如何以编程方式编写nslookup？

Question

除了在脚本中使用exec进行nslookup之外，还有没有一种简便的方法可以用PHP，Python或Ruby编程地编写它？

Answer 1

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 2

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 3

Socket Class in Ruby. See this answer .

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.