Ip überprüfung

[FLash]

hab im netz ein kleines codeschnipsel gefunden das die ip adresse ein bisschen überprüft... hab das in mein stg_ip-check eingebaut.. praktisch ist auf jeden fall erstmal das ich die dns angezeigt bekomme..

da es in anderen foren auch öffentlich zugänglich ist will ich es euch nicht vorenthalten.. ist bestimmt nützlich

ihr müsst nur wissen was ihr damit anfängt

* Gets the "true" IP address of the current user 
* 
* @return string the ip of the user 
*/ 
function GetTrueIP() 
{ 
global $REMOTE_ADDR, $HTTP_CLIENT_IP; 
global $HTTP_X_FORWARDED_FOR, $HTTP_X_FORWARDED, $HTTP_FORWARDED_FOR, $HTTP_FORWARDED; 
global $HTTP_VIA, $HTTP_X_COMING_FROM, $HTTP_COMING_FROM; 

// Get some server/environment variables values 
if (empty($REMOTE_ADDR)) { 
if (!empty($_SERVER) && isset($_SERVER['REMOTE_ADDR'])) { 
$REMOTE_ADDR = $_SERVER['REMOTE_ADDR']; 
} 
else if (!empty($_ENV) && isset($_ENV['REMOTE_ADDR'])) { 
$REMOTE_ADDR = $_ENV['REMOTE_ADDR']; 
} 
else if (@getenv('REMOTE_ADDR')) { 
$REMOTE_ADDR = getenv('REMOTE_ADDR'); 
} 
} // end if 

if (empty($HTTP_CLIENT_IP)) { 
if (!empty($_SERVER) && isset($_SERVER['HTTP_CLIENT_IP'])) { 
$HTTP_CLIENT_IP = $_SERVER['HTTP_CLIENT_IP']; 
} 
else if (!empty($_ENV) && isset($_ENV['HTTP_CLIENT_IP'])) { 
$HTTP_CLIENT_IP = $_ENV['HTTP_CLIENT_IP']; 
} 
else if (@getenv('HTTP_CLIENT_IP')) { 
$HTTP_CLIENT_IP = getenv('HTTP_CLIENT_IP'); 
} 
} // end if 

if (empty($HTTP_X_FORWARDED_FOR)) { 
if (!empty($_SERVER) && isset($_SERVER['HTTP_X_FORWARDED_FOR'])) { 
$HTTP_X_FORWARDED_FOR = $_SERVER['HTTP_X_FORWARDED_FOR']; 
} 
else if (!empty($_ENV) && isset($_ENV['HTTP_X_FORWARDED_FOR'])) { 
$HTTP_X_FORWARDED_FOR = $_ENV['HTTP_X_FORWARDED_FOR']; 
} 
else if (@getenv('HTTP_X_FORWARDED_FOR')) { 
$HTTP_X_FORWARDED_FOR = getenv('HTTP_X_FORWARDED_FOR'); 
} 
} // end if 

if (empty($HTTP_X_FORWARDED)) { 
if (!empty($_SERVER) && isset($_SERVER['HTTP_X_FORWARDED'])) { 
$HTTP_X_FORWARDED = $_SERVER['HTTP_X_FORWARDED']; 
} 
else if (!empty($_ENV) && isset($_ENV['HTTP_X_FORWARDED'])) { 
$HTTP_X_FORWARDED = $_ENV['HTTP_X_FORWARDED']; 
} 
else if (@getenv('HTTP_X_FORWARDED')) { 
$HTTP_X_FORWARDED = getenv('HTTP_X_FORWARDED'); 
} 
} // end if 

if (empty($HTTP_FORWARDED_FOR)) { 
if (!empty($_SERVER) && isset($_SERVER['HTTP_FORWARDED_FOR'])) { 
$HTTP_FORWARDED_FOR = $_SERVER['HTTP_FORWARDED_FOR']; 
} 
else if (!empty($_ENV) && isset($_ENV['HTTP_FORWARDED_FOR'])) { 
$HTTP_FORWARDED_FOR = $_ENV['HTTP_FORWARDED_FOR']; 
} 
else if (@getenv('HTTP_FORWARDED_FOR')) { 
$HTTP_FORWARDED_FOR = getenv('HTTP_FORWARDED_FOR'); 
} 
} // end if 

