php 在 Woocommerce 中以编程方式应用优惠券
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Apply a coupon programmatically in Woocommerce
提问by msargenttrue
In Woocommerce I'm trying to find a way to apply a 10% discount to an entire customer's order if the weight in the cart is over 100 lbs. I'm partway to achieving this. For the next step, I'm looking for a way to programmatically apply a coupon code via action/hook through functions.php.
在 Woocommerce 中，如果购物车中的重量超过 100 磅，我试图找到一种方法来对整个客户的订单应用 10% 的折扣。我正在实现这一目标。对于下一步，我正在寻找一种方法，通过函数.php 通过操作/挂钩以编程方式应用优惠券代码。
It appears that I can use the function woocommerce_ajax_apply_coupon to do this ( http://docs.woothemes.com/wc-apidocs/function-woocommerce_ajax_apply_coupon.html) but I am unsure of how to use it.
看来我可以使用函数 woocommerce_ajax_apply_coupon 来做到这一点（http://docs.woothemes.com/wc-apidocs/function-woocommerce_ajax_apply_coupon.html），但我不确定如何使用它。
So far I've modified cart.php to get the total weight of all the products in the cart, I've created a coupon that applies the discount (if entered manually) and I've added some code to functions.php to check the weight and display a message to the user.
到目前为止，我已经修改了 cart.php 以获取购物车中所有产品的总重量，我已经创建了一个应用折扣的优惠券（如果手动输入），并且我已经向functions.php 添加了一些代码以进行检查重量并向用户显示消息。
EDIT: Partial code removed, completed code included in the solution below.
编辑：部分代码已删除，完成的代码包含在下面的解决方案中。
Thanks for the guidance Freney. Here's the working end result which successfully applies the discount coupon when the condition is met and also removes it when it's no longer met:
感谢弗雷尼的指导。这是在满足条件时成功应用折扣优惠券并在不再满足时将其删除的工作最终结果：
/* Mod: 10% Discount for weight greater than 100 lbs
Works with code added to child theme: woocommerce/cart/cart.php lines 13 - 14: which gets $total_weight of cart:
global $total_weight;
$total_weight = $woocommerce->cart->cart_contents_weight;
*/
add_action('woocommerce_before_cart_table', 'discount_when_weight_greater_than_100');
function discount_when_weight_greater_than_100( ) {
global $woocommerce;
global $total_weight;
if( $total_weight > 100 ) {
$coupon_code = '999';
if (!$woocommerce->cart->add_discount( sanitize_text_field( $coupon_code ))) {
$woocommerce->show_messages();
}
echo '<div class="woocommerce_message"><strong>Your order is over 100 lbs so a 10% Discount has been Applied!</strong> Your total order weight is <strong>' . $total_weight . '</strong> lbs.</div>';
}
}
/* Mod: Remove 10% Discount for weight less than or equal to 100 lbs */
add_action('woocommerce_before_cart_table', 'remove_coupon_if_weight_100_or_less');
function remove_coupon_if_weight_100_or_less( ) {
global $woocommerce;
global $total_weight;
if( $total_weight <= 100 ) {
$coupon_code = '999';
$woocommerce->cart->get_applied_coupons();
if (!$woocommerce->cart->remove_coupons( sanitize_text_field( $coupon_code ))) {
$woocommerce->show_messages();
}
$woocommerce->cart->calculate_totals();
}
}
回答by Freney
First, create a discount coupon (via http://docs.woothemes.com/document/create-a-coupon-programatically/):
首先，创建优惠券（通过http://docs.woothemes.com/document/create-a-coupon-programatically/）：
$coupon_code = 'UNIQUECODE'; // Code - perhaps generate this from the user ID + the order ID
$amount = '10'; // Amount
$discount_type = 'percent'; // Type: fixed_cart, percent, fixed_product, percent_product
$coupon = array(
'post_title' => $coupon_code,
'post_content' => '',
'post_status' => 'publish',
'post_author' => 1,
'post_type' => 'shop_coupon'
);
$new_coupon_id = wp_insert_post( $coupon );
// Add meta
update_post_meta( $new_coupon_id, 'discount_type', $discount_type );
update_post_meta( $new_coupon_id, 'coupon_amount', $amount );
update_post_meta( $new_coupon_id, 'individual_use', 'no' );
update_post_meta( $new_coupon_id, 'product_ids', '' );
update_post_meta( $new_coupon_id, 'exclude_product_ids', '' );
update_post_meta( $new_coupon_id, 'usage_limit', '1' );
update_post_meta( $new_coupon_id, 'expiry_date', '' );
update_post_meta( $new_coupon_id, 'apply_before_tax', 'yes' );
update_post_meta( $new_coupon_id, 'free_shipping', 'no' );
Then apply that coupon to your order:
然后将该优惠券应用于您的订单：
if (!$woocommerce->cart->add_discount( sanitize_text_field( $coupon_code )))
$woocommerce->show_messages();
That last function returns a BOOL value: TRUE if the discount was successful, FALSE if it fails for any one of a variety of reasons.
