Which is more reliable gethostbyaddr($_SERVER['REMOTE_ADDR']) or $_SERVER['REMOTE_HOST']
<p>I have to get the remote url hostname from the <code>server</code> <code>script</code>, which one of the following is more reliable:</p>

<p><code>gethostbyaddr($_SERVER['REMOTE_ADDR'])</code> or <code>$_SERVER['REMOTE_HOST']</code></p>
