nginx 配置增加了try_files $uri $uri.php$is_args$args;一行后，直接訪問(wèn)域名就報(bào)錯(cuò)誤403 Forbidden，去掉這行才可以，我要保留try_files的配置，請(qǐng)問(wèn)該如何修改？

server
    {
        listen 80;
        server_name www.aaa.com;
        index index.html index.htm index.php default.html default.htm;
        root  /home/wwwroot/app_htx;

        include none.conf;
        include enable-php.conf;

        location ~ .*\.(gif|jpg|jpeg|png|bmp|swf)$
        {
            expires      30d;
        }

        location ~ .*\.(js|css)?$
        {
            expires      12h;
        }

        location ~ /\.
        {
            deny all;
        }

        location / {
                try_files $uri $uri.php$is_args$args;
        }

        access_log  /home/wwwlogs/access.log;
    }

目前估計(jì)是去找.php這個(gè)文件了，沒(méi)有找到就報(bào)錯(cuò)了，如何修改配置，判斷url只有域名或者目錄情況就不執(zhí)行該配置