When using mysqli to connect to the database, an error is reported, but the connection can be made by replacing it with mysql_connect.

There is a virtual host on Alibaba. I wrote a small program and wanted to run it on it. The code uses mysqli to connect to the database and reports an error, but it can be connected by using mysql_connect.
Mysqli connection error message:
Warning: mysqli::mysqli(): (HY000/1044): Access denied for user 'qdm177116231'@'%' to database 'data' in D:Xampphtdocstest.php on line 475

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There is a virtual host on Alibaba. I wrote a small program and wanted to run it on it. The code uses mysqli to connect to the database and reports an error, but it can be connected by using mysql_connect.
Mysqli connection error message:
Warning: mysqli::mysqli(): (HY000/1044): Access denied for user 'qdm177116231'@'%' to database 'data' in D:Xampphtdocstest.php on line 475

At least post the code. It may be that you filled it in wrong or you don’t have enough permissions

qdm177116231'@'%
Check the user table to see if the user has permission to access the host~~~

The database user qdm177116231 has insufficient permissions. You can use navicat to update the user and it should be fine