mysql - How To create a url link and send it to email using php mailer

I created a form where a user types in a code,if the code and email exists in database the code then retrieves the email and a token is generated and updated to the database and has to be sent to that email that is retrieved. I am using php mailer to send an email, can someone help me figure what is wrong with the code below, is the url query correct?

<?php

error_reporting(1);
session_start();


include 'includes/connect.php';
include 'includes/additional_function.php';
include('classes/phpmailer/phpmailer.php');



if($_POST["Submit"]=="Submit"){

 $idcode=$_POST['idcode'];
 $_SESSION['idcode'] = $post['idcode'];

 $sql = "SELECT * FROM people WHERE idcode = :idcode";

 $stmt = $pdo->prepare($sql);

 $stmt->bindValue(':idcode', $idcode);



 $stmt->execute();

 $result = $stmt->fetch(PDO::FETCH_ASSOC);



 if(!empty($result)){
 $email = $result['email'];
 //echo $email;


 $token = generateToken();
 //echo $token;


 $sql = "UPDATE student SET token = :token WHERE email = :email";
 $stmt = $pdo->prepare($sql);

 $stmt->execute(array(
 ':token' => $token,
 ':email' => $email
 ));


 $result1 = $stmt->fetch(PDO::FETCH_ASSOC);
 if(!empty($result)){

 {
// $email and $message are the data that is being
// posted to this page from our html contact form
$email = $_REQUEST['email'] ;




$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

// When sending email using PHPMailer, you need to send from a valid email address
// In this case, we setup a test email account with the following credentials:
// email: [email protected]
// pass: password
$mail->Username = "[email protected]"; // SMTP username
$mail->Password = "password"; // SMTP password

// $email is the user's email address the specified
// on our contact us page. We set this variable at
// the top of this page with:
// $email = $_REQUEST['email'] ;
$mail->From = $email;

// below we want to set the email address we will be sending our email to.
$mail->AddAddress("[email protected]", "Brad Markle");

// set word wrap to 50 characters
$mail->WordWrap = 50;
// set email format to HTML
$mail->IsHTML(true);



$mail->Subject = "You Registration Link!";


$mail->Body = 'http://www.domain.com/register/registration.php?token=$token&stud_id=stud_id';
$mail->AltBody = 'Click to Register';


if(!$mail->Send())
{
 echo "Message could not be sent. <p>";
 echo "Mailer Error: " . $mail->ErrorInfo;
 exit;
}

echo "Message has been sent";
}

} 
}

else{


 echo 'You are not Registered';

}

}

?>
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