自动回复电子邮件发送/提交

我刚刚继承了一个PHP表单，我需要的是表单的提交者收到他们刚刚在字段中输入的内容的收据。这就是我所拥有的，不知道从哪里开始。其他一切都很好，当他们提交时我收到了电子邮件，我只需要他们收到一份副本。

 <?php
 // OPTIONS - PLEASE CONFIGURE THESE BEFORE USE!
 $yourEmail = "email@email.com"; // the email address you wish to receive these mails through
 $yourWebsite = "Application"; // the name of your website
 $thanksPage = ''; // URL to 'thanks for sending mail' page; leave empty to keep message on the    same page 
 $maxPoints = 4; // max points a person can hit before it refuses to submit - recommend 4
$requiredFields = "name,lastname,email,Phone,ReferredBy";     // names of the fields you'd like to be required as a minimum, separate each field with a comma
 $textlink ='<a href="confirmation.html">Click Here And Take The Next Step</a>.' ; 
// DO NOT EDIT BELOW HERE
 $error_msg = array();
 $result = null;
 $requiredFields = explode(",", $requiredFields);
 function clean($data) {
$data = trim(stripslashes(strip_tags($data)));
return $data;
 }
 function isBot() {
$bots = array("Indy", "Blaiz", "Java", "libwww-perl", "Python", "OutfoxBot", "User-Agent", "PycURL", "AlphaServer", "T8Abot", "Syntryx", "WinHttp", "WebBandit", "nicebot", "Teoma", "alexa", "froogle", "inktomi", "looksmart", "URL_Spider_SQL", "Firefly", "NationalDirectory", "Ask Jeeves", "TECNOSEEK", "InfoSeek", "WebFindBot", "girafabot", "crawler", "www.galaxy.com", "Googlebot", "Scooter", "Slurp", "appie", "FAST", "WebBug", "Spade", "ZyBorg", "rabaz");
foreach ($bots as $bot)
    if (stripos($_SERVER['HTTP_USER_AGENT'], $bot) !== false)
        return true;
if (empty($_SERVER['HTTP_USER_AGENT']) || $_SERVER['HTTP_USER_AGENT'] == " ")
    return true;
return false;
 }
  if ($_SERVER['REQUEST_METHOD'] == "POST") {
if (isBot() !== false)
    $error_msg[] = "No bots please! UA reported as: ".$_SERVER['HTTP_USER_AGENT'];
// lets check a few things - not enough to trigger an error on their own, but worth assigning a spam score.. 
// score quickly adds up therefore allowing genuine users with 'accidental' score through but cutting out real spam :)
$points = (int)0;
$badwords = array("javascript");
foreach ($badwords as $word)
    if (
        strpos(strtolower($_POST['comments']), $word) !== false || 
        strpos(strtolower($_POST['name']), $word) !== false
    )
        $points += 2;
if (strpos($_POST['comments'], "http://") !== false || strpos($_POST['comments'], "www.") !== false)
    $points += 2;
if (isset($_POST['nojs']))
    $points += 1;
if (preg_match("/(<.*>)/i", $_POST['comments']))
    $points += 2;
if (strlen($_POST['name']) < 3)
    $points += 1;
if (strlen($_POST['comments']) < 15 || strlen($_POST['comments'] > 1500))
    $points += 2;
if (preg_match("/[bcdfghjklmnpqrstvwxyz]{7,}/i", $_POST['comments']))
    $points += 1;
// end score assignments
foreach($requiredFields as $field) {
    trim($_POST[$field]);
    if (!isset($_POST[$field]) || empty($_POST[$field]) && array_pop($error_msg) != "Please fill in all the required fields and submit again.'r'n")
        $error_msg[] = "Please fill in all the required fields and submit again.";
}
if (!empty($_POST['name']) && !preg_match("/^[a-zA-Z-''s]*$/", stripslashes($_POST['name'])))
    $error_msg[] = "The name field must not contain special characters.'r'n";
if (!empty($_POST['email']) && !preg_match('/^([a-z0-9])(([-a-z0-9._])*([a-z0-9]))*'@([a-z0-9])(([a-z0-9-])*([a-z0-9]))+' . '('.([a-z0-9])([-a-z0-9_-])?([a-z0-9])+)+$/i', strtolower($_POST['email'])))
    $error_msg[] = "That is not a valid e-mail address.'r'n";

if ($error_msg == NULL && $points <= $maxPoints) {
    $subject = "New Payment";
    $message = "Here is a new applicant: 'n'n";
    foreach ($_POST as $key => $val) {
        if (is_array($val)) {
            foreach ($val as $subval) {
                $message .= ucwords($key) . ": " . clean($subval) . "'r'n";
            }
        } else {
            $message .= ucwords($key) . ": " . clean($val) . "'r'n";
        }
    }
    $message .= "'r'n";
    // this means reply to the sender with e-mail and subject.
    if (strstr($_SERVER['SERVER_SOFTWARE'], "Win")) {
        $headers   = "From: $yourEmail'r'n";
        $headers  .= "Reply-To: {$_POST['email']}'r'n";
    } else {
        $headers   = "From: $yourWebsite <$yourEmail>'r'n";
        $headers  .= "Reply-To: {$_POST['email']}'r'n";
    }
    if (mail($yourEmail,$subject,$message,$headers)) {
        if (!empty($thanksPage)) {
            header("Location: $thanksPage");
            exit;
        } else {
            $result = 'Congratulations! We have received your application. IMPORTANT Click link below';
            $disable = true;
        }
    } else {
        $error_msg[] = 'Your mail could not be sent this time. ['.$points.']';
    }
} else {
    if (empty($error_msg))
        $error_msg[] = 'Your mail looks too much like spam, and could not be sent this time. ['.$points.']';
}
 }
 function get_data($var) {
if (isset($_POST[$var]))
    echo htmlspecialchars($_POST[$var]);
 }
  ?>

感谢您的支持，现在又有问题了。

发件人必须接收收据中的这些字段，而不是所有字段，因为我必须接收它们。$requiredFields = "name,lastname,email,Phone"在if和else中有这种方法吗?

也就是说，我接收到所有的字段而发送者接收到4/5。