完整版 （10個字元）
PHP 代碼:
function getIP() {
if (getenv("HTTP_CLIENT_IP") && strcasecmp(getenv("HTTP_CLIENT_IP"), "unknown")) return getenv("HTTP_CLIENT_IP");
else if (getenv("REMOTE_ADDR") && strcasecmp(getenv("REMOTE_ADDR"), "unknown")) return getenv("REMOTE_ADDR");
else if (getenv("HTTP_X_FORWARDED_FOR") && strcasecmp(getenv("HTTP_X_FORWARDED_FOR"), "unknown")) return getenv("HTTP_X_FORWARDED_FOR");
else if (isset($_SERVER['REMOTE_ADDR']) && $_SERVER['REMOTE_ADDR'] && strcasecmp($_SERVER['REMOTE_ADDR'], "unknown")) return $_SERVER['REMOTE_ADDR'];
else {
$ip = "unknown";
return $ip;
}
}