PHP文件访问时提示http 404错误

刚安装好Nginx+php服务后，测试phpinfo页是否显示正确，却提示http 404错误

nginx的错误提示如下：

2019/08/14 11:25:27 [error] 119533#0: *6 FastCGI sent in stderr: "Primary script unknown" while reading response header from upstream, client: 192.168.0.62, server: , request: "GET......

phpinfo.php文件

<?php
phpinfo();

原因：

nginx和php的root根目录未设置对，如果代码都在同一目录下，可在server{}下设置全局root，不用单独在location{}里设置root
root /main/web/www
#另外/scripts 修改为 $document_root
location ~ .php$ {
 fastcgi_pass 127.0.0.1:9000;
 fastcgi_index index.php;
 fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
 include fastcgi_params;
 }