PHP reading hostname differently

[Eiolon]

PHP probably has nothing to do with this, but I just want to make sure.

 

I get the hostname of computers in our LAN on many occassions.  However, sometimes it is read and displayed differently.  I have not been able to determine what causes it.

 

Using code:

 

 

$hostname = gethostbyaddr($_SERVER['REMOTE_ADDR']);

 

I will get the hostname displayed as either: JOHNSPC or JOHNSPC.domain.tld  It will randomly decide which one to display.

 

I just wanted to make sure there is nothing I can do in PHP configuration to make sure it is consistantly read as one or the other.  I know I can make it read only up to the period, which I may end up having to do.

[trq]

I'm not exactly sure how the internals of gethostbyaddr() work but I would assume it's a simple DNS lookup of some sort.

 

Maybe your server is switching between different DNS servers to do it's lookups? These servers may indeed have different hostnames registered.