (
        [0] => 2022-01-21
        [1] => 1
        [2] => 1
    )
[5] => Array
    (
        [0] => 2022-01-22
        [1] => 2
        [2] => 0
    )
[6] => Array
    (
        [0] => 2022-01-23
        [1] => 0
        [2] => 2
    )
)

I tried with the below code but not any success.

$final_array = [];
foreach ($openTicket as $val) {
    $closeTicketNo = 0;
    foreach ($closeTicket as $value) {
        if ($val[0] == $value[0]) {
            $closeTicketNo = $value[1];
        }
    }
    $final_array[] = [$val[0], $val[1], $closeTicketNo];
}

I get all the elements from the $openTicket but not get all the elements from a $closeTicket to my result array $final_array

Upvotes: 0

Views: 75

Answers (2)

Ishaque Javed
Ishaque Javed

Reputation: 406

You can try like this

$array1 = [
    ['2022-01-19',6],
    ['2022-01-20',1],
    ['2022-01-21',0]
];

$array2 = [
    ['2022-01-17',6],
    ['2022-01-20',2],
    ['2022-01-21',1]
];


function mergeMultiple($array1,$array2){
    foreach($array1 as $item1){
        $mergedArray[$item1[0]] = $item1;
    }

    foreach($array2 as $item2){
        if(isset($mergedArray[$item2[0]])){
             array_push($mergedArray[$item2[0]],$item2[1]);
             $mergedArray[$item2[0]] = $mergedArray[$item2[0]];
        }else{
          $mergedArray[$item2[0]] = $item2;
        }
    }

    return array_values($mergedArray);
}

$mergedArray = mergeMultiple($array1,$array2);
ksort($mergedArray);
print_r($mergedArray);

Upvotes: 1

Nigel Ren
Nigel Ren

Reputation: 57131

This code first finds all of the unique dates (using array_unique) from the first values in each array (array_column fetches the values and array_merge puts them into 1 array).

Then it indexes each array by the dates (using array_column again).

Finally looping through the unique dates and adding a new element to the output with the values (using ?? 0 so that if no value is present the array is still filled properly)...

$dates = array_unique(array_merge(array_column($openTicket, 0), array_column($closedTicket, 0)));
$open = array_column($openTicket, 1, 0);
$closed = array_column($closedTicket, 1, 0);
$finalArray = [];
foreach ($dates as $date) {
    $finalArray[] = [$date, $open[$date] ?? 0, $closed[$date] ?? 0];
}

Upvotes: 2

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