配置根目录和地址重写

 location / {

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

注:依据网站后台地址重命名admin.php