if (!-e $request_filename) {
rewrite  ^/categories(.*)$  /categories.php?$1  last;
rewrite  ^/articles(.*)$  /articles.php?$1  last;
rewrite  ^/pages(.*)$  /pages.php?$1  last;
rewrite  ^/blogs(.*)$  /blogs.php?$1  last;
rewrite  ^/news(.*)$  /news.php?$1  last;
rewrite  ^/authors(.*)$  /authors.php?$1  last;
rewrite  ^/search(.*)$  /search.php?$1  last;
rewrite  ^/articlerss(.*)$  /articlerss.php?$1  last;
rewrite  ^/contact(.*)$  /contact.php?$1  last;
rewrite  ^/blogrss(.*)$  /blogrss.php?$1  last;
rewrite  ^/newsrss(.*)$  /newsrss.php?$1  last;
break;
}