Nginx - Php子目录文件不断重定向到主页

我似乎无法在任何地方找到适合我的情况的解决方案。我的nginx配置为使用bigbluebutton作为默认值，所以我设置了mysql和php来使用蓝色大按钮位置。我已经成功地让 php info 文件显示在文件的根目录中，但是如果我将文件放在子目录中，我会被重定向到根目录。子目录中的 html 文件不会发生这种情况，只有.php文件。最初我会在子目录中的 php 文件上得到一个 404，但现在我打开了短标签（即使没有使用，它会将我重定向到大蓝的根。对不起，我太菜鸟了，任何帮助都非常感谢。

server {
 listen   80;
 server_name  **.**.***.**;
 access_log  /var/log/nginx/bigbluebutton.access.log;
 # Handle RTMPT (RTMP Tunneling).  Forwards requests
 # to Red5 on port 5080
  location ~ (/open/|/close/|/idle/|/send/|/fcs/) {
      proxy_pass         http://127.0.0.1:5080;
      proxy_redirect     off;
      proxy_set_header   X-Forwarded-For   $proxy_add_x_forwarded_for;
      client_max_body_size       10m;
      client_body_buffer_size    128k;
      proxy_connect_timeout      90;
      proxy_send_timeout         90;
      proxy_read_timeout         90;
      proxy_buffering            off;
      keepalive_requests         1000000000;
  }
 # Handle desktop sharing tunneling.  Forwards
 # requests to Red5 on port 5080.
   location /deskshare {
       proxy_pass         http://127.0.0.1:5080;
       proxy_redirect     default;
       proxy_set_header   X-Forwarded-For   $proxy_add_x_forwarded_for;
       client_max_body_size       10m;
       client_body_buffer_size    128k;
       proxy_connect_timeout      90;
       proxy_send_timeout         90;
       proxy_read_timeout         90;
       proxy_buffer_size          4k;
       proxy_buffers              4 32k;
       proxy_busy_buffers_size    64k;
       proxy_temp_file_write_size 64k;
       include    fastcgi_params;
   }
# BigBlueButton landing page.
    location / {
      try_files $uri $uri/ /index.html;        
      root   /var/www/bigbluebutton-default;
      index index.php index.html index.htm;
  expires 1m;
    }
# Include specific rules for record and playback
    include /etc/bigbluebutton/nginx/*.nginx;
    error_page  404  /404.html;
    # Redirect server error pages to the static page /50x.html
    #
    error_page   500 502 503 504  /50x.html;
    location = /50x.html {
            root   /var/www/nginx-default;
    }
location ~ '.php$ {
            try_files $uri =404;
            fastcgi_pass unix:/var/run/php5-fpm.sock;
            fastcgi_index index.php;
            fastcgi_param SCRIPT_FILENAME     
            $document_root$fastcgi_script_name;
            include fastcgi_params;
    }
}