Resolvendo IP para Hostname em PHP

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Esconder código-fonte

<?


#########################################
##  Resolve IP to Hostname             ##
##  Code by @Kouback_TR_               ##
##  http://koubacktr.com/              ##
##  http://twitter.com/kouback_tr_     ##
#########################################


print"
<title>Resolve IP to Hostname</title>
<br>
<center>Resolve IP to Hostname</a></center></font>
<form method='post' action='?act=resolve'>
<br>
<center>IP: <input type=text name=ip></input></center></pre>
<center><input type=submit value='Resolve'></input></center>
</form>";

if($_GET['act'] == "resolve"){

$iptoresolve = $_POST['ip'];
$hostname = gethostbyaddr($iptoresolve);

print"<br><br><br><center>";
print"<b>IP: $iptoresolve </b><br>";
print"<b>HOSTNAME: $hostname </b><br>";
print"</center>";

}
?>