Woocommerce 3中的购物车项目数量累进百分比折扣

时间：2018-09-17 08:35:03

标签： php wordpress woocommerce cart discount

我正在尝试根据购物车中添加的商品数量对购物车中的所有商品给予总计购物车折扣。我已经从answer here中提取并修改了代码示例，并使大部分逻辑正常工作。

但是，我无法使其在以下两种情况下正常工作。它还仅将规则应用于购物车中的单个项目。不是整个购物车。

场景：

  • 如果购物车中没有任何物品在9至12之间，请为所有物品享受5％的折扣。
  • 如果购物车中的商品均不在13-16之间，则对所有商品应用10％的折扣。
  • 折扣不可叠加。例如购物车中有12件商品时，可享受5％的折扣...在添加13件商品时，应去除5％的折扣，并享受10％的折扣。

代码： 

add_filter('woocommerce_add_cart_item_data', 'add_items_default_price_as_custom_data', 20, 3 );
function add_items_default_price_as_custom_data( $cart_item_data, $product_id, $variation_id ){
    $product_id = $variation_id > 0 ? $variation_id : $product_id;

    ## ----- YOUR SETTING ----- ##
    $discount_percentage = 5; // Discount (5%)

    // The WC_Product Object
    $product = wc_get_product($product_id);

    // Only for non on sale products
    if( ! $product->is_on_sale() ){
        $price = (float) $product->get_price();

        // Set the Product default base price as custom cart item data
        $cart_item_data['base_price'] = $price;

        // Set the Product discounted price as custom cart item data
        $cart_item_data['new_price'] = $price * (100 - $discount_percentage) / 100;

        // Set the percentage as custom cart item data
        $cart_item_data['percentage'] = $discount_percentage;
    }

    return $cart_item_data;
}

// Display the product original price
add_filter('woocommerce_cart_item_price', 'display_cart_items_default_price', 20, 3 );
function display_cart_items_default_price( $product_price, $cart_item, $cart_item_key ){
    if( isset($cart_item['base_price']) ) {
        $product        = $cart_item['data'];
        $product_price  = wc_price( wc_get_price_to_display( $product, array( 'price' => $cart_item['base_price'] ) ) );
    }
    return $product_price;
}

// Display the product name with the discount percentage
add_filter( 'woocommerce_cart_item_name', 'append_percetage_to_item_name', 20, 3 );
function append_percetage_to_item_name( $product_name, $cart_item, $cart_item_key ){
    if( isset($cart_item['percentage']) && isset($cart_item['base_price']) ) {
        if( $cart_item['data']->get_price() != $cart_item['base_price'] )
            $product_name .= ' <em>(' . $cart_item['percentage'] . '% discounted)</em>';
    }
    return $product_name;
}

add_action( 'woocommerce_before_calculate_totals', 'custom_discounted_cart_item_price', 20, 1 );
function custom_discounted_cart_item_price( $cart ) {

    ## ----- YOUR SETTING ----- ##
    $balanced_qty = 9; // Targeted quantity
    $upper_balanced_qty = 12; // Max quantity limit
    // Loop through cart items
    foreach ( $cart->get_cart() as $cart_item ) {

        // For item quantity between 9 and 12
        if( ($cart_item['quantity'] >= $balanced_qty && isset($cart_item['new_price']) && ($cart_item['quantity'] <= $upper_balanced_qty) ) ){

            // Set cart item discounted price
            $cart_item['data']->set_price($cart_item['new_price']);
        }
    }
}

enter image description here

2 个答案:

答案 0 :(得分：1)

您可以按购物车项目数量进行选择，也可以根据购物车项目数进行全局选择：

1）按购物车项目数量： 

// Utility function that give the discount percentage based on quantity argument
function get_discount_percent( $quantity ){
    if( $quantity < 9 )
        $percent = 0;  // 0 %  ( quantity from 1 to 8 )
    elseif( $quantity >= 9 && $quantity < 13 )
        $percent = 5;  // 5 %  ( quantity from 9 to 12 )
    else
        $percent = 10; // 10 % ( quantity up to 13 )

    return $percent;
}


add_filter('woocommerce_add_cart_item_data', 'add_items_default_price_as_custom_data', 20, 3 );
function add_items_default_price_as_custom_data( $cart_item_data, $product_id, $variation_id ){
    $product_id = $variation_id > 0 ? $variation_id : $product_id;

