为什么这些网页被PHP处理？

我已经在Ubuntu 14.04服务器上创build了一个新的nginx和php5-fpm安装，并进行了如下所示的更改，以便configuration工作。 当我浏览到包含index.php的目录或尝试浏览到phpinfo.php文件时，浏览器尝试下载文件（即PHP不处理文件并返回响应）。
如果我浏览到任何其他的PHP文件，如process.php或test.php它运行良好。

configuration

更新/etc/php5/fpm/pool.d/www.conf来侦听TCP套接字

 listen = 127.0.0.1:9000 

文件：/etc/nginx/nginx.conf

 user www-data; worker_processes 4; pid /run/nginx.pid; events { worker_connections 768; # multi_accept on; } http { sendfile on; tcp_nopush on; tcp_nodelay on; keepalive_timeout 65; types_hash_max_size 2048; include /etc/nginx/mime.types; default_type application/octet-stream; access_log /var/log/nginx/access.log; error_log /var/log/nginx/error.log; gzip on; gzip_disable "msie6"; include /etc/nginx/conf.d/*.conf; include /etc/nginx/sites-enabled/*; } 

文件：/ etc / nginx / sites-available / default

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 server { listen 80 default_server; listen [::]:80 default_server ipv6only=on; root /home/user/www; index index.php index.html index.htm; autoindex on; server_name _; 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 /usr/share/nginx/html; } location ~ \.php$ { # Try a document root root /home/user/www # try_files $uri =404; #fastcgi_split_path_info ^(.+\.php)(/.+)$; # NOTE: You should have "cgi.fix_pathinfo = 0;" in php.ini # With php5-cgi alone: fastcgi_pass 127.0.0.1:9000; # With php5-fpm: #fastcgi_pass unix:/var/run/php5-fpm.sock; fastcgi_index index.php; fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name; include fastcgi_params; } } 

当错误（下载而不是进程页面发生）没有显示
当tail -f日志文件时：

• /var/log/php5-fpm.log
• /var/log/nginx/error.log
• /var/log/nginx/access.log

这个configuration有什么问题？

 include fastcgi_params; 

 location ~ \.php$ {