CameViaWebsite

function CameViaWebsite()
{
    if(empty($_SERVER['HTTP_REFERER'])) return false;
    $url = $_SERVER['HTTP_REFERER'];
    $url = explode('http://',$url);
    $url = $url[1];
    $url = explode("/",$url);
    $url = $url[0];
    $key = $_SERVER['SERVER_NAME'];
    if($key == str_replace($url,'',$key)) return false;
    return true;
}