resolving gethostbyaddr

[tomasd]

Hi,

 

Since I've moved my web server from WAMP to LAMP enviroment following script instead of hostname only gives the IP address

 

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

echo $hostname;
?>

(resolv.conf has exact same dns servers as WAMP server had)

 

Can somebody explain how to make php resolve IP's to hostnames?