I am currently working on a project where we are using PayMongo as our payment gateway. I am facing an issue with retrieving the failed payment response using the PayMongo webhook.

Whenever I select the ‘Fail Test Payment’ option on the payment or checkout page, the webhook does not detect it, and the payment process does not stop; instead, it redirects back to the payment page to select a payment method.

ini_set('display_errors', 1);
error_reporting(E_ALL);


function logWithTimestamp($message) {
    $timestamp = date('Y-m-d H:i:s');
    if (is_array($message) || is_object($message)) {
        $message = print_r($message, true); // Convert array/object to string
    }
    file_put_contents("webhook_log.txt", "[$timestamp] $message" . PHP_EOL, FILE_APPEND);
}



$payload = file_get_contents("php://input");

if (!$payload) {
    logWithTimestamp("No payload received.");
    http_response_code(400);
    echo json_encode(["message" => "No payload received"]);
    exit;
}

$data = json_decode($payload, true);


if (json_last_error() !== JSON_ERROR_NONE) {
    logWithTimestamp("JSON Decode Error: " . json_last_error_msg());
    http_response_code(200);
    echo json_encode(["message" => "Invalid JSON format"]);
    exit;
}

function searchArray($array, $keys) {
    $result = [];
    
    $recursiveSearch = function ($array, $key, &$found) use (&$recursiveSearch) {
        if (is_array($array)) {
            foreach ($array as $k => $v) {
                if ($k === $key) {
                    $found[] = $v;
                } elseif (is_array($v)) {
                    $recursiveSearch($v, $key, $found);
                }
            }
        }
    };

    foreach ($keys as $key) {
        $found = [];
        $recursiveSearch($array, $key, $found);
        $result[$key] = count($found) === 1 ? $found[0] : $found;
    }

    return $result;
}

$jsonResponse = $data;

$keysToFind = ['id', 'status', 'source'];

$values = searchArray($jsonResponse, $keysToFind);

$paymentId = $values['id'] ?? null;  // PayMongo payment ID is usually the second 'id' found
$paymentSource = $values['source'] ?? null;
$status = $values['status'] ?? null;

$test = [$paymentId, $paymentSource, $status];

logWithTimestamp($test);


http_response_code(200);
exit

I hope to gain insights into why the webhook is not receiving the failed payment response