Php 在WooCommerce上设置简单和可变产品的最小订单量

我已经重新判断了您的代码，因为有一些错误.

对于全球最小订单总数量(基于lowest minimum order)，需要在购物车上进行验证，而不是在添加到购物车上的单个产品上进行验证.因此，如果没有满足要求的(最低)最低订单，购物车中将显示一条错误消息，阻止 checkout 访问.

try 以下操作:

// Display a minimum order input field to product options pricing
add_action('woocommerce_product_options_pricing', 'add_minimum_order_field');
function add_minimum_order_field() {

    woocommerce_wp_text_input( array(
        'id'            => 'minimum_order',
        'type'          => 'number',
        'class'         => 'short',
        'label'         => 'Minimum order',
        'desc_tip'      => true,
        'description'   => 'Set minimum order for this product',
    ) );
}

// Display a minimum order input field to product variation options pricing
add_action('woocommerce_variation_options_pricing', 'add_minimum_order_field_to_variations', 10, 3);
function add_minimum_order_field_to_variations($loop, $variation_data, $variation) {

    woocommerce_wp_text_input( array(
        'id'            => 'minimum_order['.$loop.']',
        'type'          => 'number',
        'wrapper_class' => 'form-row form-row-wide',
        'class'         => 'short',
        'label'         => 'Minimum Order',
        'desc_tip'      => true,
        'description'   => 'Set minimum order for this variation',
        'value'         => get_post_meta($variation->ID, 'minimum_qty', true), 
    ) );
}
// Save minimum order field value for products
add_action('woocommerce_admin_process_product_object', 'save_minimum_order_field');
function save_minimum_order_field($product) {
    $minimum_order = isset($_POST['minimum_order']) ? esc_attr($_POST['minimum_order']) : '';
    $product->update_meta_data('minimum_order', $minimum_order);
}

// Save minimum order field value for product variations
add_action('woocommerce_admin_process_variation_object', 'save_minimum_order_field_for_variations', 10, 2);
function save_minimum_order_field_for_variations($variation, $i) {
    $minimum_order = isset($_POST['minimum_order'][$i]) ? esc_attr($_POST['minimum_order'][$i]) : '';
    $variation->update_meta_data('minimum_order', $minimum_order);
}

// Utility function: Get the lowest min order
function get_lowest_minimum_order() {
    $data_array = []; // Initializing

    // Loop through cart items
    foreach ( WC()->cart->get_cart() as $item ) {
        $min_order = $item['data']->get_meta('minimum_order');

        if ( empty($min_order) && $item['variation_id'] > 0 ) {
            // if variation minimum order is not defined take the parent product minimum order  
            $min_order = get_post_meta($item['product_id'], 'minimum_order', true);
        }

        if ( ! empty($min_order) ) {
            $data_array[] = $min_order;
        }
    }
    return min($data_array);
}

// Cart items validation
add_action( 'woocommerce_check_cart_items', 'minimum_order_cart_items_validation' );
function minimum_order_cart_items_validation() {
    $minimum_order    = get_lowest_minimum_order();
    $cart_total_count = WC()->cart->get_cart_contents_count();

    if ( ! empty($minimum_order) && $cart_total_count < $minimum_order ) {
        wc_add_notice(sprintf('The minimum order total items quantity must be %s.', $minimum_order), 'error');
    }
}

代码位于您的子主题的unctions.php文件中(或在插件中).应该能行得通.

如果您要根据**最大最小订单设置最小订单总数量，只需更改:

return min($data_array);

致:

return max($data_array);