Apache：

<IfModule mod_rewrite.c>
        RewriteEngine on
        RewriteCond %{REQUEST_FILENAME} !-d
        RewriteCond %{REQUEST_FILENAME} !-f
        RewriteRule ^(.*)$ index.php?s=/$1 [QSA,PT,L]
    </IfModule>

Nginx:

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