长.htaccess RewriteRules

Question

我如何获得

  

http://nebulaproject.net/forum/topic/1

变成

  

http://nebulaproject.net/forum/topic.php?id=1

我想，

RewriteRule ^/forum/topic/(.*) /forum/topic.php?id=$1 [L]

或

RewriteRule ^/forum/(.*)/(.*) /forum/$1.php?id=$2 [L]

可能有用，但......没有运气。我还有其他RewriteRules设置，例如/players/Haribo98到/player/index.php?username=Haribo98