<FilesMatch "(webp-on-demand\.php|webp-realizer\.php|ping\.php|ping\.txt)$">
  <IfModule !mod_authz_core.c>
    Order deny,allow
    Allow from all
  </IfModule>
  <IfModule mod_authz_core.c>
    Require all granted
  </IfModule>
</FilesMatch>