Description:
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It seems, the DNS_CAA resource record is not supported by Windows builds.

Excluding DNS_CAA from DNS_ALL results in successful query.

I think, if library does not support specific RR directly, the relevant bit should be removed from DNS_ALL.


Additionally:

Attempting a raw query with RR=257 results in empty response even if relevant record exists.

F.e. google.com:

> nslookup -type=CAA google.com.
Server:         192.168.1.12
Address:        192.168.1.12#53

Non-authoritative answer:
google.com      rdata_257 = 0 issue "pki.goog"

Authoritative answers can be found from:
google.com      nameserver = ns4.google.com.
google.com      nameserver = ns3.google.com.
google.com      nameserver = ns1.google.com.
google.com      nameserver = ns2.google.com.
ns1.google.com  internet address = 216.239.32.10
ns2.google.com  internet address = 216.239.34.10
ns3.google.com  internet address = 216.239.36.10
ns4.google.com  internet address = 216.239.38.10


> php -r 'print_r(dns_get_record("google.com", 257, $x, $y, true));'
Array
(
)

Possible related: https://bugs.php.net/bug.php?id=52260

Test script:
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<?php

$rr = dns_get_record("www.php.net", DNS_ALL);// & ~DNS_CAA);
print_r($rr);


Expected result:
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A resulting array or false is returned. Silently!

Actual result:
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PHP Warning:  dns_get_record(): Type '251721779' not supported in …

Excluding DNS_CAA from DNS_ALL results in successful query.