WordPress redirect after successful form validation and submit - wordpress

Question

I have a custom page template with a form in page-report.php.
I do validation on it, so I need the action to lead to the same form, but I need to redirect to a different page on successful validation.
wp_redirect() is not working, because is spitting out the header() function after the output was started already.
if($_POST['report'])
{
if($validator->ValidateForm())
{
wp_redirect('http://thankyou') // redirect
}
}
I cannot use ob_start() and ob_flush() because the header is not included in this page template.
I tried to put a function in functions.php :
add_action('get_header','redirect_to');
function redirect_to($page){
if($page)
{
wp_redirect('http://www.google.com');
}
}
But that works only if I don't have the conditional if().
If I use it, the wp_redirect() is being spat out after the output was started.
What is my best approach to do this?
Thanks.

Answer 1

I think you have to use the save_post hook:
do_action('save_post', 'custom_add_save');
function custom_add_save($postID){
// called after a post or page is saved
if($_POST['report']) {
if($validator->ValidateForm())
{
wp_redirect('http://thankyou') // redirect
}
}
Also you could just try using a plugin instead of your own code...Gravity Forms and Contact form 7 both work well.
}

Answer 2

I got it...
Since I was doing everything from inside an admin page, the header was fired up before the wp_redirect() as it was explained in the question.
So I ended up making a new function at the top:
add_action('admin_init','redirect_to');
function redirect_to()
{
if ( isset($_REQUEST['action']) && 'adduser' == $_REQUEST['action'] ) {
wp_redirect($redirect);
die();
}
}
}
That is making sure that the redirect_to() function will be fired up before the header (on admin_init). Maybe not the most elegant solution, but it works perfect.

Answer 3

So in the case anybody is looking for "Redirect after post" in wordpress, this is how you do it:
wp_redirect($_SERVER['REQUEST_URI']);

Answer 4

Try this
if( $_POST['report'] ) {
if( $validator->ValidateForm() ) {
header( 'Location: http://thankyou' ) ;
}
}