Thread: How to redirect after contact form submit?

How to redirect after contact form submit?

I am trying to redirect visitors to a different web page after they post a comment on
the sidebar comment form in the Classipress theme. I have tried to add the following line of code after the first if statement in the Sidebar-Contact.php file:

if (isset($_POST['submit']) && $_POST['send_email'] == 'yes') {
header('Location: http://domain.com');

However I recieve the following error at the top of the sidebar contact form"

"Warning: Cannot modify header information - headers already sent by (output started...".

Does anyone know if and how this can be done? I would greatly appreciate any help.