IMO, we shouldn't do that. It can be done by 1 line of php script. As you know, DNS lookup is _expensive_ operation and kills performance a lot. If you need reverse lookup, do it by yourself.

Yasuo, the request was for the possible already reversed
name. That would not increase any but the opposite since
that is already done: Now you _have_ to do that anyway..

Not sure though if this is possible.

I understand it can be done with one statement. but I figure if apache already has this done, it would be less demanding to just have a way to grab it with a variable. I already discovered how much it kills the cpu to reverse the ip. But since on some machines it's already reversed why not take advantage of this and save yourself the second step of reversing something that has already been reversed.

Was just a thought. I understand if it's not a good idea.

Sorry again

Victor Nolton

This was easy to implement. :)
Just set 'HostnameLookups On' in httpd.conf
and you'll get an extra variable: REMOTE_HOST which
contains this information.

This just isn't documented (in predefined variables).
It's ONLY available when the above mentioned directive is set 'On'.

Thanks guys. I swear I investigated this for a long time.. I guess I missed it :(

Thanks

This has now been documented:
http://cvs.php.net/cvs.php/phpdoc/en/appendices/reserved.xml

Thanks for the report :)