"Log Out Other Devices" Button for Members

add_action( 'template_redirect', function () {
    if ( empty( $_POST['wpide_logout_others_nonce'] ) || ! is_user_logged_in() ) {
        return;
    }

    if ( ! wp_verify_nonce( sanitize_key( $_POST['wpide_logout_others_nonce'] ), 'wpide_logout_others' ) ) {
        wp_die( 'The form expired. Please go back and try again.' );
    }

    WP_Session_Tokens::get_instance( get_current_user_id() )->destroy_others( wp_get_session_token() );

    wp_safe_redirect( add_query_arg( 'sessions-ended', 1 ) );
    exit;
} );

add_shortcode( 'wpide_logout_others', function () {
    if ( ! is_user_logged_in() ) {
        return '';
    }

    if ( isset( $_GET['sessions-ended'] ) ) {
        return '<p class="wpide-sessions-notice" role="status">You have been logged out everywhere else.</p>';
    }

    $others = max( 0, count( WP_Session_Tokens::get_instance( get_current_user_id() )->get_all() ) - 1 );

    if ( ! $others ) {
        return '<p class="wpide-sessions-notice">You are not logged in anywhere else.</p>';
    }

    return '<form method="post" class="wpide-logout-others">'
        . wp_nonce_field( 'wpide_logout_others', 'wpide_logout_others_nonce', true, false )
        . '<p>' . esc_html( sprintf( _n( 'You are logged in on %d other device or browser.', 'You are logged in on %d other devices or browsers.', $others ), $others ) ) . '</p>'
        . '<p><button type="submit">Log out everywhere else</button></p></form>';
} );