How to fix nginx error: unknown directive "fastcgi_cache_purge"?

Question

Nginx

Hello!
I am moving my VPS from one host to another. I rarely encounter server settings. Configured, works - forgot. The server is used as a host for WordPress sites. Server config: nginx + php-fpm + mysql. Also used is fastcgi_cache. But the new server installed the entire set of software, transferred the configs from the old one, launched and nginx does not start, nginx swears: [emerg] unknown directive "fastcgi_cache_purge" in /etc/nginx/sites-enabled/site.ru:78.
The old server has nginx 1.4.1, but the new one has 1.10.1. I don’t know if this is important, but I installed PHP7 on the new server, they write that there is a performance increase, I updated the nginx configs for PHP7.
In the nginx documentationthe fastcgi_cache_purge directive has a postscript "functionality is available as part of a commercial subscription." Is it all about this? Those. now without buying an NGINX subscription I can't do anything?
Configs:
nginx.conf

user  www-data;
worker_processes  1;

error_log  /var/log/nginx/error.log warn;
pid        /var/run/nginx.pid;


events {
    worker_connections  768;
}


http {
    include       /etc/nginx/mime.types;
    default_type  application/octet-stream;

    log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
                      '$status $body_bytes_sent "$http_referer" '
                      '"$http_user_agent" "$http_x_forwarded_for"';

    access_log  /var/log/nginx/access.log  main;

    sendfile        on;
    tcp_nopush     on;

    client_max_body_size 20M;
   
    tcp_nodelay on;
    keepalive_timeout  65;
    types_hash_max_size 2048;
    server_tokens off;

    #Limit Request
    limit_req_zone $binary_remote_addr zone=one:10m rate=1r/s;
    limit_req_status 444;    

    server_names_hash_bucket_size 64;

    #Gzip settings
    gzip on;
    gzip_disable "msie6";
    gzip_types text/css text/x-component application/x-javascript application/javascript text/javascript text/x-js text/richtext image/svg+xml text/plain text/xsd text/xsl text/xml image/x-icon;
    #gzip_vary on;
    gzip_proxied any;
    gzip_min_length 1100;
    gzip_comp_level 3;
    gzip_buffers 16 8k;
    gzip_http_version 1.0;
    #gzip_types text/plain text/css application/json application/x-javascript text/xml application/xml application/xml+rss text/javascript;

    #Wordpress Cache
    fastcgi_cache_path /home/server/nginx-cache levels=1:2 keys_zone=WORDPRESS:10m inactive=30m; 
    fastcgi_cache_key "$scheme$request_method$host$request_uri";
    fastcgi_cache_use_stale error timeout invalid_header http_500;	


#    include /etc/nginx/conf.d/*.conf;
    include /etc/nginx/sites-enabled/*;
}

virtual host conf:

server {
  listen   80; 
  server_name example.com  www.example.com;
  
  root /home/server/htdocs/example.com/www;
   	
  access_log /home/server/logs/example.com/nginx.access.log;
  error_log /home/server/logs/example.com/nginx.error.log;
  index index.php index.html index.htm;

  location ~ \wp-login.php {
    auth_basic "Unauthorized";
    auth_basic_user_file /home/server/.htpasswd;
    #deny all;
    #allow 109.184.54.20;
                fastcgi_pass unix:/run/php/php7.0-fpm.sock;
                include fastcgi_params;
        }

  #Enable Browser Cache
  location ~* \.(jpg|jpeg|gif|png|ico|css|pdf|ppt|txt|bmp|rtf|js)$ {
       		access_log off; 
    expires 30d;
    #add_header Pragma public;
  		#add_header Cache-Control "public, must-revalidate, proxy-revalidate";
  }	
    
  #Block HotLink
  location ~ \.(jpeg|png|gif|jpg)$ {
    valid_referers none blocked example.com *.example.com;
    if ($invalid_referer) {
    return 403;
    }
  }	
  
  error_page 404 /404.html;
  error_page 500 502 503 504 /50x.html;
  location = /50x.html {
    root /etc/nginx/error;
  }
  
  
  #Nginx Helper

  set $skip_cache 0;

  # POST requests and urls with a query string should always go to PHP
  if ($request_method = POST) {
    set $skip_cache 1;
  }   
  if ($query_string != "") {
    set $skip_cache 1;
  }   

  # Don't cache uris containing the following segments
  if ($request_uri ~* "(/wp-admin/|/xmlrpc.php|/wp-(app|cron|login|register|mail).php|wp-.*.php|/feed/|index.php|wp-comments-popup.php|wp-links-opml.php|wp-locations.php|sitemap(_index)?.xml|[a-z0-9_-]+-sitemap([0-9]+)?.xml)") {
    set $skip_cache 1;
  }   

  # Don't use the cache for logged in users or recent commenters
  if ($http_cookie ~* "comment_author|wordpress_[a-f0-9]+|wp-postpass|wordpress_no_cache|wordpress_logged_in") {
    set $skip_cache 1;
  }
  
  location ~ .php$ {
    try_files $uri =404; 
    include fastcgi_params;
    fastcgi_pass unix://run/php/php7.0-fpm.sock;
    fastcgi_cache_bypass $skip_cache;
          fastcgi_no_cache $skip_cache;
    fastcgi_index index.php;
    fastcgi_cache WORDPRESS;
    fastcgi_ignore_headers Cache-Control Expires Set-Cookie;
    fastcgi_cache_valid 200 301 202 404 60m;
  }
  
  location ~ /purge(/.*) {
      fastcgi_cache_purge WORDPRESS "$scheme$request_method$host$1";
  }	
  
  #WORDPRESS conf
  location / {
  try_files $uri $uri/ /index.php?$args;
  }
  location = /favicon.ico {
    log_not_found off;
    access_log off;
  }
  location = /robots.txt {
    allow all;
    log_not_found off;
    access_log off;
  }
  location ~ /\. {
    deny all;
  }
  location ~* /(?:uploads|files)/.*\.php$ {
    deny all;
  }
  
  rewrite /wp-admin$ $scheme://$host$uri/ permanent;

}

Answer 1

Yes. Exactly. This functionality is only available in the paid version. As if the nginx developers also want to earn.
Older versions could be built with a free module https://github.com/FRiCKLE/ngx_cache_purge
It gave such functionality.

Answer 2

While I see one thing, you specified the WORDPRES zone, and you are requesting WORDPRESS

Answer 3

If there is no money for a paid version of nginx, then you can do something like this:
if ($http_purgecache = 1){
set $skip_cache 1;
set $skip_cache_save 0;
}
#In the php processing section
#cache
fastcgi_cache_bypass $skip_cache;
fastcgi_no_cache $skip_cache_save;
fastcgi_cache WORDPRESS;
fastcgi_cache_valid 1m;
location ~ /purgecache(/.*) {
proxy_set_header purgecache 1;
proxy_set_header Host $host;
proxy_pass $scheme://IP:PORT$1;
# fastcgi_cache_purge WORDPRESS "$scheme$request_method$host$1";
}