PHP and gethostbyaddr

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I have a PHP script which contain the following code:

$hostname = gethostbyaddr ($ip);

Until yesterday, the gethostbyaddr returned the hostname of the given
IP-addresse. But yesterday it began to return the name of the host the
web-server is running on regardless of the given IP. If I do a 'host <IP>'
from a shell on the same machine, I get the correct hostname.

I have tried to restart the web-server (Apache 2.0) without luck.

Any hints about what's wrong? Do I need to kick the OS in the CPU (reboot)?

Jørn Dahl-Stamnes

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