Redirecting email script to web page - php

Question

I currently have the below email/db script that works fine but the redirect doesn't seem to be working. Instead of redirecting to the url its just showing the blank php page. How can I fix this?
<?php
$con = mysql_connect("localhost","user","pass");
if (!$con)
{
die('Could not connect: ' . mysql_error());
}
mysql_select_db("register", $con);
$sql="INSERT INTO register_interest (Name, Email, Message, Website)
VALUES ('$_POST[Name]', '$_POST[Email]', '$_POST[Message]', '$_POST[Website]')";
if (!mysql_query($sql,$con))
{
die('Error: ' . mysql_error());
}
mysql_close($con);
$to = "email";
$subject = "Interest";
$email = $_POST['Email'] ;
$message = $_POST['Message'] ;
$headers = "From: $email";
$sent = mail($to, $subject, $message, $headers) ;
if ($sent) {
header("Location: http://www.url.co.uk");
exit();
} else {
print "We encountered an error sending your email";
}
?>

Answer 1

<?php
$con = mysqli_connect("localhost","user","pass","register");
if (mysqli_connect_errno())
{
die('Could not connect: ' . mysqli_connect_error());
}
$name = mysqli_real_escape_string($con, $_POST['Name']);
$email = mysqli_real_escape_string($con, $_POST['Email']);
$message = mysqli_real_escape_string($con, $_POST['Message']);
$website = mysqli_real_escape_string($con, $_POST['Website']);
$sql = "INSERT INTO register_interest (Name, Email, Message, Website)
VALUES ('$name', '$email', '$message', '$website')";
if (!mysqli_query($con, $sql))
{
die('Error: ' . mysqli_error($con));
}
mysqli_close($con);
$to = "email#address.com";
$subject = "Interest";
$email = $_POST['Email'] ;
$message = $_POST['Message'] ;
$headers = "From: $email\n";
$sent = mail($to, $subject, $message, $headers) ;
if ($sent) {
header("Location: http://www.url.co.uk");
exit();
} else {
print "We encountered an error sending your email";
}
?>

Answer 2

Try this code :
if(!$sent){
print "We encountered an error sending your email";
exit;
}
header("Location: http://www.url.co.uk");

Answer 3

Check if you have any blank lines before the opening PHP tags), then the header directive will not work.