Online Access of Journals Recently I got myself enrolled in a PhD programme.

I want to know whether there is any website where one can get registered and get access to various different sites for journals like Jstor, Science Direct etc. I can’t access these sites outside of my university, although my college ID lets me access them from the campus. I am doing this course part-time, so I can’t always be inside the campus.

If I can get a common ID by paying some fee, I am ready for that. But that common login ID should work on different sites. Please let me know if there is any method.
I don't know if it is the case at all universities, but at least at mine, journal access is tied to a specific IP range - as long as one connects to the internet within the campus, they can freely access the journals. However, the only way to gain access from elsewhere is through our university's VPN.

You should try asking at your university if they have something like that set up and available for students, but it's possible that they don't.