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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?

jigfox
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nonopolarity
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5 Answers5

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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');
Andre Miller
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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/ .

Alex Martelli
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  • The documentation for the Python socket library http://pydoc.org/1.6/socket.html is also very useful. Have a look at: gethostbyname() -- map a hostname to its IP number gethostbyaddr() -- map an IP number or hostname to DNS info – Andre Miller May 27 '09 at 19:49
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Socket Class in Ruby. See this answer.

Community
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rnicholson
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For PHP, you can use gethostbyname and gethostbyaddr.

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

Roshan
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$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.

Ben Vallack
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