Check the Cloudflare account is capable of purge a URL

[tangrufus]

1. Get host from URL

   • public Uri::getHost(void): string
   • http://uri.thephpleague.com/5.0/uri/api/

2. GET zones/:identifier

   • read "name": "example.com"
   • cache it

3. check host (1) ends with zone name(2)

[tangrufus]

As a health check https://make.wordpress.org/core/2019/04/25/site-health-check-in-5-2/