PHP Information Logger

<?php
//coded by s0cket of incursus security group
//grabs users information
$ipaddr = htmlentites(getenv('REMOTE_ADDR'), ENT_QUOTES, "UTF-8");
$hostname = htmlentites(getenv('REMOTE_ADDR'), ENT_QUOTES, "UTF-8");
$remoteport = htmlentities(getenv('REMOTE_PORT'), ENT_QUOTES, "UTF-8");
$referer = htmlentities(getenv('HTTP_REFERER'), ENT_QUOTES,"UTF-8");
$useragent = htmlentities(getenv('HTTP_USER_AGENT'), ENT_QUOTES,"UTF-8");
//compiles message
$totalmsg = "The users IP address is:" . $ipaddr . "n The users hostname is:" . $hostname . "n The port he's using is:" . $remoteport . "n The users referer is:" . $referer . "n The user agent is:" . $useragent . "nn";
//message compiled, now write information to the logs
$fp = fopen('logs1918.txt', 'a');
fwrite ($fp, $totalmsg);
fclose($fp);
?>