gethostbyname
The solution is simpel. Just add a . (point) to the end of the URL for correct name resolving.
Without this point PHP thinks it's a subdomain of your local domain and so returns the "local-IP".
gethostbynamel
(PHP 4, PHP 5)
gethostbynamel — Obtener una lista de direcciones IP correspondientes a un nombre de host de Internet dado
Descripción
array gethostbynamel
( string $nombre_host
)
Devuelve una lista de direcciones IP a las que resuelve el host de Internet especificado por nombre_host .
Lista de parámetros
- nombre_host
-
El nombre del host.
Valores retornados
Devuelve una matriz de direcciones IP o FALSE si nombre_host no puede resolverse.
Ejemplos
Example #1 Ejemplo de gethostbynamel()
<?php
$hosts = gethostbynamel('www.example.com');
print_r($hosts);
?>
El resultado del ejemplo seria:
Array ( [0] => 192.0.34.166 )
Ver también
- gethostbyname()
- gethostbyaddr()
- checkdnsrr()
- getmxrr()
- la página de manual de named(8)
add a note
User Contributed Notesgethostbynamel
info at methfessel-computers.de
29-Sep-2006 05:27
29-Sep-2006 05:27
webdev at concraption dot com
19-Sep-2005 01:25
19-Sep-2005 01:25
In PHP 5.0.4, gethostbynamel returns an empty string instead of false if the lookup fails. A simple workaround for this error is to use is_array() in an IF block:
<?
$hosts = gethostbynamel($hostname);
if (is_array($hosts)) {
echo "Host ".$hostname." resolves to:<br><br>";
foreach ($hosts as $ip) {
echo "IP: ".$ip."<br>";
}
} else {
echo "Host ".$hostname." is not tied to any IP.";
}
?>
Skyld at o2 dot co dot uk
25-Sep-2004 03:45
25-Sep-2004 03:45
Obviously, in some cases, not all IPs are likely to be useful while checking a hostname. Sometimes also, not all IPs will work. This code will check for the first WORKING IP from the list. Or at least it should - I haven't had time to test it yet.
Needs domain parameter, and port and max IPs to check are optional.
If port is not set, it will check HTTP port 80, and if max IPs to check is not set, it will only check the first 10 IPs from the list.
Hope it helps someone.
<?php
function checkhostlist($domain, $port = 80, $maxipstocheck = 10) {
$hosts = gethostbynamel($domain);
for ($chk=0;$chk<$maxipstocheck;$chk++) {
if (isset($hosts[$chk])) {
$th = fsockopen($domain, $port);
if ($th) {
fclose($th);
return $hosts[$chk];
break;
}
}
}
}
?>