checkdnsrr always returns false

[daq]

I searched the forum and found nothing.

 

echo checkdnsrr($ip) ? 'True' : 'False';

 

returns false no matter what $ip is. The function does work correctly when I feed it the name, but ip address consistently fails.

Anyone dealt with this before?

 

Any suggestions other than using exec(host) || exec(nslookup) welcome. :-)

Thank you.

[phpSensei]

Try

 

<?php
$ip = $_SERVER['REMOTE_ADDR'];
$dns = (checkdnsrr($ip)) ? 'True' : 'False';

echo $dns;
?>

[daq]

Its actually a console app. I feed the ip manually (or it is read from a file,) but I know for sure ip is correctly formatted.

[phpSensei]

Try echoing the IP, see if it comes out right.

[daq]

<?php
$ip = $argv[1];
echo $ip;
echo "\n";
echo checkdnsrr($ip) ? 'True' : 'False';
#echo echo checkdnsrr($ip, 'ANY') ? 'True' : 'False';
echo "\n";
echo gethostbyaddr($ip);
echo "\n"
?>

 

"php ip.php 64.233.167.99" returns:

64.233.167.99
False
py-in-f99.google.com

 

Command that searches for ANY dns record returns false as well.