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Hello!
Sorry for my English, I’m not an English-speaking user. I want to create a web service/web site, where are people can register their account and send some information (e.g. contacts) to each other. What should I know for this? Is it OK to know only HTML 5 and JavaScript? Or I also have to know PHP or Ajax?
I’m new in Web services/technologies, I’m studying them at the moment.