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

  RewriteCond %{REQUEST_FILENAME} !-d
  RewriteCond %{REQUEST_FILENAME} !-f
  RewriteRule ^(.*)$ index.PHP?/$1 [QSA,PT,L]
</IfModule>

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