PHP MySQL User Manager: Manage users that access a MySQL database server

This class can manage users that access a MySQL database server.

It can perform several operations with users with permissions to access databases on a MySQL server. Currently it can:

- Check if a given user exists
- Retrieve the details of a given user
- Create a new user with a given password
- Delete existing user permission to access from a host
- Retrieve granted permissions of an user to access from a host
- Set the password for an user accessing from a host
- Change the host of a user access permission
- Grant or remove privileges for an user to access given database tables