PHP form backend

<?php
$payload = json_encode([
  "name" => $_POST["name"] ?? "",
  "email" => $_POST["email"] ?? "",
  "message" => $_POST["message"] ?? "",
]);

$ch = curl_init("https://formivo.faizyab.me/api/f/YOUR_FORM_ID");
curl_setopt_array($ch, [
  CURLOPT_POST => true,
  CURLOPT_POSTFIELDS => $payload,
  CURLOPT_HTTPHEADER => ["Content-Type: application/json", "Accept: application/json"],
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_TIMEOUT => 10,
]);

$response = curl_exec($ch);
$status = curl_getinfo($ch, CURLINFO_HTTP_CODE);
curl_close($ch);

if ($status !== 201) {
  http_response_code(502);
  echo "Could not send your message.";
  exit;
}

header("Location: /thank-you", true, 303);
exit;