PHP; Iterate through an assoc. array and add together all values - php

Question

I have an array that I need to 'merge' the values of, and then flatten the entire thing to not be associative. I have this working, but I was hoping to find a better way.
Here's, in essence, the array:
array (
[label] => array(
[0] => array(
key => val
)
[1] => array(
key => val
)
)
[label2] => array(
[0] => array(
key => val
)
)
What I do with this is to add all values from [0] and [1] per assoc. array and return 1 array, where the output is something like:
array (
[label] => array(
[0] => array(
key => SUM(val1+val2)
)
)
[label2] => array(
[0] => array(
key => val
)
)
I do this by:
$i = array();
foreach ($array AS $key => $val) {
$i[$key] = NULL;
foreach ($val AS $r) foreach ($r AS $k => $v) {
if (count($array[$key]) > 1) { // Add value.
$i[$key][$k] += $v;
} else { // Leave alone.
$i[$key][$k] = $v;
}
}
}
Then I flatten it into one big array by using:
$array = array();
$r = new RecursiveIteratorIterator(
new RecursiveArrayIterator($array)
);
foreach ($r as $key => $val)
$array[$key] = $val;
return $array
I think this is ugly and could be done in a much more efficient way. I just can't figure it out, and SPL confuses me; but I want to learn.
Can someone help?
I think I figured it out:
$data = array();
$RII = new RecursiveIteratorIterator(
new RecursiveArrayIterator($it)
);
foreach($RII AS $key => $val) {
$data[$RII->key()] += $RII->current();
}
$this->fullData = $data;
Did everything I needed to in less code. Does this look right?

Answer 1

$data = array();
$RII = new RecursiveIteratorIterator(
new RecursiveArrayIterator($it)
);
foreach($RII AS $key => $val) {
$data[$RII->key()] += $RII->current();
}
$this->fullData = $data;
Replaces both functions above. It goes through the multidimensional array without question and allows me to do what I needed to do.