PHP header( “Location: /404.php”, true, 404 ) does not work

Question

I\'d like to use the following to redirect pages that are no longer present in the database to the custom 404 page:

ob_start();
....
if ( !$found ):
  header         


        

Answer 1

Maybe without redirect?

if ( !$found ):
   include('../404.php');
   exit();
endif;