location ~* (runtime|application)/{

    return 403;

}

location ~* \.html$ {

  if (-e "$document_root/acdn$request_uri.php") {

      # 文件存在

      rewrite ^(.*)$ /acdn$1.php last;

      break;

  }  

  if (!-e $request_filename){

      rewrite  ^(.*)$  /index.php?s=$1  last;   

      break;

  }

}

location / {

    if (!-e $request_filename){

        rewrite  ^(.*)$  /index.php?s=$1  last;   break;

    }

}