How to redirect a Wordpress logout to custom URL?

Question

I want to send a user, logging out of WordPress, to a custom URL.
I used this below code into functions.php in my wordpress theme:

add_filter( 'logout_url', 'my_logout_url' );
    function my_logout_url( $url ) {
       return 'http://yourdomain.com/?a=logout';
    }

But it does not work.
How can I do this?
Many thanks in advance for your help or advice.

Answer 1

I know only 2 hooks when logout happen. This is logout_url and wp_logout. Usually, I use the wp_logout in the next way

function your_prefix_redirect() {
    wp_redirect('https://google.com/');
    die;
}
add_action('wp_logout', 'your_prefix_redirect', PHP_INT_MAX);

Use this code it will works.
Notice: I specified priority as maximum INT, because some other code may do anything else major while logout happen.