    ## ----- YOUR SETTING ----- ##
    $percent_1 = 5; //  Discount (5%)
    $percent_2 = 10; // Discount (10%)

    // The WC_Product Object
    $product = wc_get_product($product_id);

    $price = (float) $product->get_price();

    // Set the Product default base price as custom cart item data
    $cart_item_data['discount'][0] = $price;

    // Set the Product discounted price of 5% as custom cart item data
    $cart_item_data['discount'][$percent_1] = $price * (100 - $percent_1) / 100;

    // Set the Product discounted price of 10% as custom cart item data
    $cart_item_data['discount'][$percent_2] = $price * (100 - $percent_2) / 100;

    return $cart_item_data;
}

// Display the product original price
add_filter('woocommerce_cart_item_price', 'display_cart_items_default_price', 20, 3 );
function display_cart_items_default_price( $product_price, $cart_item, $cart_item_key ){
    if( isset($cart_item['discount'][0]) ) {
        $product        = $cart_item['data'];
        $product_price  = wc_price( wc_get_price_to_display( $product, array( 'price' => $cart_item['discount'][0] ) ) );
    }
    return $product_price;
}

// Display the product name with the discount percentage
add_filter( 'woocommerce_cart_item_name', 'append_percetage_to_item_name', 20, 3 );
function append_percetage_to_item_name( $product_name, $cart_item, $cart_item_key ){
    // get the percent based on quantity
    $percent = get_discount_percent($cart_item['quantity']);

    if( isset($cart_item['discount'][$percent]) && isset($cart_item['discount'][0]) ) {
        if( $cart_item['data']->get_price() != $cart_item['discount'][0] )
            $product_name .= ' <em>(' . $percent . '% discounted)</em>';
    }
    return $product_name;
}

add_action( 'woocommerce_before_calculate_totals', 'set_custom_discount_cart_item_price', 25, 1 );
function set_custom_discount_cart_item_price( $cart ) {
    if ( is_admin() && ! defined( 'DOING_AJAX' ) )
        return;

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

    foreach( $cart->get_cart() as $cart_item ){
        // get the percent based on quantity
        $percentage = get_discount_percent($cart_item['quantity']);

        // For items non on sale set a discount based on quantity as defined in
        if( $percentage != 0 && isset($cart_item['discount'][$percentage]) && ! $cart_item['data']->is_on_sale() ) {
            $cart_item['data']->set_price($cart_item['discount'][$percentage]);
        }
    }
}

代码进入您的活动子主题（或活动主题）的function.php文件中。经过测试，可以正常工作。

enter image description here

2）全球购物车中的商品数量 （用于非促销产品）：

// Utility function that give the discount percentage based on quantity argument
function get_discount_percent( $quantity ){
    if( $quantity < 9 )
        $percent = 0;  // 0 %  ( quantity from 1 to 8 )
    elseif( $quantity >= 9 && $quantity < 13 )
        $percent = 5;  // 5 %  ( quantity from 9 to 12 )
    else
        $percent = 10; // 10 % ( quantity up to 13 )

    return $percent;
}

// Utility function that count cart items that are not on sale
function get_non_on_sale_cart_items_count(){
    $items_count = 0;
    foreach( WC()->cart->get_cart() as $cart_item ){
        if( ! $cart_item['data']->is_on_sale() ){
            $items_count += $cart_item['quantity'];
        }
    }
    return $items_count;
}


add_filter('woocommerce_add_cart_item_data', 'add_items_default_price_as_custom_data', 20, 3 );
function add_items_default_price_as_custom_data( $cart_item_data, $product_id, $variation_id ){
    $product_id = $variation_id > 0 ? $variation_id : $product_id;

