数据库连接失败!SQLSTATE[HY000] [2002] Connection refused
Fatal error: Uncaught Error: Call to a member function exec() on null in /www/wwwroot/www.news587.com/include/db.php:117 Stack trace: #0 /www/wwwroot/www.news587.com/include/db.php(70): Db->__construct(Array) #1 /www/wwwroot/www.news587.com/config.php(11): Db::getInstance(Array) #2 /www/wwwroot/www.news587.com/index.php(4): include('/www/wwwroot/ww...') #3 {main} thrown in /www/wwwroot/www.news587.com/include/db.php on line 117