how to sum of two multidimensional array? - php

Question

I am new in php. i need sum of two arrays but not getting right output.my arrays are coming in this way.
this is my first array.
Array
(
[1] => Array
(
[1] => Array
(
[-10] => 21787048.7293
[-5] => 21816115.9548
[-1] => 21839369.7352
[0] => 21845183.1803
[1] => 21850996.6254
[5] => 21874250.4058
[10] => 21903317.6313
)
)
[2] => Array
(
[2] => Array
(
[-10] => 21147607.6407
[-5] => 21496395.4105
[-1] => 21775425.6263
[0] => 21845183.1803
[1] => 21914940.7343
[5] => 22193970.9501
[10] => 22542758.7199
)
)
)
and this is second array.
Array
(
[1] => Array
(
[1] => Array
(
[-10] => 26101989.9443
[-5] => 26131057.1698
[-1] => 26154310.9501
[0] => 26160124.3952
[1] => 26165937.8403
[5] => 26189191.6207
[10] => 26218258.8462
)
)
[2] => Array
(
[2] => Array
(
[-10] => 25462548.8556
[-5] => 25811336.6254
[-1] => 26090366.8413
[0] => 26160124.3952
[1] => 26229881.9492
[5] => 26508912.1651
[10] => 26857699.9349
)
)
)
i need sum of these two arrays by keys.please help me out.
this is my code.my two arrays are $pretax_income, $earning.
foreach($pretax_income as $k=>$value)
{
foreach($value as $v=>$val)
{
foreach($val as $u=>$valArr) {
$comboarray[$elno] = $valArr[$k][$v][$u] + $earning[$k][$v][$u];
}
}
} print_r($comboarray);

Answer 1

function sum()
{
$identicalKeysArrays = func_get_args();
if (is_array($identicalKeysArrays[0])) {
$result = call_user_func_array('sum', array_map(function ($array) {
return $array[0];
}, $identicalKeysArrays));
if ($result) {
return $result;
}
}
if ($identicalKeysArrays[0]) {
$summed = array();
foreach ($identicalKeysArrays as $array) {
foreach ($array as $key => $value) {
$summed[$key] = ($summed[$key] ? $summed[$key] : 0) + $value;
}
}
return $summed;
}
}
$a = array(array(
'-1' => 23,
'2' => 2
));
$b = array(array(
'-1' => 3
));
var_dump(sum($a, $b));
Result:
array(2) { [-1]=> int(26) [2]=> int(2) }

Answer 2

Maybe something like this?
foreach($pretax_income as $key1=>$val1){
foreach($val1 as $key2=>$val2){
foreach($val2 as $key3=>$val3){
$comboarray[$key1][$key2][$key3]=$pretax_income[$key1][$key2][$key3]+$earning[$key1][$key2][$key3];
}
}
}