nested WordPress instances with Caddy

Caddyfile

[hostname] {
  encode gzip
  log {
    output file /var/log/caddylog
  }
  @canonicalPath {
    file {
      try_files {path}/index.php
    }
    not path */
  }
  @altsite1 {
    file {
      try_files {path} {path}/index.php /altsite1{path} /altsite1/index.php
      split_path .php
    }
    path /altsite1/*
  }
  @altsite2 {
    file {
      try_files {path} {path}/index.php /altsite2{path} /altsite2/index.php
      split_path .php
    }
    path /altsite2/*
  }
  @rootsite {
    file {
      try_files {path} {path}/index.php index.php
      split_path .php
    }
    not path /altsite1/*
    not path /altsite2/*
  }
  @phpFiles {
    path *.php
  }
  route {
    redir @canonicalPath {path}/ 308
    rewrite @altsite1 {http.matchers.file.relative}
    rewrite @altsite2 {http.matchers.file.relative}
    rewrite @rootsite {http.matchers.file.relative}
    reverse_proxy @phpFiles unix//var/run/php/php-fpm.sock {
      transport fastcgi {
        split .php
      }
    }
  }
  root * /srv/wordpress/
  file_server
}

You'll have to explain this to me.

Caddyfile supports comments, does't it?

https://caddy.community/t/nested-wordpress-instances-v2/8301