CODEWITHSUNDEEP
phpdns
diarmuid
diarmuid

Reputation: 25

checkdnsrr false negative

when using the checkdnsrr() function it sometimes says no record exists when it clearly does.

For example

$domain = 'ns1.huubknops.com.';
var_dump(checkdnsrr($domain, 'ANY'));

returns bool(false), indicating that no DNS record was found. However if i do:

print_r(dns_get_record($domain));

on the same domain it will return an A and AAAA record:

Array
(
[0] => Array
    (
        [host] => ns1.huubknops.com
        [type] => AAAA
        [ipv6] => 2001:888:1cf8::1
        [class] => IN
        [ttl] => 42450
    )

[1] => Array
    (
        [host] => ns1.huubknops.com
        [type] => A
        [ip] => 83.160.95.99
        [class] => IN
        [ttl] => 42450
    )

)

This does not happen for all domains, only some. Is there any reason or fix for this?

Upvotes: 1

Views: 1176

Answers (1)

preinheimer
preinheimer

Reputation: 3722

Do they implement round robin? The first comment at https://www.php.net/checkdnsrr indicates this could be a problem. The second result for IPv6 could cause similar problems

Upvotes: 1

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