HEADER DATA:
array(4) {
  ["Host"]=>
  string(18) "mail.testuj.org.pl"
  ["Accept"]=>
  string(3) "*/*"
  ["User-Agent"]=>
  string(89) "meta-externalagent/1.1 (+https://developers.facebook.com/docs/sharing/webmasters/crawler)"
  ["X-HTTPS"]=>
  string(1) "1"
}