Question

I have two array which i want to merge in a specific way in php.
So i need your help in helping me with it as i tried and failed.

So say i have two arrays:

$array1= array(
    "foo"        => 3,
    "bar"        => 2,
    "random1"    => 4,
);

$array2= array(
    "random2"    => 3,
    "random3"    => 4,
    "foo"        => 6,
);

Now when during merging i would like the common key’s values to be added.
So like foo exists in array1 and in array2 so when merging array1 with array 2 i should get "foo" => "9"

I better illustration would be the final array which looks like this:

$array1= array(
    "foo"        => 9,
    "bar"        => 2,
    "random1"    => 4,
    "random2"    => 3,
    "random3"    => 4,
);

So again i would like the values of the common keys to be added together and non common keys to be added to array or a new array

I hope i was clear enough

Thanks,
Vidhu

Answer 1

Something like that:

function mergeValues() {
    $result = array();
    $arraysToMerge = func_get_args();
    foreach ($arraysToMerge as $array) {
       foreach($array as $key => $value) {
           $result[$key] += $value;
       }
    }

    return $result;
}

$res = mergeValues($array1, $array2, $array3); // Can pass any ammount of arrays to a function.