WooCommerce：访问特定页面时自动将产品添加到购物车

add_action( 'wp', 'bbloomer_add_product_to_cart_on_page_id_load' );
  
function bbloomer_add_product_to_cart_on_page_id_load() {
          
   // product ID to add to cart
   $product_id = 21874;
 
   // page ID to target         
   if ( is_page( 19473 ) ) {    
      WC()->cart->empty_cart();
      WC()->cart->add_to_cart( $product_id ); 
   }
    
}