SQLSTATE[HY000] [2002] 由于目标计算机积极拒绝，无法连接。
Fatal error: Uncaught Error: Call to a member function prepare() on null in E:\www\php3688\showNewsList.php:3 Stack trace: #0 E:\www\news\list_news.htm(20): include() #1 {main} thrown in E:\www\php3688\showNewsList.php on line 3