    ## ----- YOUR SETTING ----- ##
    $percent_1 = 5; //  Discount (5%)
    $percent_2 = 10; // Discount (10%)

    // The WC_Product Object
    $product = wc_get_product($product_id);

    $price = (float) $product->get_price();

    // Set the Product default base price as custom cart item data
    $cart_item_data['discount'][0] = $price;

    // Set the Product discounted price of 5% as custom cart item data
    $cart_item_data['discount'][$percent_1] = $price * (100 - $percent_1) / 100;

    // Set the Product discounted price of 10% as custom cart item data
    $cart_item_data['discount'][$percent_2] = $price * (100 - $percent_2) / 100;

    return $cart_item_data;
}

// Display the product original price
add_filter('woocommerce_cart_item_price', 'display_cart_items_default_price', 20, 3 );
function display_cart_items_default_price( $product_price, $cart_item, $cart_item_key ){
    if( isset($cart_item['discount'][0]) ) {
        $product        = $cart_item['data'];
        $product_price  = wc_price( wc_get_price_to_display( $product, array( 'price' => $cart_item['discount'][0] ) ) );
    }
    return $product_price;
}

// Display the product name with the discount percentage
add_filter( 'woocommerce_cart_item_name', 'append_percetage_to_item_name', 20, 3 );
function append_percetage_to_item_name( $product_name, $cart_item, $cart_item_key ){
    // Get cart items count
    $items_count = get_non_on_sale_cart_items_count();

    // get the percent based on quantity
    $percent = get_discount_percent($items_count);

    if( isset($cart_item['discount'][$percent]) && isset($cart_item['discount'][0]) ) {
        if( $cart_item['data']->get_price() != $cart_item['discount'][0] )
            $product_name .= ' <em>(' . $percent . '% discounted)</em>';
        elseif ( $cart_item['data']->is_on_sale() && $percent != 0 ){
            $product_name .= ' <em>(Item on sale)</em>';
        }
    }
    return $product_name;
}

// Change cart item price
add_action( 'woocommerce_before_calculate_totals', 'set_custom_discount_cart_item_price', 25, 1 );
function set_custom_discount_cart_item_price( $cart ) {
    if ( is_admin() && ! defined( 'DOING_AJAX' ) )
        return;

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

    // Get cart items count
    $items_count = get_non_on_sale_cart_items_count();

    // get the percent based on quantity
    $percentage = get_discount_percent($items_count);

    foreach( $cart->get_cart() as $cart_item ){
        // For items non on sale set a discount based on quantity as defined in
        if( $percentage != 0 && isset($cart_item['discount'][$percentage]) && ! $cart_item['data']->is_on_sale() ) {
            $cart_item['data']->set_price($cart_item['discount'][$percentage]);
        }
    }
}

代码进入您的活动子主题（或活动主题）的function.php文件中。经过测试，可以正常工作。

  

在此示例中，下面是第三个商品正在销售，因此实际数量是10 + 1 = 11个商品，然后 11 个商品的折扣是 5% ：

     

enter image description here

答案 1 :(得分：0)

您可以通过应用负费用为整个购物车添加折扣。

请参阅：Apply a discount on the cart content total excluding taxes in WooCommerce

尝试下面的代码

add_action( 'woocommerce_before_calculate_totals', 'custom_discounted_cart_item_price', 20, 1 );
function custom_discounted_cart_item_price( $cart ) {
  $total_cart_items_count = $cart->get_cart_contents_count();
  $discount = null;

  // Apply 5% discount between 9 - 12 items
  if( $total_cart_items_count >= 9 && $total_cart_items_count <= 12 ) {
    // Calculate 5% of cart total
    $discount = $cart->get_cart_contents_total() * 5 / 100;
  }

  // Apply 10% discount between 13 - 16 items
  if( $total_cart_items_count >= 13 && $total_cart_items_count <= 16 ) {
    // Calculate 10% of cart total
    $discount = $cart->get_cart_contents_total() * 10 / 100;
  }

  if( !empty( $discount ) ) {
    $cart->add_fee(
      __( 'Discount', 'woocommerce' ) . '($percent%)',
      -$discount,
      false // TAX
    );
  }
}
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