WooCommerce - Function to restrict users from placing multiple orders per hour

functions.php

<?php
// Function to restrict users from placing multiple orders per hour
function restrict_orders_per_hour_product_notice() {
    // Get the current user's ID.
    $user_id = get_current_user_id();
    
    // Retrieve all orders for the current user.
    $orders = wc_get_orders( array(
        'numberposts' => -1,
        'orderby' => 'date',
        'order' => 'DESC',
        'customer_id' => $user_id,
    ) );

    if ( $orders ) {
        // Get the latest order for the user.
        $latest_order = current( $orders );

        // Calculate the time difference between the current time and the latest order's creation time.
        $time_difference = time() - strtotime( $latest_order->get_date_created()->date_i18n( 'Y-m-d H:i:s' ) );

        // Calculate the remaining time until the user can place another order (maximum one order per hour).
        $remaining_time = 60 - round( $time_difference / 60 ); // Convert seconds to minutes.

        // If the user has placed an order within the last hour, display the notice.
        if ( $time_difference < 3600 ) {
            echo '<div class="woocommerce-info">';
            printf( __( 'You can only place one order per hour. Please try again in %d minute(s).', 'woocommerce' ), $remaining_time );
            echo '</div>';

            // Disable "Add to Cart" buttons on product pages to prevent additional orders.
            add_filter( 'woocommerce_is_purchasable', '__return_false' );
        }
    }
}

// Hook the function to display the restriction notice and disable "Add to Cart" buttons on product pages.
// The priority (5) ensures this code runs early before other elements on the product page.
add_action( 'woocommerce_before_single_product_summary', 'restrict_orders_per_hour_product_notice', 5 );