示列

  ## 根站点项目
  location / {
    try_files $uri $uri/ /index.php?$query_string;
  }
  ## 二级项目
  location /public/ {
        index   index.php   index.html;
        if (!-e $request_filename){
             rewrite ^/public/(.*)$ /public/index.php/$1 last;
        }
  }

完整

server {
  listen 80;
  listen 443 ssl http2;
  ssl_certificate /usr/local/nginx/conf/ssl/xxx.com.crt;
  ssl_certificate_key /usr/local/nginx/conf/ssl/xxx.com.key;
  ssl_protocols TLSv1 TLSv1.1 TLSv1.2 TLSv1.3;
  ssl_ciphers TLS13-AES-256-GCM-SHA384:TLS13-CHACHA20-POLY1305-SHA256:TLS13-AES-128-GCM-SHA256:TLS13-AES-128-CCM-8-SHA256:TLS13-AES-128-CCM-SHA256:EECDH+CHACHA20:EECDH+AES128:RSA+AES128:EECDH+AES256:RSA+AES256:EECDH+3DES:RSA+3DES:!MD5;
  ssl_prefer_server_ciphers on;
  ssl_session_timeout 10m;
  ssl_session_cache builtin:1000 shared:SSL:10m;
  ssl_buffer_size 1400;
  add_header Strict-Transport-Security max-age=15768000;
  ssl_stapling on;
  ssl_stapling_verify on;
  server_name xxx.com www.xxx.com;
  access_log off;
  index index.html index.htm index.php;
  root /data/wwwroot/xxx.com;
  ## 根站点项目
  location / {
    try_files $uri $uri/ /index.php?$query_string;
  }
  ## 二级项目
  location /public/ {
        index   index.php   index.html;
        if (!-e $request_filename){
             rewrite ^/public/(.*)$ /public/index.php/$1 last;
        }
  }
  #error_page 404 /404.html;
  #error_page 502 /502.html;
  
  location ~ [^/]\.php(/|$) {
    #fastcgi_pass remote_php_ip:9000;
    fastcgi_pass unix:/dev/shm/php-cgi.sock;
    fastcgi_index index.php;
    include fastcgi.conf;
  }

  location ~ .*\.(gif|jpg|jpeg|png|bmp|swf|flv|mp4|ico)$ {
    expires 30d;
    access_log off;
  }
  location ~ .*\.(js|css)?$ {
    expires 7d;
    access_log off;
  }
  location ~ /\.ht {
    deny all;
  }
}