Kim Clark Community Forum Response

wp_die_handler.php

<?php
  
add_filter( 'wp_die_handler', 'my_custom_wp_die_handler' );

function my_custom_wp_die_handler( $handler ) {
    return 'my_override_wp_die';
}

function my_override_wp_die( $message, $title = '', $args = array() ) {
    if ( trim( $message ) === 'Oops! This file is protected.' ) {
        $message = 'This file is protected. <a href="' . esc_url( wp_login_url() ) . '">Please log in</a> to access it.';
        $title = 'Protected File';
    }

    // Fallback to normal error for other cases
    if ( ! isset( $args['back_link'] ) ) {
        $args['back_link'] = true;
    }
    
    return _default_wp_die_handler( $message, $title, $args );
}