在Woocommerce中,我使用jQuery计算单个产品页面上的自定义价格,现在需要将此值传递给购物车.

期望的行为是将从隐藏字段检索的新价格传递到购物车商品价格.

这是我的实际代码：

// Hidden input field in single product page
add_action( 'woocommerce_before_add_to_cart_button', 'custom_hidden_product_field', 11, 0 );
function custom_hidden_product_field() {
    echo '<input type="hidden" id="hidden_field" name="custom_price" class="custom_price" value="">';
}


// The code to pass this data to the cart:
add_action( 'woocommerce_add_cart_item_data', 'save_custom_fields_data_to_cart', 10, 2 );
function save_custom_fields_data_to_cart( $cart_item_data, $product_id ) {

    if( ! empty( $_REQUEST['custom_price'] ) ) {
        // Set the custom data in the cart item
        $cart_item_data['custom_data']['custom_price'] = $_REQUEST['custom_price'];
        $data = array( 'custom_price' => $_REQUEST['custom_price'] );

        // below statement make sure every add to cart action as unique line item
        $cart_item_data['custom_data']['unique_key'] = md5( microtime().rand() );
        WC()->session->set( 'custom_data', $data );
    }
    return $cart_item_data;
}

并检查$data和$cart_item_data,看看它们是否都返回在页面上计算的custom_price数据.

但是,我去查看购物车,订单项的值仍为0.

我将var设置为等于WC() – > session-> set(‘custom_data’,$data);然后var_dump来检查它,但是这会返回NULL,这可能只是它返回的,我不完全确定,因为我从来没有使用它.

我还应该补充一点,我将产品后端的regular_price设置为0.当我擦除它(并将其留空)时,我得到了错误：

Warning: A non-numeric value encountered in
C:\xampp\htdocs\my-transfer-source\wp-content\plugins\woocommerce\includes\class-wc-discounts.php on line 85

我想知道我是否在这里遗漏了一些东西,如果有人可以为此提供一些启示？谢谢

解决方法:

首先出于测试目的,我们在隐藏输入字段中添加价格,因为您没有给出计算价格的代码：

// Add a hidden input field (With a value of 20 for testing purpose)
add_action( 'woocommerce_before_add_to_cart_button', 'custom_hidden_product_field', 11 );
function custom_hidden_product_field() {
    echo '<input type="hidden" id="hidden_field" name="custom_price" class="custom_price" value="20">'; // Price is 20 for testing
}

然后,您将使用以下内容更改购物车项目价格(不需要WC_Session)：

// Save custom calculated price as custom cart item data
add_filter( 'woocommerce_add_cart_item_data', 'save_custom_fields_data_to_cart', 10, 2 );
function save_custom_fields_data_to_cart( $cart_item_data, $product_id ) {

    if( isset( $_POST['custom_price'] ) && ! empty( $_POST['custom_price'] )  ) {
        // Set the custom data in the cart item
        $cart_item_data['custom_price'] = (float) sanitize_text_field( $_POST['custom_price'] );

        // Make each item as a unique separated cart item
        $cart_item_data['unique_key'] = md5( microtime().rand() );
    }
    return $cart_item_data;
}

// Updating cart item price
add_action( 'woocommerce_before_calculate_totals', 'change_cart_item_price', 30, 1 );
function change_cart_item_price( $cart ) {
    if ( ( is_admin() && ! defined( 'DOING_AJAX' ) ) )
        return;

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

    // Loop through cart items
    foreach ( $cart->get_cart() as $cart_item ) {
        // Set the new price
        if( isset($cart_item['custom_price']) ){
            $cart_item['data']->set_price($cart_item['custom_price']);
        }
    }
}

代码位于活动子主题(或活动主题)的function.php文件中.经过测试和工作.

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