Re-direct users after email script

I have a PHP mail script (see below) that is working great.  However, at this time, when someone hits SEND on the HTML page, it just directs them to a blank white page, so they keep hitting back & send again.

What would it take in this PHP script to re-direct it to thankyou.html once they have submitted the form?

Thanks!

<?php
 
// Report PHP errors
error_reporting(E_ALL);
 
// Assign the variables
$requester = $_POST['requester'];
$phone = $_POST['phone'];
//$date = date(F j, Y);
$bdesc = $_POST['bdesc'];
$desc = $_POST['desc'];
$loc = $_POST['loc'];
$cdate = $_POST['cdate'];
$dept = $_POST['dept'];
$email = $_POST['email'];
 
// Mail
$static = "rusty.page@bioness.com";
$subject = $bdesc;
$body = "<strong>"."Requester's Name:     " ."</strong>". $requester . "<br>" . "<strong>". "Requester's Phone Number:     " ."</strong>". $phone . "<br>" ."<strong>"."Problem Description:     " ."</strong>". $desc . "<br>" . "<strong>"."Location:     " ."</strong>".$loc . "<br>" ."<strong>"."Date needed by:     "."</strong>" . $cdate . "<br>" ."<strong>". "Requester's Department:     " ."</strong>". $dept;
$headers = 
      "From: " . $email . "\r\n" . 
      "Reply-To: " . $email . "\r\n" . 
      "MIME-Version: 1.0" . "\r\n" . 
      "Content-type: text/html;charset=iso-8859-1" . "\r\n" .
      "X-Mailer: PHP/" . phpversion();
mail($static, $subject, $body, $headers);
 
 
?>

Select allOpen in new window