woocommerce_add_to_cart_fragments您的功能中缺少过滤器挂钩…
要使其正常工作，应为：
add_filter( 'woocommerce_add_to_cart_fragments', 'header_add_to_cart_fragment', 30, 1 );function header_add_to_cart_fragment( $fragments ) { global $woocommerce; ob_start(); ?> <a href="<?php echo esc_url(wc_get_cart_url()); ?>" title="<?php _e('View your shopping cart', 'woothemes'); ?>"><?php echo sprintf(_n('%d item', '%d items', $woocommerce->cart->cart_contents_count, 'woothemes'), $woocommerce->cart->cart_contents_count);?> - <?php echo $woocommerce->cart->get_cart_total(); ?></a> <?php $fragments['a.cart-customlocation'] = ob_get_clean(); return $fragments;}代码进入您的活动子主题（或活动主题）的function.php文件中。未经测试。
