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From: Arno Welzel <usenet@arnowelzel.de>
Newsgroups: comp.lang.php
Subject: Re: [ Get Hostname ]
Date: Mon, 18 May 2015 09:56:57 +0200
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Am 2015-05-12 um 02:10 schrieb alissonlinneker@gmail.com:

> How do I get file_get_contents return the client domain that is referring to the url?
> 
> $ _SERVER ["REMOTE_ADDR"] is returning the shared hosting DNS reverse and not site.com
> 
> Example:
> 
> Server have url: http://server.com/test.html
> 
> And client (client.com) get contents:
> 
> file_get_contents('http://server.com/test.html')
> 
> On server.com i need echo the client host (client.com)
> 
> How to?

You can use phpinfo() to check what environment variables are set by the
server.

Likely you can use $_SERVER['REMOTE_ADDR'] and nslookup() to get the
host name:

<?php
if(isset($_SERVER['REMOTE_ADDR']))
{
  $hostname = nslookup($_SERVER['REMOTE_ADDR']);
}
else
{
  $hostname = '(unknown)';
}
?>

BTW: On <http://arnowelzel.de/wp/en/tools/http-request-headers> this
method is also used to get the host name for the IP address of the
visitor (along with some other checks for proxies).

-- 
Arno Welzel
http://arnowelzel.de
http://de-rec-fahrrad.de
http://fahrradzukunft.de