want to add multidimensional array in php

Question

I have two multi dimensional array.If the key is same then i want to get the sum how do i do that. one is-

Array
(
    [2018-08-02] => Array
        (
            [male] => 1
            [female] => 0
        )



    [2018-08-07] => Array
        (
            [male] => 1
            [female] => 0
        )

   [2018-08-09] => Array
        (
            [male] => 1
            [female] => 5
        )

)

2nd one is- one is-

Array
(
    [2018-08-02] => Array
        (
            [male] => 3
            [female] => 4
        )



    [2018-08-07] => Array
        (
            [male] => 1
            [female] => 5
        )
[2018-08-06] => Array
        (
            [male] => 2
            [female] => 3
        )


)

so my result would be

Array
(
    [2018-08-02] => Array
        (
            [male] => 4
            [female] => 4
        )



    [2018-08-07] => Array
        (
            [male] => 2
            [female] => 5
        )

   [2018-08-09] => Array
        (
            [male] => 1
            [female] => 5
        )
[2018-08-06] => Array
        (
            [male] => 2
            [female] => 3
        )
)

Code is

foreach ($reportlist as $reportlists){ 
    $daterep=$reportlists['act_date']; 
    $arr[$daterep]['male']=$reportlists['male_cnt']; 
    $arr[$daterep]['female']=$reportlists['female_cnt']; 
}

foreach ($ureportlist as $ureportlists){ 
    $daterep=$rueportlists['act_date']; 
    $arr2[$daterep]['male']=$reportlists['male_cnt']; 
    $arr2[$daterep]['female']=$reportlists['female_cnt'];
}

Answer 1

Here is your code,

<?php
function pr($arr = [])
{
    echo "<pre>";
    print_r($arr);
    echo "</pre>";
}
$arr1 = array
    (
    "2018-08-02" => array
    (
        "male"   => 1,
        "female" => 0,
    ),

    "2018-08-07" => array
    (
        "male"   => 1,
        "female" => 0,
    ),

    "2018-08-09" => array
    (
        "male"   => 1,
        "female" => 5,
    ),

);
$arr2 = array
    (
    "2018-08-02" => array
    (
        "male"   => 3,
        "female" => 4,
    ),

    "2018-08-07" => array
    (
        "male"   => 1,
        "female" => 5,
    ),
    "2018-08-06" => array
    (
        "male"   => 2,
        "female" => 3,
    ),
);

function custom_function($arr){
    $retArr = array();
    foreach ($arr as $child) { // arr1, arr2
        foreach ($child as $key => $value) { // traversing through keys
            foreach($value as $k => $v){
                if (isset($retArr[$key][$k])) { // if key is set then add
                    $retArr[$key][$k] += $v;
                } else {
                    $retArr[$key][$k] = $v; // else initiate
                }

            }
        }
    } 
    return $retArr;
}
$result=custom_function(array($arr1,$arr2));
pr($result);die;

Here is your working code