How to find a domain name for an IP address?

If you have an IP address then sometimes it will be useful to try to resolve the host domain name for that IP address.

To do this is easy in PHP as there is a built in function that accepts the IP address and will find the host name for you.

In order to do this, code like the below will help:


<?php

$ip = $REMOTE_ADDR;//capture IP

$domain = GetHostByName($ip);

?>

The variable $domain will now contain the hostname.

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