Storing freshly created database credentials

Question

I'm creating a php application which creates a new database for each new registered user. How can I secure store the database credentials so it can be retrieved at user login.

• A core database with encrypted database credentials?
• Writing a file outside webroot? What about writing permissions?

Answer 1

我认为您必须创建一个“全局”数据库来存储凭证和与新数据库的关系。