WooCommerce：自定义功能添加免费产品 - 订单高达 3000 的购物车页面被破坏

Question

只要我将产品添加到购物车，WooCommerce 购物车页面就会中断如果购物车的价值超过 3000。

下面是我在我的主题 functions.php 中使用的代码：

add_action('woocommerce_check_cart_items', 'qualifies_for_incentive' );
// Cart's Total Excluding Taxes
function qualifies_for_incentive() {
    // Incentive product we are giving away
    $incentive_product_id = 6971;
    if( qualifies_basedon_cart_total( 250 ) ) {
        add_incentive_to_cart( $incentive_product_id );
    } else {
        remove_incentive_from_cart( $incentive_product_id );
    }

    if( qualifies_basedon_cart_total( 500 ) ) {
        add_incentive_to_cart( $incentive_product_id );
    }
    if( qualifies_basedon_cart_total( 750 ) ) {
        add_incentive_to_cart( $incentive_product_id );
    }
    if( qualifies_basedon_cart_total( 1000 ) ) {
        add_incentive_to_cart( $incentive_product_id );
    }
    if( qualifies_basedon_cart_total( 1250 ) ) {
        add_incentive_to_cart( $incentive_product_id );
    }
    if( qualifies_basedon_cart_total( 1500 ) ) {
        add_incentive_to_cart( $incentive_product_id );
    }
    if( qualifies_basedon_cart_total( 1750 ) ) {
        add_incentive_to_cart( $incentive_product_id );
    }
    if( qualifies_basedon_cart_total( 2000 ) ) {
        add_incentive_to_cart( $incentive_product_id );
    }
    if( qualifies_basedon_cart_total( 2250 ) ) {
        add_incentive_to_cart( $incentive_product_id );
    }
    if( qualifies_basedon_cart_total( 2500 ) ) {
        add_incentive_to_cart( $incentive_product_id );
    }
    if( qualifies_basedon_cart_total( 2750 ) ) {
        add_incentive_to_cart( $incentive_product_id );
    }
    if( qualifies_basedon_cart_total( 3000 ) ) {
        add_incentive_to_cart( $incentive_product_id );
    }
    if( qualifies_basedon_cart_total( 3250 ) ) {
        add_incentive_to_cart( $incentive_product_id );
    }
    if( qualifies_basedon_cart_total( 3500 ) ) {
        add_incentive_to_cart( $incentive_product_id );
    }
    if( qualifies_basedon_cart_total( 3750 ) ) {
        add_incentive_to_cart( $incentive_product_id );
    }
    if( qualifies_basedon_cart_total( 4000 ) ) {
        add_incentive_to_cart( $incentive_product_id );
    }
    if( qualifies_basedon_cart_total( 4250 ) ) {
        add_incentive_to_cart( $incentive_product_id );
    }
    if( qualifies_basedon_cart_total( 4500 ) ) {
        add_incentive_to_cart( $incentive_product_id );
    }
    if( qualifies_basedon_cart_total( 4750 ) ) {
        add_incentive_to_cart( $incentive_product_id );
    }
    if( qualifies_basedon_cart_total( 5000 ) ) {
        add_incentive_to_cart( $incentive_product_id );
    }
    if( qualifies_basedon_cart_total( 5250 ) ) {
        add_incentive_to_cart( $incentive_product_id );
    }
    if( qualifies_basedon_cart_total( 5500 ) ) {
        add_incentive_to_cart( $incentive_product_id );
    }
    if( qualifies_basedon_cart_total( 5750 ) ) {
        add_incentive_to_cart( $incentive_product_id );
    }
    if( qualifies_basedon_cart_total( 6000 ) ) {
        add_incentive_to_cart( $incentive_product_id );
    }
    if( qualifies_basedon_cart_total( 6250 ) ) {
        add_incentive_to_cart( $incentive_product_id );
    }
    if( qualifies_basedon_cart_total( 6500 ) ) {
        add_incentive_to_cart( $incentive_product_id );
    }
    if( qualifies_basedon_cart_total( 6750 ) ) {
        add_incentive_to_cart( $incentive_product_id );
    }
    if( qualifies_basedon_cart_total( 7000 ) ) {
        add_incentive_to_cart( $incentive_product_id );
    }
    if( qualifies_basedon_cart_total( 7250 ) ) {
        add_incentive_to_cart( $incentive_product_id );
    }
    if( qualifies_basedon_cart_total( 7500 ) ) {
        add_incentive_to_cart( $incentive_product_id );
    }
    if( qualifies_basedon_cart_total( 8000 ) ) {
        add_incentive_to_cart( $incentive_product_id );
    }
    if( qualifies_basedon_cart_total( 8250 ) ) {
        add_incentive_to_cart( $incentive_product_id );
    }
    if( qualifies_basedon_cart_total( 8500 ) ) {
        add_incentive_to_cart( $incentive_product_id );
    }
    if( qualifies_basedon_cart_total( 8750 ) ) {
        add_incentive_to_cart( $incentive_product_id );
    }
    if( qualifies_basedon_cart_total( 9000 ) ) {
        add_incentive_to_cart( $incentive_product_id );
    }
    if( qualifies_basedon_cart_total( 9250 ) ) {
        add_incentive_to_cart( $incentive_product_id );
    }
    if( qualifies_basedon_cart_total( 9500 ) ) {
        add_incentive_to_cart( $incentive_product_id );
    }
    if( qualifies_basedon_cart_total( 9750 ) ) {
        add_incentive_to_cart( $incentive_product_id );
    }
    if( qualifies_basedon_cart_total( 10000 ) ) {
        add_incentive_to_cart( $incentive_product_id );
    }
}

