I am trying to change the title which is shown in Tabs/Windows when visiting a page you have no access to, where it now says "WordPress > Error".

This is how far I have come, but it doesn't work at all:

add_filter( 'wp_die_handler', 'change_die_wpse_120304' );
function change_die_wpse_120304()
    return 'do_wp_die_wpse_120304';

function do_wp_die_wpse_120304( $message, $title, $args )
    return 'Mynewtitle'.' • '.$title.' ‹ '.get_bloginfo('name'); 

I think wp_die_handler has something to do with this, but I cannot find any solution for this.

  • 1
    Can you elaborate a bit? When you say "when visiting a page you have no access to" do you mean a non-existent web page that ought to 404? Or do you mean a part of the admin that you don't have permissions for? Apr 5, 2018 at 15:48
  • A part of the admin you dont have permissions for. Sorry for not making it clear!
    – jockebq
    Apr 5, 2018 at 16:14

1 Answer 1


The wp_die_handler filter filters the handler for the function responsible to kill the execution of the script. So it needs to return the callable that WordPress will use when wp_die() is called.

The actual callable that is returned from the wp_die_handler filter must output the error message and die.

function wpse_die( $message, $title = '', $args = [] ) {
  echo 'yolo';

function wpse_die_handler(){
  return 'wpse_die';
add_filter( 'wp_die_handler', 'wpse_die_handler' );

Have a look at _default_wp_die_handler() for a look at what WordPress outputs from the default handler for wp_die().

  • I tried inserting return 'Mynewtitle'.' • '.$title.' ‹ '.get_bloginfo('name'); where you put echo 'yolo'; but it doesn't work. I am not sure I understand what I am missing here.
    – jockebq
    Apr 5, 2018 at 16:37
  • You want to echo and die, not return. Apr 5, 2018 at 16:46
  • So this is my new code: echo 'Mynewtitle'.' • '.$title.' ‹ '.get_bloginfo('name'); die; Still not working!
    – jockebq
    Apr 5, 2018 at 17:11
  • I have been trying everything for the last 2 hours without coming anywhere. How do I edit the title?
    – jockebq
    Apr 9, 2018 at 9:33

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