在nginx中为Symfony2创建一个块

server {
   listen 80; 
   server_name myapp.local
   root /home/jack/Documents/projects/php/myapp/web;
   location / { 
       #try_files $uri $uri/ /app_dev.php?$query_string;
       #try_files $uri /app_dev.php$is_args$args;
       try_files $uri @rewriteapp;
   }   
    location @rewriteapp {
        rewrite ^(.*)$ /app_dev.php/$1 last;
    }   
    location ~ ^/(app|app_dev|config)'.php(/|$) {
        fastcgi_pass unix:/var/run/php5-fpm.sock;
        fastcgi_split_path_info ^(.+'.php)(/.*)$;
        include fastcgi_params;
        fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
        fastcgi_param HTTPS off;
    }   
   access_log /var/log/nginx/myapp-access.log;
   error_log /var/log/nginx/myapp-error.log;
}

我一直在努力完成这项工作，但我做不到，当我去myapp.local时，我得到了No input file specified..在日志中，我有：

[error] 6867#0: *1 FastCGI sent in stderr: "Unable to open primary script: /usr/share/nginx/html/app.php (No such file or directory)" while reading response header from upstream, client: 127.0.0.1, server: myapp.local, request: "GET /app.php HTTP/1.1", upstream: "fastcgi://unix:/var/run/php5-fpm.sock:", host: "myapp.local"

更新

看起来它正在尝试访问/usr/share/nginx/html/app.php，为什么它这样做？ nginx -v : 1.4.6