/**
 * Adds a specific product to the cart
 * @param $product_id Product to be added to the cart
*/
function add_incentive_to_cart( $product_id ) {
    // Check the cart for this product
    $cart_id = WC()->cart->generate_cart_id( $product_id );
    $prod_in_cart = WC()->cart->find_product_in_cart( $cart_id );
    // Add the product only if it's not in the cart already

    if( qualifies_basedon_cart_total( 250 ) ) {
        WC()->cart->remove_cart_item( $prod_in_cart );
        WC()->cart->add_to_cart( $product_id,1 );
    } else {
        remove_incentive_from_cart( $incentive_product_id );
    }
    if( qualifies_basedon_cart_total( 500 ) ) {
        WC()->cart->remove_cart_item( $prod_in_cart );
        WC()->cart->add_to_cart( $product_id,2 );
    } 
    if( qualifies_basedon_cart_total( 750 ) ) {
        WC()->cart->remove_cart_item( $prod_in_cart );
        WC()->cart->add_to_cart( $product_id,3 );
    } 
    if( qualifies_basedon_cart_total( 1000 ) ) {
        WC()->cart->remove_cart_item( $prod_in_cart );
        WC()->cart->add_to_cart( $product_id,4 );
    } 
    if( qualifies_basedon_cart_total( 1250 ) ) {
        WC()->cart->remove_cart_item( $prod_in_cart );
        WC()->cart->add_to_cart( $product_id,5 );
    } 
    if( qualifies_basedon_cart_total( 1500 ) ) {
        WC()->cart->remove_cart_item( $prod_in_cart );
        WC()->cart->add_to_cart( $product_id,6 );
    } 
    if( qualifies_basedon_cart_total( 1750 ) ) {
        WC()->cart->remove_cart_item( $prod_in_cart );
        WC()->cart->add_to_cart( $product_id,7 );
    } 
    if( qualifies_basedon_cart_total( 2000 ) ) {
        WC()->cart->remove_cart_item( $prod_in_cart );
        WC()->cart->add_to_cart( $product_id,8 );
    } 
    if( qualifies_basedon_cart_total( 2250 ) ) {
        WC()->cart->remove_cart_item( $prod_in_cart );
        WC()->cart->add_to_cart( $product_id,9 );
    } 
    if( qualifies_basedon_cart_total( 2500 ) ) {
        WC()->cart->remove_cart_item( $prod_in_cart );
        WC()->cart->add_to_cart( $product_id,10 );
    } 
    if( qualifies_basedon_cart_total( 2750 ) ) {
        WC()->cart->remove_cart_item( $prod_in_cart );
        WC()->cart->add_to_cart( $product_id,11 );
    } 
    if( qualifies_basedon_cart_total( 3000 ) ) {
        WC()->cart->remove_cart_item( $prod_in_cart );
        WC()->cart->add_to_cart( $product_id, 12);
    } 
    if( qualifies_basedon_cart_total( 3250 ) ) {
        WC()->cart->remove_cart_item( $prod_in_cart );
        WC()->cart->add_to_cart( $product_id,13 );
    } 
    if( qualifies_basedon_cart_total( 3500 ) ) {
        WC()->cart->remove_cart_item( $prod_in_cart );
        WC()->cart->add_to_cart( $product_id,14 );
    } 
    if( qualifies_basedon_cart_total( 3750 ) ) {
        WC()->cart->remove_cart_item( $prod_in_cart );
        WC()->cart->add_to_cart( $product_id,15 );
    } 
    if( qualifies_basedon_cart_total( 4000 ) ) {
        WC()->cart->remove_cart_item( $prod_in_cart );
        WC()->cart->add_to_cart( $product_id,16 );
    } 
    if( qualifies_basedon_cart_total( 4250 ) ) {
        WC()->cart->remove_cart_item( $prod_in_cart );
        WC()->cart->add_to_cart( $product_id,17 );
    } 
    if( qualifies_basedon_cart_total( 4500 ) ) {
        WC()->cart->remove_cart_item( $prod_in_cart );
        WC()->cart->add_to_cart( $product_id,18 );
    } 
    if( qualifies_basedon_cart_total( 4750 ) ) {
        WC()->cart->remove_cart_item( $prod_in_cart );
