<?php
if ($_SERVER['REQUEST_METHOD'] === 'POST' && isset($_POST['q1']) && isset($_POST['q2']) && isset($_POST['q3'])) {
  // Process the quiz results based on user answers
  $quizResults = [];
  // Implement the quiz result calculation here based on user answers

  // Prepare the email message with quiz results
  $to = 'YOUR_EMAIL_ADDRESS';
  $subject = 'Quiz Results for Sciatica Pain Treatment';
  $message = 'Hello ' . $_POST['first_name'] . ',' . "\r\n\r\n";
  // Include the quiz results in the email message
  $message .= 'Your quiz results: ' . implode(', ', $quizResults) . "\r\n\r\n";
  $message .= 'Thank you for taking the quiz. If you have any questions, feel free to contact us.';

  // Send the email
  mail($to, $subject, $message);

  // Redirect back to the main quiz page
  wp_redirect('URL_OF_THE_MAIN_QUIZ_PAGE');
  exit;
}
?>