(PECL getdns >= 0.10.0)
php_getdns_root_trust_anchor — Retrieve the default list of trust anchor records.
This function retrieves the default list of trust anchor records that is used by the getdns library to validate DNSSEC.
An integer that will be set to the number of seconds since epoch that the trust anchors were obtained. Note that this argument is passed by reference and any existing value will be overwritten.
This function returns an integer representing the trust anchor list. Zero (0) is returned if no default trust anchor is present.