        WC()->cart->add_to_cart( $product_id,19 );
    }
    if( qualifies_basedon_cart_total( 5000 ) ) {
        WC()->cart->remove_cart_item( $prod_in_cart );
        WC()->cart->add_to_cart( $product_id,20 );
    } 
    if( qualifies_basedon_cart_total( 5250 ) ) {
        WC()->cart->remove_cart_item( $prod_in_cart );
        WC()->cart->add_to_cart( $product_id,21 );
    }
    if( qualifies_basedon_cart_total( 5500 ) ) {
        WC()->cart->remove_cart_item( $prod_in_cart );
        WC()->cart->add_to_cart( $product_id,22 );
    }
    if( qualifies_basedon_cart_total( 5750 ) ) {
        WC()->cart->remove_cart_item( $prod_in_cart );
        WC()->cart->add_to_cart( $product_id,23 );
    }
    if( qualifies_basedon_cart_total( 6000 ) ) {
        WC()->cart->remove_cart_item( $prod_in_cart );
        WC()->cart->add_to_cart( $product_id,24 );
    }
    if( qualifies_basedon_cart_total( 6250 ) ) {
        WC()->cart->remove_cart_item( $prod_in_cart );
        WC()->cart->add_to_cart( $product_id,25 );
    }
    if( qualifies_basedon_cart_total( 6500 ) ) {
        WC()->cart->remove_cart_item( $prod_in_cart );
        WC()->cart->add_to_cart( $product_id,26 );
    }
    if( qualifies_basedon_cart_total( 6750 ) ) {
        WC()->cart->remove_cart_item( $prod_in_cart );
        WC()->cart->add_to_cart( $product_id,27 );
    }
    if( qualifies_basedon_cart_total( 7000 ) ) {
        WC()->cart->remove_cart_item( $prod_in_cart );
        WC()->cart->add_to_cart( $product_id,28 );
    }
    if( qualifies_basedon_cart_total( 7250 ) ) {
        WC()->cart->remove_cart_item( $prod_in_cart );
        WC()->cart->add_to_cart( $product_id,29 );
    }
    if( qualifies_basedon_cart_total( 7500 ) ) {
        WC()->cart->remove_cart_item( $prod_in_cart );
        WC()->cart->add_to_cart( $product_id,30 );
    }
    if( qualifies_basedon_cart_total( 7750 ) ) {
        WC()->cart->remove_cart_item( $prod_in_cart );
        WC()->cart->add_to_cart( $product_id,31 );
    }
    if( qualifies_basedon_cart_total( 8000 ) ) {
        WC()->cart->remove_cart_item( $prod_in_cart );
        WC()->cart->add_to_cart( $product_id,32 );
    }
    if( qualifies_basedon_cart_total( 8250 ) ) {
        WC()->cart->remove_cart_item( $prod_in_cart );
        WC()->cart->add_to_cart( $product_id,33 );
    }
    if( qualifies_basedon_cart_total( 8500 ) ) {
        WC()->cart->remove_cart_item( $prod_in_cart );
        WC()->cart->add_to_cart( $product_id,34 );
    }
    if( qualifies_basedon_cart_total( 8750 ) ) {
        WC()->cart->remove_cart_item( $prod_in_cart );
        WC()->cart->add_to_cart( $product_id,35 );
    }
    if( qualifies_basedon_cart_total( 9000 ) ) {
        WC()->cart->remove_cart_item( $prod_in_cart );
        WC()->cart->add_to_cart( $product_id,36 );
    }
    if( qualifies_basedon_cart_total( 9250 ) ) {
        WC()->cart->remove_cart_item( $prod_in_cart );
        WC()->cart->add_to_cart( $product_id,37 );
    }
    if( qualifies_basedon_cart_total( 9500 ) ) {
        WC()->cart->remove_cart_item( $prod_in_cart );
        WC()->cart->add_to_cart( $product_id,38 );
    }
    if( qualifies_basedon_cart_total( 9750 ) ) {
        WC()->cart->remove_cart_item( $prod_in_cart );
        WC()->cart->add_to_cart( $product_id,39 );
    }
    if( qualifies_basedon_cart_total( 10000 ) ) {
        WC()->cart->remove_cart_item( $prod_in_cart );
        WC()->cart->add_to_cart( $product_id,40 );
    }

