added redirection without need of a page, use it for paypal success or failure message already

plugins/cipf_plugin/php/author_restriction.php

@@ -41,6 +41,8 @@ function restrict_author_page_CIPF() {
 	$current_user_id = get_current_user_id();
 
 	if ($current_user_id != $author_id) {
+		// Set up nocache headers before redirecting : https://developer.wordpress.org/reference/functions/wp_safe_redirect/#user-contributed-notes
+		nocache_headers();
 		wp_redirect(home_url(), 301);
 		exit;
 	}