.php <?php  if ($_SERVER["REQUEST_METHOD"] == "POST") { // checks whether a POST request actually exists or not.      $user_subject = strip_tags(trim($_POST['subject']));     $user_message = strip_tags(trim($_POST['message']));      $send_to = 'myemail@gmail.com';      mail($send_to, $user_subject, $subject_message);  } 