Fatal error: Uncaught mysqli_sql_exception: Access denied for user 'root'@'localhost' (using password: YES) in /data/wwwroot/www.liulei.com.cn/book/include/conn.php:6 Stack trace: #0 /data/wwwroot/www.liulei.com.cn/book/include/conn.php(6): mysqli->__construct() #1 /data/wwwroot/www.liulei.com.cn/book/include/common.php(6): require('...') #2 /data/wwwroot/www.liulei.com.cn/book/index.php(4): require('...') #3 {main} thrown in /data/wwwroot/www.liulei.com.cn/book/include/conn.php on line 6