PHP - How to merge Arrays having the same keys and neglect the different keys?

I am new in PHP and love to learn it. I want to merge two or more arrays having same keys only. And neglect the arrays whose keys are not in both the Arrays. Like

Here is the First Array :

Array
(
[1] => Array
    (
        [111] => 36265
    )

[2] => Array
    (
        [222] => 36265
    )

[3] => Array
    (
        [333] => 36265
    )
)

and Second Array as :

Array
(
[1] => Array
    (
        [444] => 36265
    )

[2] => Array
    (
        [555] => 36265
    )

[4] => Array
    (
        [666] => 36265
    )
)

And i want my result to be as :

Array
(
[1] => Array
    (
        [111] => 36265
        [444] => 36265
    )

[2] => Array
    (
        [222] => 36265
        [555] => 36265
    )

)

Neglecting the rest Array with key [3] & [4]....

So Please anyone tell me how to get this. I try out "array_merge_recursive()" but this one displays all keys. Thanks in advance.

---

You'd have to loop over one of the arrays, check for the existence of the current key in the other array, if it exists, merge them, eg:

$output = array();
foreach ($array1 as $key => $value) {
  if (array_key_exists($key, $array2)) {
    $output[$key] = $value + $array2[$key];
  }
}

Here's a demo