I have been installed php-fpm and tengine centos 6.
Here is my /usr/local/nginx/conf/nginx.conf
server {
    listen       80;
    server_name  localhost;
    location / {
        root   html;
        index  index.html index.htm;
    error_page  404              /404.html;
    error_page   500 502 503 504  /50x.html;
    location = /50x.html {
        root   html;
    }
    location ~ \.php$ {
        proxy_pass   http://127.0.0.1;
    }
    location ~ \.php$ {
        root           html;
        fastcgi_pass   127.0.0.1:9000;
        fastcgi_index  index.php;
    #   fastcgi_param  SCRIPT_FILENAME/$document_root$fastcgi_script_name;
        include        fastcgi_params;
    }
    # deny access to .htaccess files, if Apache's document root
    # concurs with nginx's one
    #
    location ~ /\.ht {
        deny  all;
    }
}
http://172.104.126.251/index.html Work!
But
http://172.104.126.251/index.php can't work, it appear error page.
Hope you guys can help me, thanks!