How to Code phpMailer to prevent sending email if hidden field is filled in contact form

How to Code phpMailer to prevent sending email if hidden field is filled
in contact form

I like phpMailer but when I used a previous mailer it had an anti spam code.



You added a hidden field in the contact form and the mail.php script was
coded that if the hidden field was filled in (i.e. only a spam robot would
do that) the mail wouldnt send



How would I add that to this script?
This is my mail.php code as follows



<?php
// $email and $message are the data that is being
// posted to this page from our html contact form
$email = $_REQUEST['email'] ;
$message = $_REQUEST['message'] ;
$name = $_REQUEST['name'] ;
$phone = $_REQUEST['phone'] ;
$address = $_REQUEST['address'] ;
$postcode = $_REQUEST['postcode'] ;
$service = $_REQUEST['service'] ;
$height = $_REQUEST['height'] ;
$how = $_REQUEST['how'] ;
$website = $_REQUEST['website'] ;
$mail_intro ="The following enquiry came from your web site:";
// When we unzipped PHPMailer, it unzipped to
// public_html/PHPMailer_5.2.0
require("class.phpmailer.php");
$mail = new PHPMailer();
// set mailer to use SMTP
$mail->IsSMTP();
// As this email.php script lives on the same server as our email server
// we are setting the HOST to localhost
$mail->Host = "localhost"; // specify main and backup server
$mail->SMTPAuth = true; // turn on SMTP authentication
$mail->Username = "franchise@website.co.uk"; // SMTP username
$mail->Password = "passowrd"; // SMTP password
$mail->From = "noreply@website.co.uk";
$mail->FromName = "B";
$mail->AddReplyTo($email,$name);
$mail->AddAddress("franchise@website.co.uk", "B");
$mail->AddBCC("joseph@website.co.uk", "Joseph");
$response="$mail_intro\n<br />Name: $name\n<br />Email: $email\n<br
/>Phone: $phone\n<br />Address: $address\n<br /> Comments:\n$message\n<br
/> Website: $website\n";
// set word wrap to 50 characters
$mail->WordWrap = 50;
// set email format to HTML
$mail->IsHTML(true);
$mail->Subject = "Enquiry";
// $message is the user's message they typed in
// on our contact us page. We set this variable at
// the top of this page with:
// $message = $_REQUEST['message'] ;
$mail->Body = $response;
$mail->AltBody = $message;
//Autoresponder
$mailto="$email";
$subject="Franchisee Enquiry";
$body.="Thanks for your enquiry, the message below has been sent. \n";
$body.="If due to an unknown technical error you do not receive a response
within 4 hours please phone \n";
$body.="or email us directly at info@website.co.uk where we will be only
too happy to help.\n";
$body.="$mail_intro\n";
$body.="Name: $name\n";
$body.="Email: $email\n";
$body.="Phone: $phone\n";
$body.="Postcode: $postcode\n";
$body.="Service Required: $service\n";
$body.="How found: $how\n";
$body.="Comments:\n$message\n";
mail($mailto,$subject,$body,"From: noreply@website.co.uk\n");
if(!$mail->Send())
{
header("Location: http://website.co.uk/error.php");
echo "Mailer Error: " . $mail->ErrorInfo;
exit;
}
header("Location: http://website.co.uk/thankyou.php");
?>