Which scripting language should I learn?

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Hi, I am just starting to learn web design and do not know any scripting languages. I was wondering, in your guys’ opinion, what language should a newbie start learning first (other than html… Im looking more for server side.) I want to know based on which one has the most uses and is easy to learn? PHP? ASP? Something else? And can someone please tell me some uses for each? Thanks a lot! Also, how can I learn these languages without school? Is there a good website that teaches you or something? Thanks a lot!