将此代码粘贴到活动主题函数下面。php文件

add_action( \'woocommerce_email_order_details\', \'order_date_email_hook\', 10, 4);

function order_date_email_hook( $order, $sent_to_admin, $plain_text, $email ){
    if ( $sent_to_admin ) 
    {
        echo \'<span>Order Date: \'.$order->get_date_created().\'</span>\';
      }
}