如何为多站点WordPress nginx服务器编写帖子位置规则？

Question

I have multisite sub-directory wordpress setup in nginx server. My posts are redirect to 404 not found page.

So that I decide to write some config code in config file of nginx

My Post urls are something like below

http://abc/site1/index.php/post-slug/

http://abc/site2/index.php/post-slug-1/

They all goes to 404 so I write some code in config file of nginx like below

location /site1/index.php {
    rewrite ^/site1/index.php/(.*) /index.php?****** permanent;
}

Here I also want to remove 'site1' because this is dynamic (multisite setup).

Or do I need to add code of map in config file?

Please help me to solve this issue.