买一送一,无优惠券代码

将此添加到“functions.php”的开头。

ob_start();
session_start();

然后添加此代码。

add_action( 'woocommerce_before_cart', 'bbloomer_apply_matched_coupons' );

function bbloomer_apply_matched_coupons() {

    if(!$_SESSION['GiftAdded']) {
        global $woocommerce;
        $cat_in_cart = false;
        $coupon_in_cart = false;

        $autocoupon = array( 123411 ); // variation ids of products that offers gifts
        $freecoupon = array( 2046 ); // variation ids of products that are gift coupons

        foreach ( $woocommerce->cart->cart_contents as $key => $values ) {      
            if( in_array( $values['variation_id'], $autocoupon ) ) {  
                $cat_in_cart = true;                
            }
            if( in_array( $values['variation_id'], $freecoupon) ) {  
                $coupon_in_cart = true;             
            }
        }

         if ( $cat_in_cart && !$coupon_in_cart ) {   
            $product_id   = 2044;
            $quantity     = 1;
            $variation_id = 2046;
            $variation    = array( 'pa_size'  => '30ml' );

            $woocommerce->cart->add_to_cart( $product_id, $quantity, $variation_id, $variation );
            $_SESSION['GiftAdded']=true;
        }
    }
}

这个 $_SESSION['GiftAdded'] 将阻止礼品产品在手动删除时再次添加。

当数量发生变化或产品从购物车中取出并将免费产品的价格设置为零时,根据数量使用它处理的另一个钩子还有另一种选择:

add_action( 'woocommerce_before_calculate_totals', 'add_free_product_to_cart', 20, 1 );
function add_free_product_to_cart( $cart ) {
    if ( is_admin() && ! defined( 'DOING_AJAX' ) )
        return;

    if ( did_action( 'woocommerce_before_calculate_totals' ) >= 2 )
        return;

    $products_ids = array( 123411 ); // Products IDs to check
    $free_var_id  = 2046; // free product (variation ID)
    $free_prod_id = 2044; // free product (product ID)
    $free_attr    = array( 'pa_size'  => 'medium' ); // Free product attribute
    $free_price   = 0;

    $targeted = $free = array('qty' => 0 ); // Initializing

    // Loop through cart items
    foreach ( $cart->get_cart() as $cart_item_key => $cart_item ) {
        if ( in_array( $cart_item['data']->get_id(), $products_ids ) ) {
            $targeted['qty'] += $cart_item['quantity'];
        } elseif ( $cart_item['data']->get_id() == $free_var_id ) {
            $cart_item['data']->set_price($free_price);
            $free['qty'] += $cart_item['quantity'];
            $free['key'] = $cart_item_key;
        }
    }
    // We exit (No changes are needed)
    if( $targeted['qty'] == $free['qty'] )
        return;

    if( $targeted['qty'] > 0 && $free['qty'] == 0 )
    {
        // Add the free product
        $cart->add_to_cart( $free_prod_id, $targeted['qty'], $free_var_id, $free_attr );
    }
    elseif(  $targeted['qty'] > 0 && $free['qty'] > 0 && $targeted['qty'] != $free['qty'] )
    {
        // Adjust free product quantity
        $cart->set_quantity( $free['key'], $targeted['qty'] );
    }
    elseif(  $targeted['qty'] == 0 && $free['qty'] > 0)
    {
        // Remove free product
        $cart->remove_cart_item( $free['key'] );
    }
}

代码放在活动子主题(或主题)的function.php文件或任何插件文件中。