if (empty($HTTP_FORWARDED)) { 
if (!empty($_SERVER) && isset($_SERVER['HTTP_FORWARDED'])) { 
$HTTP_FORWARDED = $_SERVER['HTTP_FORWARDED']; 
} 
else if (!empty($_ENV) && isset($_ENV['HTTP_FORWARDED'])) { 
$HTTP_FORWARDED = $_ENV['HTTP_FORWARDED']; 
} 
else if (@getenv('HTTP_FORWARDED')) { 
$HTTP_FORWARDED = getenv('HTTP_FORWARDED'); 
} 
} // end if 

if (empty($HTTP_VIA)) { 
if (!empty($_SERVER) && isset($_SERVER['HTTP_VIA'])) { 
$HTTP_VIA = $_SERVER['HTTP_VIA']; 
} 
else if (!empty($_ENV) && isset($_ENV['HTTP_VIA'])) { 
$HTTP_VIA = $_ENV['HTTP_VIA']; 
} 
else if (@getenv('HTTP_VIA')) { 
$HTTP_VIA = getenv('HTTP_VIA'); 
} 
} // end if 
if (empty($HTTP_X_COMING_FROM)) { 
if (!empty($_SERVER) && isset($_SERVER['HTTP_X_COMING_FROM'])) { 
$HTTP_X_COMING_FROM = $_SERVER['HTTP_X_COMING_FROM']; 
} 
else if (!empty($_ENV) && isset($_ENV['HTTP_X_COMING_FROM'])) { 
$HTTP_X_COMING_FROM = $_ENV['HTTP_X_COMING_FROM']; 
} 
else if (@getenv('HTTP_X_COMING_FROM')) { 
$HTTP_X_COMING_FROM = getenv('HTTP_X_COMING_FROM'); 
} 
} // end if 
if (empty($HTTP_COMING_FROM)) { 
if (!empty($_SERVER) && isset($_SERVER['HTTP_COMING_FROM'])) { 
$HTTP_COMING_FROM = $_SERVER['HTTP_COMING_FROM']; 
} 
else if (!empty($_ENV) && isset($_ENV['HTTP_COMING_FROM'])) { 
$HTTP_COMING_FROM = $_ENV['HTTP_COMING_FROM']; 
} 
else if (@getenv('HTTP_COMING_FROM')) { 
$HTTP_COMING_FROM = getenv('HTTP_COMING_FROM'); 
} 
} // end if 

// Gets the default ip sent by the user 
if (!empty($REMOTE_ADDR)) { 
$direct_ip = $REMOTE_ADDR; 
} 

// Gets the proxy ip sent by the user 
$proxy_ip = ''; 
if (!empty($HTTP_X_FORWARDED_FOR)) { 
$proxy_ip = $HTTP_X_FORWARDED_FOR; 
} else if (!empty($HTTP_X_FORWARDED)) { 
$proxy_ip = $HTTP_X_FORWARDED; 
} else if (!empty($HTTP_FORWARDED_FOR)) { 
$proxy_ip = $HTTP_FORWARDED_FOR; 
} else if (!empty($HTTP_FORWARDED)) { 
$proxy_ip = $HTTP_FORWARDED; 
} else if (!empty($HTTP_VIA)) { 
$proxy_ip = $HTTP_VIA; 
} else if (!empty($HTTP_X_COMING_FROM)) { 
$proxy_ip = $HTTP_X_COMING_FROM; 
} else if (!empty($HTTP_COMING_FROM)) { 
$proxy_ip = $HTTP_COMING_FROM; 
} // end if... else if... 

// Returns the true IP if it has been found, else ... 
if (empty($proxy_ip)) { 
// True IP without proxy 
return $direct_ip; 
} else { 
$is_ip = ereg('^([0-9]{1,3}.){3,3}[0-9]{1,3}', $proxy_ip, $regs); 

if ($is_ip && (count($regs) > 0)) { 
// True IP behind a proxy 
return $regs[0]; 
} else { 

if (empty($HTTP_CLIENT_IP)) { 
// Can't define IP: there is a proxy but we don't have 
// information about the true IP 
return "(unbekannt) " . $proxy_ip; 
} else { 
// better than nothing 
return $HTTP_CLIENT_IP; 
} 
} 
} // end if... else... 
} // end of function 

$ip = substr(getenv("REMOTE_ADDR"), 0, 14); 
$true_ip = GetTrueIP(); 
$dns = @gethostbyaddr($ip); 
$true_dns = @gethostbyaddr($true_ip);