如何在WooCommerce产品页面添加优惠券

Question

I am using WordPress (4.9.8) with WooCommerce (3.4.5) and I would like to add a coupon field in single product pages. I've been looking at all Woocommerce templates, but I cannot find a way to add the Woocommerce coupon field onto the product page.

Any ideas?

I don't want to use a plugin for this.

Answer 1

The following code will add a custom text input field for coupon in single product pages before add to cart button.

If a coupon code is inputed in that field when the product will be added to cart, the coupon code will be applied to cart.

The code:

// Add a text input field inside the add to cart form
add_action('woocommerce_single_product_summary','add_custom_text_field_single_product', 2 );
function add_custom_text_field_single_product(){
    global $product;

    if( $product->is_type('variable') ){
        add_action('woocommerce_before_single_variation','custom_product_text_input_field', 30 );
    } else {
        add_action('woocommerce_before_add_to_cart_button','custom_product_text_input_field', 30 );
    }
}

function custom_product_text_input_field(){
    echo '<div class="hidden-field">
    <p class="form-row product-coupon form-row-wide" id="product-coupon_field" data-priority="">
        <label for="product-coupon" class="">' . __("Do you have a coupon code?") . '</label>
        <span class="woocommerce-input-wrapper">
            <input type="text" class="input-text " name="product-coupon" id="product-coupon" placeholder="'.__("Coupon code").'" value="">
        </span>
    </p></div>';
}

// Apply the coupon code from product custom text imput field
add_filter('woocommerce_add_cart_item_data', 'coupon_code_product_add_to_cart', 20, 3);
function coupon_code_product_add_to_cart($cart_item_data, $product_id, $variation_id) {
    if (isset($_POST['product-coupon']) && ! empty($_POST['product-coupon'])) {
        WC()->cart->apply_coupon( sanitize_title( $_POST['product-coupon'] ) );
    }
    return $cart_item_data;
}

Code goes in function.php file of your active child theme (or active theme). Tested and works.

If you want to have tha coupon field ajax powered, It's just more complicate and too broad for stack overflow on this question, without providing any code.