how to write nslookup programmatically?

Question

instead of using exec in our script to do an nslookup, is there an easy way to write it programmatically in PHP, Python, or Ruby?

Answer 1

Socket Class in Ruby. See this answer.

Answer 2

Yes, although the function names might not be what you expect.

Since the Python and Ruby answers are already posted, here is an PHP example:

$ip = gethostbyname('www.example.com');
$hostname = gethostbyaddr('127.0.0.1');

Answer 3

For Python see http://small-code.blogspot.com/2008/05/nslookup-in-python.html . For much richer functionality, also in Python, see http://www.dnspython.org/ .

Answer 4

For PHP, you can use gethostbyname and gethostbyaddr.

For Python, import the socket module and again use gethostbyname and gethostbyaddr.

Answer 5

$ip = gethostbyname('www.example.com');

This will work but please be aware that it will be affected if the user changes their hosts file. You can't rely on it.