classes calling classes

[dombey]

I have a problem, I have created a class that connects to the database and queries, I need to use this class in other classes, if I instantiate the clas withen the another class,however, I am locked into the database that I selected.
Should I pass the database class into the object?
Scope problems basically

[mahers]

Is it possible to use inheritance?

class Myclass extends DatabaseClass {

}

[diego25]

I am locked into the database that I selected.

What do you mean by that?

Diego

[dombey]

I have 5 different databases that I could be accessing, so I have a default database, otherwize I can pass the name to the database class and it will connect to the correct databse. So I need to access the database class withen another class(say a scoring engine), but how to do this without having to change the coding for for the score engine class depending on which database I would like to hit?
Basically, I am having a hard time understanding the scope of classes. If I instantiate a class is it and its methods availabe to me within another class that I intantiate within the same script or do I actually have to instantiate the class within the second class in order for it and its methods to be availble for use withen the second class?
thank you for any help

[diego25]

The methods of a class will be available in the scope that the class has been instantiated. For example, if you instantiate a class in a function, the methods will only be available inside the function. If you instantiate a class inside the method of another class, the methods of the first class will be available only to the method of the second class.

Diego