Capture stripe payment - laravel

Question

I am using the stripe/stripe package to capture payment for single product. Everything is working as expected however when the user is returned to the order-confirmation page, I would like to get the stripe payment id. How would i achieve this?
Im not sure if i need a webhook and if i would, how would i use this?
public function onCharge() {
$user = Auth::getUser();
$course = CourseMeta::where('id', $this->param('id'))->first();
$stripe = new \Stripe\StripeClient(env('STRIPE_SECRET'));
$product = $stripe->products->create([
'name' => $course->course->name . ' - ' . $course->date,
]);
$price = $stripe->prices->create([
'unit_amount' => $course->price * 120,
'currency' => 'gbp',
'product' => $product->id,
]);
$validator = Validator::make(
[
'user_id' => $user->id,
'coursemeta_id' => $course->id,
'course_id' => $course->course->id,
'stripe_id' => '1',
],
[
'user_id' => 'required',
'coursemeta_id' => 'required',
'course_id' => 'required',
'stripe_id' => 'required'
]
);
if ($validator->fails()) {
return Redirect::back()->withErrors($validator);
} else {
$order = new Order();
$order->user_id = $user->id;
$order->coursemeta_id = $course->id;
$order->stripe_id = '1';
$order->company = request()->get('company');
$order->company_firstname = request()->get('company_firstname');
$order->company_lastname = request()->get('company_lastname');
$order->company_email = request()->get('company_email');
$order->company_phone = request()->get('company_phone');
$order->citb_levy = request()->get('citb_levy');
$order->d_firstname = request()->get('d_firstname');
$order->d_lastname = request()->get('d_lastname');
$order->d_email = request()->get('d_email');
$order->d_phone = request()->get('d_phone');
$order->d_dob = request()->get('d_dob');
$order->d_ninumber = request()->get('d_ninumber');
$order->save();
}
$portal = $stripe->checkout->sessions->create([
'success_url' => env('APP_URL') . '/order-confirmation'.'?' . 'user=' . $user->id . '&' . 'course=' . $course->id,
'cancel_url' => env('APP_URL') . '/cancel',
'line_items' => [
[
'price' => $price->id,
'quantity' => 1
],
],
'mode' => 'payment',
]);
return redirect($portal->url);
}

Answer 1

You need to use the checkout session ID.
when you create success_url and cancel_url you can also pass {CHECKOUT_SESSION_ID} param with curly braces. when payment gateway will redirect to one of those URLs it will automatically replace {CHECKOUT_SESSION_ID} with the actual session ID.
In your case
$portal = $stripe->checkout->sessions->create([
// HERE ---------------------------------------------------\/----------\/
'success_url' => env('APP_URL') . '/order-confirmation'.'?session_id={CHECKOUT_SESSION_ID}&' . 'user='. $user->id . '&' . 'course=' . $course->id,
'cancel_url' => env('APP_URL') . '/cancel',
'line_items' => [
[
'price' => $price->id,
'quantity' => 1
],
],
'mode' => 'payment',
]);
Now when this page is called you can have session ID and you can retrieve all stuff from it.
// on success or cancel page you can use this code to get infos
$stripe = new \Stripe\StripeClient(env('STRIPE_SECRET'));
$session = \Stripe\Checkout\Session::retrieve(get('session_id'));
$customer = \Stripe\Customer::retrieve($session->customer);
$paymentIntent = \Stripe\PaymentIntent::retrieve($session->payment_intent);
// from this $session you can get customer/items/paymentIntent etc..
ref : https://stripe.com/docs/payments/checkout/custom-success-page
if any doubt please comment.