最后一个函数返回一个 BOOL 值：如果折扣成功，则为 TRUE，如果由于各种原因中的任何一个而失败，则为 FALSE。
回答by Brandon
I used this solution, but it contains a bug as the OP wrote it. If the user skips previewing the cart and goes straight to the checkout form, it does not apply the coupon. Here was my solution.
我使用了这个解决方案，但它包含 OP 编写的错误。如果用户跳过预览购物车并直接进入结帐表单，则不会应用优惠券。这是我的解决方案。
// Independence day 2013 coupon auto add
// Add coupon when user views cart before checkout (shipping calculation page).
add_action('woocommerce_before_cart_table', 'add_independence_day_2013_coupon_automatically');
// Add coupon when user views checkout page (would not be added otherwise, unless user views cart first).
add_action('woocommerce_before_checkout_form', 'add_independence_day_2013_coupon_automatically');
// Check if php function exists. If it doesn't, create it.
if (!function_exists('add_independence_day_2013_coupon_automatically')) {
function add_independence_day_2013_coupon_automatically() {
global $woocommerce;
$coupon_code = 'independencedaysale';
$bc_coupon_start_date = '2013-06-30 17:00:00';
$bc_coupon_end_date = '2013-07-08 06:59:59';
// Only apply coupon between 12:00am on 7/1/2013 and 11:59pm on 7/7/2013 PST.
if ((time() >= strtotime($bc_coupon_start_date)) &&
(time() <= strtotime($bc_coupon_end_date))) {
// If coupon has been already been added remove it.
if ($woocommerce->cart->has_discount(sanitize_text_field($coupon_code))) {
if (!$woocommerce->cart->remove_coupons(sanitize_text_field($coupon_code))) {
$woocommerce->show_messages();
}
}
// Add coupon
if (!$woocommerce->cart->add_discount(sanitize_text_field($coupon_code))) {
$woocommerce->show_messages();
} else {
$woocommerce->clear_messages();
$woocommerce->add_message('Independence day sale coupon (10%) automatically applied');
$woocommerce->show_messages();
}
// Manually recalculate totals. If you do not do this, a refresh is required before user will see updated totals when discount is removed.
$woocommerce->cart->calculate_totals();
} else {
// Coupon is no longer valid, based on date. Remove it.
if ($woocommerce->cart->has_discount(sanitize_text_field($coupon_code))) {
if ($woocommerce->cart->remove_coupons(sanitize_text_field($coupon_code))) {
$woocommerce->show_messages();
}
// Manually recalculate totals. If you do not do this, a refresh is required before user will see updated totals when discount is removed.
$woocommerce->cart->calculate_totals();
}
}
}
}
回答by LoicTheAztec
2017 / 2019since Woocommerce 3
2017 / 2019自 Woocommerce 3
The following compact code in one hooked function will add a discount (coupon) based on cart total weight displaying a custom message. If customer changes cart items the code will check cart items removing the discount (coupon) if the cart weight is under the defined weight.
一个挂钩函数中的以下紧凑代码将根据显示自定义消息的购物车总重量添加折扣（优惠券）。如果客户更改购物车项目，如果购物车重量低于定义的重量，代码将检查购物车项目并删除折扣（优惠券）。
The code:
编码：
add_action('woocommerce_before_calculate_totals', 'discount_based_on_weight_threshold');
function discount_based_on_weight_threshold( $cart ) {
if ( is_admin() && ! defined( 'DOING_AJAX' ) )
return;
if ( did_action( 'woocommerce_before_calculate_totals' ) >= 2 )
return;
// Your settings
$coupon_code = 'onweight10'; // Coupon code
$weight_threshold = 100; // Total weight threshold
// Initializing variables
$total_weight = $cart->get_cart_contents_weight();
$applied_coupons = $cart->get_applied_coupons();
$coupon_code = sanitize_text_field( $coupon_code );
// Applying coupon
if( ! in_array($coupon_code, $applied_coupons) && $total_weight >= $weight_threshold ){
$cart->add_discount( $coupon_code );
wc_clear_notices();
wc_add_notice( sprintf(
__("Your order is over %s so a %s Discount has been Applied! Your total order weight is %s.", "woocommerce"),
wc_format_weight( $weight_threshold ), '10%', '<strong>' . wc_format_weight( $total_weight ) . '</strong>'
), "notice");
}
// Removing coupon
elseif( in_array($coupon_code, $applied_coupons) && $total_weight < $weight_threshold ){
$cart->remove_coupon( $coupon_code );
}
}
Code goes in function.php file of your active child theme (or active theme). Tested and works.
代码位于活动子主题（或活动主题）的 function.php 文件中。测试和工作。
