Untitled

<?php
if(!isset($_POST['submit']))

$user = $_POST['username'];
$pass = $_POST['password'];
$email = $_POST['email'];

$email_from = 'Me@email.com';
$email_subject = "Username and Password for you";
$email_body = "Username: $user n".
"Password: $pass n".

$to = $email;
$headers = "From: $email_from rn";
$headers .= "Reply-To: $visitor_from rn";

mail($to,$email_subject,$email_body,$headers);

?>

<!DOCTYPE html>
<html>
<head>
<title>Login Form in PHP with Session</title>
<link href="style.css" rel="stylesheet" type="text/css">
</head>
<body>
<form action="db.php" method="post">
  First name:<br>
  <input type="text" name="username" readonly value='<?php echo $random_first .'_'. $random_second; ?>'><br>
  Last name:<br>
  <input type="text" name="password" readonly value='<?php echo $pw; ?>'><BR>
  Enter your email to get a copy of these!<br>
  <input type="text" name="email"><BR>
  <input type ="submit" value = "submit" name="submit">
</form>
</body>

Username:
Password: hG31cZbTL