}

/**
 * Removes a specific product from the cart
* @param $product_id Product ID to be removed from the cart
 */
function remove_incentive_from_cart( $product_id ) {
    $prod_unique_id = WC()->cart->generate_cart_id( $product_id );
    // Remove it from the cart by un-setting it
    unset( WC()->cart->cart_contents[$prod_unique_id] );
}

/**
 * Checks the cart for the Total excluding taxes
 * @param $total_required
 * @return bool
 */
function qualifies_basedon_cart_total( $total_required ) {
    /*
     * We only want to run this on the cart or checkout page
     */
    if( is_cart() || is_checkout () ) {
        if( WC()->cart->subtotal >= $total_required ) {
            return true;
        }
    }
    // Return false in case anything fails
    //return false;
}

网站：http://qa.fastandup.in

我需要有关此问题的帮助。我做错了什么？

谢谢。

参考：WooCommerce Actions and Filters to Manipulate the Cart

Answer 1

缩短重复代码 带有 PHP FOR 循环的代码：

这并没有直接回答您的问题，但是您的代码很长而且多余。使用 简单的 php for loop，您可以 大大缩短 前两个功能...

您的代码似乎部分来自此线程：
Add a product to woocommerce cart if other cart items are in a specific category

更新：

然后我 MERGED 你的第一个钩子函数 qualifies_for_incentive() 中的所有代码。
因此下面的代码与您的所有代码（20 行无注释）完全相同：

add_action('woocommerce_check_cart_items', 'qualifies_for_incentive' );

function qualifies_for_incentive() { // Cart's Total Excluding Taxes
    if( ( is_cart() || is_checkout () ) {
        $free_product = 6971; // Incentive product we are giving away
        $cart_id = WC()->cart->generate_cart_id( $free_product ); // (equivalent to $prod_unique_id)
        $free_products_in_cart = WC()->cart->find_product_in_cart( $cart_id );
        $cart_amount = WC()->cart->subtotal;

        if( $cart_amount < 250 ) {
            // removing free product by unsetting it
            unset( WC()->cart->cart_contents[$cart_id] );
        }
        // The shortening "FOR LOOP": 
        // $amount goes by step of 250 until 10000 while 
        // $number is increased by 1 each step until 40.
        for( $amount = 250, $number=1; $amount <= 10000, $number<=40; $amount += 250, $number++ ){
            if( ( $cart_amount >= $amount ) {
                // Removing existing "free products" from the cart.
                WC()->cart->remove_cart_item( $free_products_in_cart ); 
                // Adding to cart a $number of free products 
                WC()->cart->add_to_cart( $free_product, $number );
            }
        } 
    }
}

这样可以避免在复习时迷失方向。
See it visually in action here.

