【待反馈】mysqli::__construct(): (HY000/1044)

Warning: mysqli::__construct(): (HY000/1044): Access denied for user 'helpfulstore15_c'@'localhost' to database 'helpfulstore15_com' in /www/wwwroot/helpfulstore15.com/system/library/db/mysqli.php on line 7Warning: DB\MySQLi::__construct(): Couldn't fetch mysqli in /www/wwwroot/helpfulstore15.com/system/library/db/mysqli.php on line 10Warning: DB\MySQLi::__construct(): Couldn't fetch mysqli in /www/wwwroot/helpfulstore15.com/system/library/db/mysqli.php on line 10
Fatal error: Uncaught Exception: Error: <br />Error No: in /www/wwwroot/helpfulstore15.com/system/library/db/mysqli.php:10 Stack trace: #0 /www/wwwroot/helpfulstore15.com/system/library/db.php(31): DB\MySQLi->__construct() #1 /www/wwwroot/helpfulstore15.com/system/framework.php(80): DB->__construct() #2 /www/wwwroot/helpfulstore15.com/system/startup.php(109): require_once('/www/wwwroot/he...') #3 /www/wwwroot/helpfulstore15.com/index.php(28): start() #4 {main} thrown in /www/wwwroot/helpfulstore15.com/system/library/db/mysqli.php on line 10

您好，检查您网站配置内的所指定数据库账户以及密码是否正确，如正确，就需要您检查PHP链接数据库的mysqli参数写法是否正常。

或者检查PHP版本过高或者过低导致mysqli函数不兼容导致报错

您好，有下面方面需要排查：
1、您的数据库helpfulstore15_c 是否有localhost权限去访问您的helpfulstore15_com 数据库？
使用helpfulstore15_c 账号密码登录 phpmyadmin 可以登录吗？
2、您的网站使用的php是否和当前的代码程序匹配？
您切换其他版本的php试试可以访问吗？