Server Browser like Game-Monitor.com

I want to make a server browser like http://game-monitor.com . Help me out in finding answers to the following questions:

1. where to start -- PHP or Java?

2. Can I display Latency/Ping with servers?

3. Is it possible to make using GWT (Google Web Toolk开发者_如何学Goit)?

You can use php sockets to measure server latency, and get data from the server. Depending on the type of game server (unreal engine ect.) There are php libraries written to do this, such as php server query ( A bit old but should at least give you a good idea). They get the response and parse it to get the information for users, current map ect.

I'm sure all of this is possible using Java as well I just personally have never tried it.