#17713 [Ana->Csd]: Request Reverse Lookup Reserved Variable

ID: 17713 Updated by: philip@php.net Reported By: vnolton@pragakhan.com -Status: Analyzed +Status: Closed Bug Type: Documentation problem Operating System: Solaris,freebsd PHP Version: 4.2.1 New Comment: This has now been documented: http://cvs.php.net/cvs.php/phpdoc/en/appendices/reserved.xml Thanks for the report :) Previous Comments: ------------------------------------------------------------------------ [2002-06-15 23:23:58] vnolton@pragakhan.com Thanks guys. I swear I investigated this for a long time.. I guess I missed it :( Thanks ------------------------------------------------------------------------ [2002-06-15 22:37:23] sniper@php.net 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'. ------------------------------------------------------------------------ [2002-06-11 20:26:22] vnolton@pragakhan.com 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 ------------------------------------------------------------------------ [2002-06-11 19:50:52] sniper@php.net 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. ------------------------------------------------------------------------ [2002-06-11 19:44:38] yohgaki@php.net 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. ------------------------------------------------------------------------ The remainder of the comments for this report are too long. To view the rest of the comments, please view the bug report online at http://bugs.php.net/17713 -- Edit this bug report at http://bugs.php.net/?id=17713&edit=1