Extends the user login period to one year for all users, regardless of the "Remember Me" option.

my-persistent-login-for-all-users.php

<?php
/**
 * Plugin Name: Persistent Login for All Users
 * Description: Extends the user login period to one year for all users, regardless of the "Remember Me" option.
 * Version: 1.0
 * Author: Your Name
 *
 * @link https://developer.wordpress.org/reference/hooks/auth_cookie_expiration/
 *
 * Usage: This plugin extends the login period for all users to one year without requiring them to select the "Remember Me" option.
 * It can be added by creating a custom plugin or using the Code Snippets plugin.
 */
 
function my_user_persistent_login( $expiration, $user_id, $remember ) {
    return YEAR_IN_SECONDS; // Adjust as needed, e.g., YEAR_IN_SECONDS * 2 for two years.
}
add_filter( 'auth_cookie_expiration', 'my_user_persistent_login', 10, 3 );