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( "Location: /404.php", true, 404 );
  exit();
endif;

```

But this actually does not redirect, but just shows an empty page (because of the exit() call before any output to the browser).

I've also tried the following:

```
if ( !$found ):
  header( "HTTP/1.1 404 Not Found" );
  exit();
endif;

```

With a 'ErrorDocument 404 /404.php' in my .htaccess file, but this also just shows an empty page.

And if I do this:

```
if ( !$found ):
  header( "HTTP/1.1 404 Not Found" );
  header( "Location: /404.php" );
  exit();
endif;

```

It does redirect, but with a 302 header.

Any help would be greatly appreciated.