redirecting to thankyou page code check - php

Question

The code below is form for mail..but em not able to redirect..can anyone check whats wrong in the code.. The thankyou.html is in the same folder.
Thanks in advance
`http://blog.teamtreehouse.com/create-ajax-contact-form
// Added input sanitizing to prevent injection
// Only process POST reqeusts.
if ($_SERVER["REQUEST_METHOD"] == "POST") {
// Get the form fields and remove whitespace.
$name = strip_tags(trim($_POST["name"]));
$name = str_replace(array("\r","\n"),array(" "," "),$name);
$email = filter_var(trim($_POST["email"]), FILTER_SANITIZE_EMAIL);
$message = trim($_POST["message"]);
$phone = trim($_POST["phone"]);
// Check that data was sent to the mailer.
if ( empty($name) OR empty($phone) OR empty($message) OR !filter_var($email, FILTER_VALIDATE_EMAIL)) {
// Set a 400 (bad request) response code and exit.
http_response_code(400);
echo "Oops! There was a problem with your submission. Please complete the form and try again.";
exit;
}
// Set the recipient email address.
// FIXME: Update this to your desired email address.
$recipient = "ranjith#appleete.com";
// Set the email subject.
$subject = "New contact from $name";
// Build the email content.
$email_content = "Name: $name\n";
$email_content .= "Email: $email\n\n";
$email_content .= "Phone:\n$phone\n";
$email_content .= "Message:\n$message\n";
// Build the email headers.
$email_headers = "From: $name <$email>";
// Send the email.
if (mail($recipient, $subject, $email_content, $email_headers)) {
// Set a 200 (okay) response code.
header('Location:thankyou.html');
}
else {
// Set a 500 (internal server error) response code.
http_response_code(500);
echo "Oops! Something went wrong and we couldn't send your message.";
}
} else {
// Not a POST request, set a 403 (forbidden) response code.
http_response_code(403);
echo "There was a problem with your submission, please try again.";
}
?>'

Answer 1

Make sure that the mail part works, so it's reaching the redirect part.
if (mail($recipient, $subject, $email_content, $email_headers)) {
// Set a 200 (okay) response code.
echo "It tries to redirect"; exit; //Do you see this!?
header('Location:thankyou.html');
exit; //Add an exit to make sure your code stops here.
}
Also make sure there isn't anything like echo, print_r, var_dump, or anything else that display things before the header part. It won't work when you already have output.
If this is called through an AJAX request you need to be aware that that the thankyou page echo the correct HTML and your AJAX callback function displays this HTML correctly.