MYSQLi error: User already has more than 'max_user_connections' active connections
Probably the problem is that you have only a handful connections allowed and when your class tries to get a new connection you have this error.
This is not a programming problem, just quantity of resources available. And any other script that uses this class are subject to have the error.
You have to configure more connections on mysql config file on the server. If you don't have this access, ask the support to do it or change for a hosting company with more connections allowed!
Other option is to implement a Singleton pattern on this class, so it reuses same pool of connections, and don't explode the limit.
Check the MAX USER_CONNECTIONS setting on your MySQL server for the user. In PHPMyAdmin go to the server page (Click on the Server:<>) and in the sub-menu click on priviledges. Edit the user dbo343879423 and the MAX USER_CONNECTIONS will be on the right side. By default I believe it is set to 0 (unlimited), yours maybe restricted depending on who setup the server.
I'm not sure how your Database class is being used but if you are instantiating the class multiple times consider creating a private static variable Database in the database class and creating a public static method getDatabase() which instantiates the database connection if it is null and returns the instance.
If you get this max_user_connections message first optimize your database table.
How to optimize database table and query:
- Index your table field in mysql
- In select query remove `*` and write which you need field
- Closed mysql_connection