title: PHP FastCGI Permission Issue
body: <p>I've installed nginx on a fresh Ubuntu 18.04 server. Its for an osTicket installation if that matters at all. I put all the files in the /var/www/html directory and setup my sites-available/enabled. But when I go to the site I get an Access Denied message and the error log shows:</p>
  
  <pre class="lang-none prettyprint-override"><code>2019/04/07 13:50:24 [error] 17708#17708: *1 FastCGI sent in stderr:
  "PHP message: PHP Warning:  Unknown: failed to open stream: Permission
  denied in Unknown on line 0
  Unable to open primary script: /var/www/html/upload/index.php
  (Permission denied)" while reading response header from upstream,
  client: [my IP], server: server.domain.local, request: "GET / HTTP/1.1",
  upstream: "fastcgi://unix:/run/php/php7.2-fpm.sock:", host: "server.domain.local"
  </code></pre>
  
  <p>Already made sure all directories from /var/www/html down have www-data:www-data and +x.</p>
  
  <p>/etc/nginx/sites-available/osticket.conf</p>
  
  <pre class="lang-none prettyprint-override"><code>server {
    listen 80;
          server_name server.domain.local;
  
          root   /var/www/html/upload/;
  
          access_log  /var/log/nginx/access.log;
          error_log  /var/log/nginx/error.log;
  
          index index.php;
          client_max_body_size 2000M;
          client_body_buffer_size 100M;
          client_header_buffer_size 10M;
          large_client_header_buffers 2 10M;
          client_body_timeout 12;
          client_header_timeout 12;
          keepalive_timeout 15;
          send_timeout 10;
          gzip             on;
          gzip_comp_level  2;
          gzip_min_length  1000;
          gzip_proxied     expired no-cache no-store private auth;
          gzip_types       text/plain application/x-javascript text/xml text/css application/xml;
  
          set $path_info "";
  
          location ~ /include {
            deny all;
            return 403;
         }
  
         if ($request_uri ~ "^/api(/[^\?]+)") {
           set $path_info $1;
         }
  
         location ~ ^/api/(?:tickets|tasks).*$ {
          try_files $uri $uri/ /api/http.php?$query_string;
         }
  
         if ($request_uri ~ "^/scp/.*\.php(/[^\?]+)") {
            set $path_info $1;
         }
  
         location ~ ^/scp/ajax.php/.*$ {
            try_files $uri $uri/ /scp/ajax.php?$query_string;
         }
  
         location / {
            try_files $uri $uri/ index.php;
         }
  
         location ~ \.php$ {
             fastcgi_param  SCRIPT_FILENAME  $document_root$fastcgi_script_name;
             include        fastcgi_params;
          include snippets/fastcgi-php.conf;
          fastcgi_pass unix:/run/php/php7.2-fpm.sock;
          fastcgi_param  PATH_INFO    $path_info;
        }
  }
  </code></pre>
  
  <p>User portion of /etc/php/7.2/fpm/pool.d/www.conf</p>
  
  <pre class="lang-none prettyprint-override"><code>; Unix user/group of processes
  user = www-data
  group = www-data
  </code></pre>