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

You can't have an header 404 with a Location:

You should display the error page and set a meta refresh with the new url if you want to redirect