Since you appear to be on UNIX or Linux, you should be able to do the following: 
exec("/bin/sh", "-c", "/usr/sbin/nslookup -q=$query_type $input $names
+erver 2>&1");

[download]
Of course, if your shell is not in /bin, use the correct path.

HTH, --traveler

In reply to Re: Capturing STDERR with - by traveler
in thread Capturing STDERR with - by DrManhattan

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