以下均测试通过

nginx

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

apached

<IfModule mod_rewrite.c>
  Options +FollowSymlinks -Multiviews
  RewriteEngine On

  RewriteCond %{REQUEST_FILENAME} !-d
  RewriteCond %{REQUEST_FILENAME} !-f
  RewriteRule ^(.*)$ index.php [L,E=PATH_INFO:$1]
</IfModule>