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Which editor you use doesn't really matter. You will need to learn some sort of server-side language if you want to build a game - like PHP, Perl, Ruby, Python, C#, or VB.Net. Which one you choose is up to you.
Php is first programming language i learned and it isent that hard. Think one of the easyer ones.If you want to learn php you should check out those 2 sites: W3C php tutorial and php.net.