/**
* Checks if the given hostname is valid.
*
* @param $hostname
* @param bool $allowIp Allow IP Addresses
* @param bool $allowWildcard Allow Wildcard names
* @param bool $allowLocal Allow local Addresses
* @param bool $looseCheck Switches checking off checks only if
* given variable is not empty
*
* @return bool
*/
public function _checkHostname($hostname, $allowIp = true, $allowWildcard = false, $allowLocal = true, $looseCheck = false)
{
if ('.' == substr($hostname, -1)) {
return false;
}
if ($looseCheck === true) {
return 0 == strlen(trim($hostname)) ? false : true;
}
$n = new Hostname();
$n->setAllow(Hostname::ALLOW_DNS);
if ($allowIp) {
$n->setAllow(Hostname::ALLOW_IP | Hostname::ALLOW_DNS);
}
if ($allowWildcard) {
$hostname = str_replace('*.', 'bogus', $hostname);
}
if (!filter_var($hostname, FILTER_VALIDATE_IP)) {
$exp = explode('.', $hostname);
if (1 == count($exp)) {
if (!$allowLocal) {
return false;
}
$hostname = $hostname . '.syseleven.de';
}
}
if (!$n->isValid($hostname)) {
return false;
}
return true;
}