how to send customer details to database ?

<?php
require_once(__DIR__.'/../../../vendor/autoload.php');


\Stripe\Stripe::setApiKey('sk_test_xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx');
$session = \Stripe\Checkout\Session::create([
    'payment_method_types' => ['card'],
    'line_items' => [[
      'price_data' => [
        'currency' => 'usd',
        'product_data' => [
          'name' => 'T-shirt',
        ],
        'unit_amount' => 2000,
      ],
      'quantity' => 1,
    ]],
    'mode' => 'payment',
    'success_url' => 'https://example.com/success',
    'cancel_url' => 'https://example.com/cancel',
  ]);

?>

and this is my webhook.blade.php:

<?php
//THis webhook is for tutorial
        include('database/mydb.php');
        require_once 'stripe-php-master/init.php';

// Set your secret key. Remember to switch to your live secret key in production!
// See your keys here: https://dashboard.stripe.com/account/apikeys
\Stripe\Stripe::setApiKey('sk_test_xxxxxxxxxxxxxxxxxxxxxxxxxxxx');

// If you are testing your webhook locally with the Stripe CLI you
// can find the endpoint's secret by running `stripe listen`
// Otherwise, find your endpoint's secret in your webhook settings in the Developer Dashboard
$endpoint_secret = 'whsec_xxxxxxxxxxxxxxxxxxxxxxx';

$payload = @file_get_contents('php://input');
$sig_header = $_SERVER['HTTP_STRIPE_SIGNATURE'];
$event = null;

try {
    $event = \Stripe\Webhook::constructEvent(
        $payload, $sig_header, $endpoint_secret
    );
} catch(\UnexpectedValueException $e) {
    // Invalid payload
    http_response_code(400);
    exit();
} catch(\Stripe\Exception\SignatureVerificationException $e) {
    // Invalid signature
    http_response_code(400);
    exit();
}
$id = $event->data->object->id;
$amount = $event->data->object->amount_captured;
$currency = $event->data->object->currency;
$cus_email = $event->data->object->receipt_email;
$name = $event->data->object->billing_details->name;

// Handle the event
switch ($event->type) {
    case 'payment_intent.succeeded':
        $paymentIntent = $event->data->object; // contains a StripePaymentIntent
        handlePaymentIntentSucceeded($paymentIntent);
        break;

    case 'charge.succeeded':
    $stmt = $con->prepare("INSERT INTO payments (txn_id, amount, currency, cus_email, name) VALUES (?, ?, ?, ?, ?)");
    $stmt->bind_param("sdsss", $id, $amount, $currency, $cus_email, $name);
    $stmt->execute();
    if (!$stmt) {
      # code...
      echo 'There was an error'.mysqli_error($con);
    }
    $stmt->close();
    $con->close();
        break;


    if (!$stmt) {
      # code...
      echo 'There was an error'.mysqli_error($con);
    }
    $stmt->close();
    $con->close();
        break;


    // ... handle other event types
    default:
        echo 'Received unknown event type ' . $event->type;
}

http_response_code(200);
?>