I would like to use something like http://www.gametracker.com/server_info/85.236.109.200:20467/top_players/?searchipp=50#search but then with real player stats (from like BFBCS or Statsverse) from only one server.

Is there an XML file being parsed of this list or is there an API available for this? If so, I can write a PHP script for it, which adds the player into an ezStats installation.

I've tried Google, but I can only find PHP scripts who give actual information about the server, not like the list from the link above.

All I would like to do is having the player stats from all players who ever have played on a server.

There is currently no feeds available. In the future there should be xml feeds, however I am not sure if there would be one for the full server player list.