stackexchange-dnscontrol/documentation/functions/domain/PURGE.md

name
PURGE

PURGE is the default setting for all domains. Therefore PURGE is a no-op. It is included for completeness only.

A domain with a mixture of NO_PURGE and PURGE parameters will abide by the last one.

These three examples all are equivalent.

PURGE is the default:

D("example.com", .... ,
);

Purge is the default, but we set it anyway:

D("example.com", .... ,
  PURGE,
);

Since the "last command wins", this is the same as PURGE:

D("example.com", .... ,
  PURGE,
  NO_PURGE,
  PURGE,
  NO_PURGE,
  PURGE,
);