wp_redirect() – headers already sent
Found the answer (via) Instead of using the function I added an action to “wp_loaded”, that makes sure that it gets loaded before any headers are sended. <?php add_action (‘wp_loaded’, ‘my_custom_redirect’); function my_custom_redirect() { if ( isset( $_POST[‘subscribe’] ) ) { $redirect=”http://example.com/redirect-example-url.html”; wp_redirect($redirect); exit; } } ?>