I am in the pre-coding phase of creating a website. I know that it will be account based (users have to register/login to use the features). I also know that the server will have to do certain operations that are timer based, that is to say that user will have events that will trigger at a point chosen by the user and do something.

I am searching for a good choice in server-side technology, and was wondering what my options are and what the best choice is.

I would prefer open technology and something that doesn't use interpreted languages (Java, .net). My first thought is PHP + PGSQL for serverside and HTML+CSS+JS for clients, but I am still looking at my options.