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wordpress woocommer 添加代码实现，点击按钮，将产品添加到购物车并且跳转到结账页面

案列代码1，解决的是普通产品的

//短代码生成按钮，传入短代码，点击直接到达结账页面
function add_product_to_cart_button($atts) {// 定义默认值$defaults = array('id' => null,'label' => '立即购买',);// 使用 shortcode_atts 处理用户传入的参数$atts = shortcode_atts($defaults, $atts, 'add_to_cart_button');// 获取参数值$product_id = $atts['id'];$button_label = $atts['label'];// 检查产品ID是否有效if (!$product_id || !is_numeric($product_id)) {return '无效的产品ID。';}// 生成按钮HTML$button_html = sprintf('<form class="add_to_cart_form" method="post" action="%s"><input type="hidden" name="action" value="add_to_cart_and_checkout" /><input type="hidden" name="product_id" value="%d" /><button type="submit" class="button">%s</button></form>',esc_url(admin_url('admin-post.php')),intval($product_id),esc_html($button_label));return $button_html;
}// 注册短代码
add_shortcode('add_to_cart_button', 'add_product_to_cart_button');function handle_add_to_cart_and_checkout() {// 确保 WooCommerce 环境已加载if (!function_exists('wc')) {include_once ABSPATH . 'wp-content/plugins/woocommerce/includes/wc-core-functions.php';}// 初始化 WooCommerce 购物车if (function_exists('wc_load_cart')) {wc_load_cart();}// 获取产品ID$product_id = isset($_POST['product_id']) ? intval($_POST['product_id']) : 0;// 检查产品ID是否有效if ($product_id > 0 && WC()->cart) {// 检查购物车中是否已经存在产品$cart_contains_product = false;foreach (WC()->cart->get_cart() as $cart_item_key => $cart_item) {if ($cart_item['product_id'] == $product_id) {// 如果购物车中已经存在相同的产品，则增加产品数量WC()->cart->set_quantity($cart_item_key, $cart_item['quantity'] + 1);$cart_contains_product = true;break;}}// 如果购物车中不存在相同的产品，则添加新产品到购物车if (!$cart_contains_product) {// 添加产品到购物车WC()->cart->add_to_cart($product_id);}}// 跳转到结账页面wp_safe_redirect(wc_get_checkout_url());exit;
}// 注册处理表单提交的操作
add_action('admin_post_nopriv_add_to_cart_and_checkout', 'handle_add_to_cart_and_checkout');
add_action('admin_post_add_to_cart_and_checkout', 'handle_add_to_cart_and_checkout');

在前台使用段代码

[add_to_cart_button id="213148" label="buy now"]

下面是案列代码2，解决的是复杂产品的

//短代码生成按钮，传入短代码，点击直接到达结账页面
function add_product_to_cart_button($atts) {// 定义默认值$defaults = array('id' => null,'label' => '立即购买',);// 使用 shortcode_atts 处理用户传入的参数$atts = shortcode_atts($defaults, $atts, 'add_to_cart_button');// 获取参数值$product_id = $atts['id'];$button_label = $atts['label'];// 检查产品ID是否有效if (!$product_id || !is_numeric($product_id)) {return '无效的产品ID。';}// 获取产品对象$product = wc_get_product($product_id);if (!$product) {return '产品不存在。';}// 如果产品是变体产品，获取变体信息$variation_fields = '';if ($product->is_type('variable')) {// 获取所有变体$available_variations = $product->get_available_variations();if (!empty($available_variations)) {$variation_fields .= '<select name="variation_id">';$variation_fields .= '<option value="">' . __('Choose an option', 'woocommerce') . '</option>';foreach ($available_variations as $variation) {$variation_id = $variation['variation_id'];$variation_label = implode(' / ', $variation['attributes']);$variation_fields .= '<option value="' . $variation_id . '">' . $variation_label . '</option>';}$variation_fields .= '</select>';}}// 生成按钮HTML$button_html = sprintf('<form class="add_to_cart_form" method="post" action="%s"><input type="hidden" name="action" value="add_to_cart_and_checkout" /><input type="hidden" name="product_id" value="%d" />%s<button type="submit" class="button">%s</button></form>',esc_url(admin_url('admin-post.php')),intval($product_id),$variation_fields,esc_html($button_label));return $button_html;
}// 注册短代码
add_shortcode('add_to_cart_button', 'add_product_to_cart_button');
function handle_add_to_cart_and_checkout() {// 确保 WooCommerce 环境已加载if (!function_exists('wc')) {include_once ABSPATH . 'wp-content/plugins/woocommerce/includes/wc-core-functions.php';}// 初始化 WooCommerce 购物车if (function_exists('wc_load_cart')) {wc_load_cart();}// 获取产品ID和变体ID$product_id = isset($_POST['product_id']) ? intval($_POST['product_id']) : 0;$variation_id = isset($_POST['variation_id']) ? intval($_POST['variation_id']) : 0;// 检查产品ID是否有效if ($product_id > 0 && WC()->cart) {// 添加产品到购物车WC()->cart->add_to_cart($product_id, 1, $variation_id);// 跳转到结账页面wp_safe_redirect(wc_get_checkout_url());exit;} else {// 如果产品ID无效，返回错误信息wp_die('无效的产品ID。');}
}// 注册处理表单提交的操作
add_action('admin_post_nopriv_add_to_cart_and_checkout', 'handle_add_to_cart_and_checkout');
add_action('admin_post_add_to_cart_and_checkout', 'handle_add_to_cart_and_checkout');

<style>
.add_to_cart_form {text-align: center;
}
.add_to_cart_form button {background-color: #1F2E5C;width:141px;color:#ffffff;height:46px;line-height:46px;margin:auto;margin-top:20px;
}
</style>