How to use a recursion function in PHP to increment the value on array and return total value from array

Question

Consider:

<?php
class hitung
{
    function hitungBiaya($arr, $totalBiaya)
    {
        $totalBiaya += $arr[0]['biaya'];
        array_splice($arr, 0);
        if ($arr !== null && count($arr) > 0) {
            $this->hitungBiaya($arr, $totalBiaya);
        }
        return $totalBiaya;
    }
}

$hitung = new hitung;

$data = [
    [
        "biaya" => 100,
    ], [
        "biaya" => 1000
    ],
    [
        "biaya" => 5000
    ],
    [
        "biaya" => 3000
    ]
];

$jumlah = $hitung->hitungBiaya($data, 0);
echo $jumlah;
?>

How can I fix this?

I expected to get 8100, but when I run this function, it only gives me 100 as a result.

If you sum all values in that array, it would be 9100, not 8100. Is that what you mean? — M. Eriksson, Dec 18 '20 at 06:44
Does this answer your question? [Summing objects property in array](https://stackoverflow.com/questions/20194259/summing-objects-property-in-array) — Ruli, Dec 18 '20 at 09:53
see [array_reduce](https://www.php.net/manual/en/function.array-reduce.php) - ie, `$sum = array_reduce($data, function($r, $e) { return $r + $e["biaya"]; }, 0);` — Mulan, Dec 18 '20 at 17:23

score 0 · Accepted Answer · edited May 25 '22 at 22:26

0

Code is in the C language as shown below.

Based on an old mathematical formula:

Sum of n numbers = sum of (n-1) numbers + nth term

Please adjust for array index, overshooting or it being less than 0.

int sum(int arr[], int arrlength)
{
    if (arrlength == 0)
        return 0;

    return (sum(arr, arrlength - 1) + arr [arrlength]);
}

edited May 25 '22 at 22:26

Peter Mortensen

30,030
21
100
124

answered Dec 18 '20 at 08:33

Nandan Kaushik

16
1

1

I can not see any attached pic, also do not post code pics, post code and use formatting for that – Ruli Dec 18 '20 at 09:52
thanks for great answer but as newbie on code it seem hard to understand it – silvester landu hunggu wali Dec 18 '20 at 11:15
#Based on old mathematical formula # Sum of n numbers= sum of (n-1) numbers + nth term # code goes somewhat like this, trying in c lang Int sum( int arr[] , int arrlenght) { If ( arrlength == 0 ) return 0 ; return ( sum ( arr, arrlength -1) + arr [ arrlength] ) ; } – Nandan Kaushik Dec 18 '20 at 15:27
ok thanks bro @NandanKaushik – silvester landu hunggu wali Dec 21 '20 at 00:16

How to use a recursion function in PHP to increment the value on array and return total value from array

1 Answers1