The two best journal databases for articles in philosophy are Philosopher's Index and Poiesis. If you want to use them off-campus, when you click on either of the links, you will first need to enter your Multipass username and password.
Another good general database that covers philosophy if JSTOR.
If you want to know how to find the full text of articles in these databases, see the following document: Finding Full Text
You can also find more database suggestions by going to the Philosophy & Religion databases page.