重写：Apache到Nginx

Question

有人可以告诉我，如何将下面的规则转换为nginx？

RewriteRule ^([^/]*)/?$ index.php?a=$1 [L,NC] 
RewriteRule ^([^/]*)/([^/]*)/?$ index.php?a=$1&b=$2 [L,NC] 
RewriteRule ^([^/]*)/([^/]*)/([^/]*)/?$ index.php?a=$1&b=$2&c=$3 [L,NC] 

Answer 1

http://wiki.nginx.org/HttpRewriteModule#rewrite