将多个数组放在一个大的关联数组中

Question

I am creating a set of arrays with the following loop:

$assessmentArr = explode("&", $assessmentData);

foreach($assessmentArr as $data) {
    $fullArr = explode("_", $data);

    // Break down to only archetype and value
    $resultArr = explode("=", $fullArr[2]);

    //print_r($resultArr);
}

Which produces the following results:

Array
(
    [0] => community-support
    [1] => 24
)
Array
(
    [0] => money-rewards
    [1] => 30
)
Array
(
    [0] => status-stability
    [1] => 15
)
Array
(
    [0] => personal-professional-development
    [1] => 32
)
Array
(
    [0] => community-support
    [1] => 9
)
Array
(
    [0] => money-rewards
    [1] => 12
)
Array
(
    [0] => status-stability
    [1] => 16
)
Array
(
    [0] => personal-professional-development
    [1] => 29
)

I need to combine these into one array, and where the [0] value matches, I need to add the [1] value together.

So I would like the final output to be something like:

Array
(
    [community-support] => 33
    [money-rewards] => 42
    [status-stability] => 31
    [personal-professional-development] => 61
)

I found this question: How to merge two arrays by summing the merged values which will assist me in merging and adding the values together, but I'm not sure how to go about it when the arrays aren't assigned to a variable. Is what I am trying to do possible or am I going about this the wrong way?

Answer 1

Don't make it complicated, just check if the results array already has an element with that key and if not initialize it otherwise add it. E.g.

(Add this code in your loop):

if(!isset($result[$resultArr[0]]))
    $result[$resultArr[0]] = $resultArr[1];
else
    $result[$resultArr[0]] += $resultArr[1];

Then you have your desired array:

print_r($result);