研究了两天终于弄好了，代码放到/edu/web/目录下
主要是找到了调试方法，error_log logs/error.log debug;
增加上debug，可以看到详细的调试情况

=`########edu eduweb
location /edu/web {

            alias html/edu/web;
    index app.php;

    try_files $uri @rewriteapp; 

}

location @rewriteapp {
   rewrite ^/edu/web/(.*)$ /edu/web/app.php/$1 last;

}

location ~ ^/udisk {

    internal;

    root html/edu/app/data/;

}

location ~ ^/edu/web/(app|app_dev)\.php(/|$) {

    fastcgi_pass   php_processes;
            fastcgi_split_path_info ^(.+\.php)(/.*)$;
    include fastcgi_params;
    fastcgi_param  SCRIPT_FILENAME    $document_root$fastcgi_script_name;
    fastcgi_param  HTTPS off;
    fastcgi_param HTTP_X-Sendfile-Type X-Accel-Redirect;

    fastcgi_param HTTP_X-Accel-Mapping /udisk=html/edu/app/data/udisk;

    fastcgi_buffer_size 128k;

    fastcgi_buffers 8 128k;

}

                location ~* \.(jpg|jpeg|gif|png|ico|swf)$ {
                
                expires 3y;
                
                access_log off;
                
                gzip off;
                
                }
                
                location ~* \.(css|js)$ {
                
                access_log off;
                
                expires 3y;
                
                }
                
                location ~ ^/edu/files/.*\.(php|php5)$ {
                
                deny all;
                
                }
                ########edu`