php - 如果 WooCommerce 购物车至少包含 X 产品，则自动添加百分比折扣

Question

我正在尝试创建一个自动折扣，该折扣会在购物车包含至少三种或更多产品时生效。

如果是，无论客户是否登录，都应给予 10% 的折扣。

这是我试图开始工作的代码(没有成功)。

add_action( 'woocommerce_cart_calculate_fees', 'wc_discount_when_more_than_three', 10, 1 );
function wc_discount_when_more_than_three( $cart ) {

    if ( is_admin() && ! defined( 'DOING_AJAX' ) )

        return;

    $percentage = 10; // 10% discount when cart has a minimum of three products
    $discount = 0;

    // check all cart items
    foreach ( $cart->get_cart() as $cart_item ) {

    // when quantity is more than 3
    if( $cart_item['quantity'] > 3 ) {

    // give 10% discount on the subtotal
    $discount = $percentage / 100;
    }
}
    
    if( $discount > 0 )
    $cart->add_fee( __( '10% OFF', 'woocommerce' ) , -$discount );
}

Answer 1

这取决于您是要统计购物车中的产品数量还是要统计产品数量(内容)。

在我的回答中，我已经说明了两者，取消注释/删除/调整您的需求。

function action_woocommerce_cart_calculate_fees( $cart ) {
    if ( is_admin() && ! defined( 'DOING_AJAX' ) )
        return;
    
     // Percentage
    $percentage = 10;

    /* Count contents in cart
     *
     * Product A: quantity in cart: 4 
     * Product B: quantity in cart: 1 
     * Product C: quantity in cart: 2
     *
     * count = 7
     *
     */
    //$count = $cart->cart_contents_count;
    
    /* Count products in cart
     *
     * Product A
     * Product B 
     * Product C
     *
     * count = 3
     */
    $count = count( $cart->get_cart() );
    
    // Greater than
    if ( $count > 3 ) {
        // Get subtotal
        $subtotal = $cart->subtotal;
        
        // Calculate
        $discount = ( $subtotal / 100 ) * $percentage;
        
        // Give % discount on the subtotal
        $cart->add_fee( sprintf( __( '%s OFF', 'woocommerce'), $percentage . '%' ), -$discount );
    }
}
add_action( 'woocommerce_cart_calculate_fees', 'action_woocommerce_cart_calculate_fees', 10, 1 );