Need this htaccess url rewrite to Nginx rewrite

[escavern]

Helo my friends,

i have problem converting this .htaccess url rewrite to Nginx rewrite
rule,,
----------------------------------------------------------------------------------------------------------
RewriteEngine on
RewriteRule ^(index\.php)?([a-z0-9]+)$ index.php?$2 [L]
----------------------------------------------------------------------------------------------------------

any help will be appreciate ;-).
Thanks

Posted at Nginx Forum: http://forum.nginx.org/read.php?2,220385,220385#msg-220385