环境：阿里云ubuntu 14.04 nginx 1.8.0 php 5.5.9， 有虚拟主机，已经安装多个应用

安装weiphp的时候，查了很多，得知nginx不支持phpinfo,rewrite,,,也不太懂。然后安装的时候可以打开安装页面，但是点击同意协议的时候，跳转路径不正常：
http://xx.cn.php/?s=/install/step1.html(但是如果手动改成http://xx.cn/install.php?s=/install/step1.html的话就可以看到检测环境页面，只不过下一步也失败)
情况就是这样，求教...大概设置了一下本应用的配置文件如下：

server {

    listen       80;
    server_name xx.cn  www.xx.cn;
    root /var/www/xx/html/;
    index  index.php index.html index.htm;
    access_log /var/www/xx/logs/access.log;
    error_log /var/www/xx/logs/error.log;

    location / {
         try_files $uri $uri/ /index.php;
    }
    location ~ \.php$ {
        include fastcgi_params;
        set $real_script_name $fastcgi_script_name;

        if ($fastcgi_script_name ~ "^(.+?\.php)(/.+)$") {
            set $real_script_name $1;
            set $path_info $2;
            }
        fastcgi_param  SCRIPT_FILENAME /var/www/xx/html$fastcgi_script_name;
        fastcgi_param SCRIPT_NAME $real_script_name;
        fastcgi_param PATH_INFO $path_info;
        fastcgi_split_path_info ^(.+\.php)(/.+)$;
        fastcgi_pass unix:/var/run/php5-fpm.sock;
        fastcgi_index index.php;
        fastcgi_buffer_size 128k;
        fastcgi_buffers 256 16k;
        fastcgi_busy_buffers_size 256k;
        fastcgi_temp_file_write_size 256k;
        fastcgi_read_timeout 240;

    }

}