location / {
 if (!-e $request_filename){
  rewrite  ^(.*)$  /index.php?s=$1  last;   break;
 }
}

#根目录下en目录下面的伪静态规则
location /en/ {
 if (!-e $request_filename){
  rewrite  ^/en/(.*)$  /en/index.php?s=$1  last;   break;
 }
}