PHP visit Logger-Aluf

<?
/*
 Visit logger-Created by Ryan
 File [ ips.txt ]
 */
 # File Name
$file = "ips.txt";
 # IP Address
$ip = $_SERVER['REMOTE_ADDR'];
 # Browser
$br = $_SERVER['HTTP_USER_AGENT'];
 # Data & Time
$dt = date(DATE_RFC822);

        /* Here Save Log !*/
 $krz = fopen($file,"a+");
    $source = "/*=============================================================*\ "."\r\n";
        $source .= "This $ip Login N' $dt "."\r\n";
    $source .= "His Browser is : $br"."\r\n";
 fputs($krz,$source);
 fclose($krz);
?>