using =+ on variable then get undefined variable while the variable answer is correct in PHP

Question

I made a loop then sum it into variable $jumlahtotal, what I confuse is the value in $jumlahtotal is true when I try to echo it, but I getting undefined variable error on this $jumlahtotal

Note : i tried declare it outside the foreach but still getting error undefined variable;

here's my code :

$total = 0;
    $totalberat = 0;
    if (isset($_SESSION['items'])) {
    foreach ($_SESSION['items'] as $key => $val) {
    $query = mysqli_query($koneksi, "select * from barang where br_id = '$key'");
        $data = mysqli_fetch_array($query);
        $jumlah_harga = $data['br_hrg']*$val;
        $total += $jumlah_harga;
        $berat = $data['brt_brg']*$val;
        $totalberat += $berat;
        $jumlahtotal += $val;
}}
?>

@MarkVincentManjac it work, I just know it must declared as 0 first before sum it, thx — Gusti Aldi
– Gusti Aldi, Commented Dec 16, 2016 at 8:21

Jmunoz Dev · Accepted Answer · 2016-12-16 08:32:53Z

1

Some tips:

Start declaring $jumlahtotal=0 above $totalberat.

$total = 0;
$totalberat = 0;
$jumlahtotal = 0;

Validate the value of $val before adding its value to $jumlahtotal.

if (is_int($val)) {
    $jumlahtotal += $val;
} else {
    die('$val not int');
}

If its all okay, debug the code and check the code is reaching the '$jumlahtotal += $val;' sentence and debug it.

$jumlahtotal += $val;
var_dump($jumlahtotal);

It should help you to find the issue.

answered Dec 16, 2016 at 8:32

Jmunoz Dev

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