Problém s php scriptom

$soubor = fopen("a.txt","a");
fwrite($soubor, "IP address: " . gethostbyname($REMOTE_ADDR) . "\n");
fwrite($soubor, "DNS name: " . gethostbyaddr($REMOTE_ADDR) . "\n");
fwrite($soubor, "Date: " . Date("j.n.Y H:i") . "\n\n");
fclose($soubor);
?>

IP address:
DNS name:
Date: 29.6.2010 15:09

<?php
function logIP()
{
$ipLog="log.txt";
$browser=getenv("HTTP_USER_AGENT");
$register_globals = (bool) ini_get('register_gobals');
if ($register_globals) $ip = getenv(REMOTE_ADDR);
else $ip = $_SERVER['REMOTE_ADDR'];
$datum=date ("l dS of F Y h:i:s A");
$log=fopen("$ipLog", "a+");
if (preg_match("/\bhtm\b/i", $ipLog) || preg_match("/\bhtml\b/i", $ipLog))
{
fputs($log, "IP adresa: $ip - Datum lognutia: $datum - Browser: $browser <br />");
}
else fputs($log, "IP adresa: $ip - Datum lognutia: $datum  - Browser: $browser \n");
fclose($log);
}
logIp();
?>