nginx ajax transfer parameter is null

When I was working on a project today, I found that the parameter for the ajax request action was null. The query obtained the URL forwarded through nginx. The proxy_set_header parameter transmission must be set. The following is the nginx setting:

ajax nginx request parameter:

location /xxxxxx{
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header
The above introduces the nginx ajax transmission parameter is null, including the content. I hope it will be helpful to friends who are interested in PHP tutorials.