Database-Usage of function mysql_connect

mysql database

Could you please tell me how to fill in its parameters, thank you!误 Display this:
Error ：SQL query:

Create DataBase Message Charsage Charset UTF8;

Mysql Return:
#1044 -Access Denied for User 'ZCG123456'@'to DataBase e '

Reply content : Access denied, access is denied

The connection string is not written correctly. Your account password is incorrect. Is the username zcg123456? Why is the machine name %? It is obviously wrong