Check and redirect to login before checkout - Force login and registration sign up sign in - Woocommerce

check-and-redirect-to-login-before-checkout-force-login-and-registration-sign-up-sign-in-woocommerce.php

<?php

/*
 * WooCommerce check and redirect to login before checkout
 */

add_action('template_redirect', 'check_if_logged_in');
function check_if_logged_in()
{
    $pageid = get_option('woocommerce_checkout_page_id');
    
    // Check if the user is not logged in and on the checkout page
    if (!is_user_logged_in() && is_page($pageid)) {
        $url = add_query_arg('redirect_to', get_permalink($pageid), site_url('/mio-account/')); // your my account URL
        wp_redirect($url);
        exit;
    }
    
    // Check if the user is logged in and on the my account page
    if (is_user_logged_in() && is_page(get_option('woocommerce_myaccount_page_id'))) {
        $redirect = isset($_GET['redirect_to']) ? esc_url($_GET['redirect_to']) : '';
        
        if (!empty($redirect)) {
            echo '<script>window.location.href = "' . $redirect . '";</script>';
            exit;
        }
    }
}