Thanks Martin for your solution. But, is there another way to get these informations?
I must find a way for it, because it's not only me that is going to add the URL resources. There are going to be supervisors, teachers, and I am afraid that they can't handle it (setting the configurations, even I explaining it).
I was trying to get the informations through $COURSE->id, but it only gives me Moodle ID, and not the ID of the course, that is where I am and what I need