RevenueCat Webhook endpoint php integration

Hi team, 
Is there an example of a Revenuecat webhook endpoint that we can use in our backend php to fetch events data? we d'ont find a kind of information on documentation.
We need a sample like this one (used on stripe) bellow : 
<?php
// webhook.php  
\Stripe\Stripe::setApiKey('Your_Key');  
$endpoint_secret = 'whsec_...'; 
$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
  echo '⚠️  Webhook error while parsing basic request.';
  http_response_code(400);
  exit();
} catch(\Stripe\Exception\SignatureVerificationException $e) {
  // Invalid signature
  echo '⚠️  Webhook error while validating signature.';
  http_response_code(400);
  exit();
} 
// Handle the event
switch ($event->type) {
  case 'customer.subscription.created':
           // What to do
    break;
  case 'customer.subscription.deleted':
           // What to do
    break;
  case 'customer.subscription.updated':
           // What to do
    break; 
    case 'invoice.payment_failed':
        // What to do
    break;
  // ... handle other event types
  default:
    echo 'Received unknown event type ' . $event->type;
}  
http_response_code(200); 
?>
Thanks in advance.