Host zoeken via ip

<?PHP
$ip = $_SERVER['REMOTE_ADDR'];
$host = gethostbyaddr($ip);
?>

<?PHP
$ip = $_SERVER['REMOTE_ADDR'];
$host = gethostbyaddr($ip);
?>

<?
function get_provider($ip=false) {
    $your_ip = (getenv("HTTP_X_FORWARDED_FOR")) ? $_SERVER['HTTP_X_FORWARDED_FOR'] : (getenv("HTTP_CLIENT_IP")) ? $_SERVER['HTTP_CLIENT_IP'] : $_SERVER['REMOTE_ADDR']; // ip adres ophalen
    $ip = ($ip == false) ? $your_ip : $ip; // zetten in $ip
    if (ereg ("^([1-9]{1}|[1-9]{1}[0-9]{1}|1[0-9]{2}|2[0-4]{1}[0-9]{1}|25[0-5]{1})\.([1-9]{1}|[1-9]{1}[0-9]{1}|1[0-9]{2}|2[0-4]{1}[0-9]{1}|25[0-5]{1})\.([1-9]{1}|[1-9]{1}[0-9]{1}|1[0-9]{2}|2[0-4]{1}[0-9]{1}|25[0-5]{1})\.([1-9]{1}|[1-9]{1}[0-9]{1}|1[0-9]{2}|2[0-4]{1}[0-9]{1}|25[0-5]{1})\$", $ip)) {
// als ip valid is (deze controle niet helemaal zelf gemaakt ^^
         $string = gethostbyaddr($ip);
         $provider = explode(".", $string);
          return $provider[2];
    }else
        return false;
}
?>

<?
function get_provider($ip=false) {
    $your_ip = (getenv("HTTP_X_FORWARDED_FOR")) ? $_SERVER['HTTP_X_FORWARDED_FOR'] : (getenv("HTTP_CLIENT_IP")) ? $_SERVER['HTTP_CLIENT_IP'] : $_SERVER['REMOTE_ADDR']; // ip adres ophalen
    $ip = ($ip == false) ? $your_ip : $ip; // zetten in $ip
    if (ereg ("^([1-9]{1}|[1-9]{1}[0-9]{1}|1[0-9]{2}|2[0-4]{1}[0-9]{1}|25[0-5]{1})\.([1-9]{1}|[1-9]{1}[0-9]{1}|1[0-9]{2}|2[0-4]{1}[0-9]{1}|25[0-5]{1})\.([1-9]{1}|[1-9]{1}[0-9]{1}|1[0-9]{2}|2[0-4]{1}[0-9]{1}|25[0-5]{1})\.([1-9]{1}|[1-9]{1}[0-9]{1}|1[0-9]{2}|2[0-4]{1}[0-9]{1}|25[0-5]{1})\$", $ip)) {
// als ip valid is (deze controle niet helemaal zelf gemaakt ^^
         $string = gethostbyaddr($ip);
         $provider = explode(".", $string);
          return $provider[2];
    }else
        return false;
}
?>