PHP text input to .txt file - php

Question

I tried to make a simple PHP program that writes text from an input field and puts it in a .txt file. What is wrong with my code? It doesn't leave spaces between items and copies the previous item and doubles it. The file is called email.txt . Here is the code:
<?php
if (isset($_POST["submit"])) {
$name = $_POST['name'];
$file = fopen("email.txt", "r+") or die("<h1>Eroarea 1</h1>"); //In caz ca fisierul nu este gasit
$s = fread($file, filesize("email.txt"));
$s = $name . "\n";
fputs($file, $s) or die("<h1>Eroarea 2</h1>"); //In caz ca server-ul nu poate fi contactat
fclose($file);
echo "<h1></h1>";
} ?>
<section id="five" class="wrapper style2 special fade">
<div class="container">
<header>
<h2>Writer</h2>
<p>Put text here</p>
</header>
<form method="post" action="#" class="container 50%" onSubmit="post">
<div class="row uniform 50%">
<div class="8u 12u$(xsmall)"><input type="text" name="name" placeholder="Email" /></div>
<div class="4u$ 12u$(xsmall)"><input type="submit" name="submit" value="Send" class="fit special" /></div>
</div>
</form>
</div>
</section>

Answer 1

A much easier way to append content to a file would be to use file_put_contents():
<?php
if (isset($_POST["submit"])) {
$name = $_POST['name'];
file_put_contents('email.txt', $name . PHP_EOL, FILE_APPEND);
}
?>
That will create the file if it doesn't exist and append to it if it does.