这是通过回显 循环内的内容 与 php 文件生成的代码：

<html><head><title>The FOR loop in action (PHP)</title></head>
  <body>
 <p><br> - - - - - - - - - - - - - - - - - The FOR loop - - - - - - - - - - - - - - - - - <br></p>
 <div>
      <code><?php
     for( $amount = 250, $number=1; $amount <= 10000, $number<=40; $amount += 250, $number++ ){
    echo '
      if( $cart_amount >= $amount ) {
    WC()->cart->remove_cart_item( $free_products_in_cart ); <br>
    WC()->cart->add_to_cart( $free_product, '.$number.' ); <br>
      } <br>';
  }
    ?></code>
 </div>
 <p><br> - - - - - - - - - - - - - - - - - - - E N D  - - - - - - - - - - - - - - - - - - - <br></p>
  </body>
</html>

之后我将检查您的代码以了解您遇到此问题的原因...

Update2: 发现问题了，我觉得

说明：用你的代码，最高是购物车总金额，更多的购物车是通过多次重复删除和免费添加项目。所以当他赚到3000的时候，就破了……

为避免此问题，您需要在每个 if 语句中定义 "in between" 金额而不是仅最小数量。

这是我的新压缩代码(只有24行没有注释):

add_action('woocommerce_check_cart_items', 'qualifies_for_incentive' );

function qualifies_for_incentive() { // Cart's Total Excluding Taxes
    if( ( is_cart() || is_checkout () ) {
        $free_product = 6971; // Incentive product we are giving away
        $cart_id = WC()->cart->generate_cart_id( $free_product ); // (equivalent to $prod_unique_id)
        $free_products_in_cart = WC()->cart->find_product_in_cart( $cart_id );
        $cart_amount = WC()->cart->subtotal; // cart subtotal

        // Cart subtotal is less than 250
        if( $cart_amount < 250 ) {
            // removing free product by unsetting it
            unset( WC()->cart->cart_contents[$cart_id] );
        }
        // Cart amount is up to 249. 
        // The min amount $i begins at 250 and goes by step of 250 until 9750 while
        // the max amount $j begins at 500 and goes by step of 250 until 10000 while 
        // the quantity of free products $k increases by 1 each step until it reaches 39.
        for( $i = 250, $j = 500, $k = 1; $j <= 10000; $i += 250, $j += 250, $k++ ){

            // NOW THERE WILL BE NO MULTIPLE ADDINGS AND REMOVINGS   <=========== @@@
            // Dedfined "in between" values to avoid this issue.
            // For each step of 250 amount…
            if( $cart_amount >= $i && $cart_amount < $j ) {
                // Removing existing "free products" from the cart.
                WC()->cart->remove_cart_item( $free_products_in_cart ); 
                // Adding to cart a number $k of free products 
                WC()->cart->add_to_cart( $free_product, $k ); 
            }
        }
        // For cart amount up to 10000 The quantity is fixed: 40 free products
        if( $cart_amount >= 10000 ) {
            // Removing existing "free products" from the cart.
            WC()->cart->remove_cart_item( $free_products_in_cart ); 
            // Adding to cart 40 free products 
            WC()->cart->add_to_cart( $free_product, 40 );
        }
    }
}

这是我的代码所做的 visually in action here from the for loop。

这是通过回显 循环内的内容 与 php 文件生成的代码：

<html><head><title>The FOR loop in action (PHP)</title></head>
  <body>
 <p><br> - - - - - - - - - - - - - - - - - The FOR loop - - - - - - - - - - - - - - - - - <br></p>
 <div>
      <code><?php
     for( $i = 250, $j = 500, $k = 1; $j <= 10000; $i += 250, $j += 250, $k++ ){
    echo '
      if( $cart_amount >= '.$i.'  && $cart_amout < ( '.$j.' ) { <br>
       WC()->cart->remove_cart_item( $free_products_in_cart ); <br>
       WC()->cart->add_to_cart( $free_product, '.$k.' ); <br>
      } <br>';
  }
      echo '
      if( $cart_amount >= 10000 ) { <br>
       WC()->cart->remove_cart_item( $free_products_in_cart ); <br>
       WC()->cart->add_to_cart( $free_product, 40 ); <br>
      } <br>';
    ?></code>
 </div>
 <p><br> - - - - - - - - - - - - - - - - - - - E N D  - - - - - - - - - - - - - - - - - - - <br></p>
  </body>
</html>

WooCommerce：自定义功能添加免费产品 - 订单高达 3000 的购物车页面被破坏

WooCommerce: Custom function adding free product - Cart page getting broken for orders up to 3000

php

wordpress

product

cart

woocommerce