WooCommerce产品页面添加Buy it now立即购买按钮

方法1.修改代码

WordPress后台-外观-主题编辑器-functions.php最后添加下面的代码：

function sbw_wc_add_buy_now_button_single()
{
    global $product;
    printf(
        '<button id="sbw_wc-adding-button" type="submit" name="sbw-wc-buy-now" value="%d" class="single_add_to_cart_button buy_now_button button alt" style="margin-right: 10px; margin-left: 10px;">%s</button>',
        $product->get_ID(),
        esc_html__('Buy Now', 'sbw-wc')
    );
}

add_action( 'woocommerce_after_add_to_cart_button', 'sbw_wc_add_buy_now_button_single' );



/*** Handle for click on buy now ***/
function sbw_wc_handle_buy_now()
{
    if ( !isset( $_REQUEST['sbw-wc-buy-now'] ) )
    {
        return false;
    }

    WC()->cart->empty_cart();

    $product_id = absint( $_REQUEST['sbw-wc-buy-now'] );
    $quantity = absint( $_REQUEST['quantity'] );

    if ( isset( $_REQUEST['variation_id'] ) ) {

        $variation_id = absint( $_REQUEST['variation_id'] );
        WC()->cart->add_to_cart( $product_id, 1, $variation_id );

    }else{
        WC()->cart->add_to_cart( $product_id, $quantity );
    }

    wp_safe_redirect( wc_get_checkout_url() );
    exit;
}

add_action( 'wp_loaded', 'sbw_wc_handle_buy_now' );

方法2.使用插件

在WordPress后台，安装Buy Now Button for WooCommerce插件并启用。